GeoSeismic Labs Reports: April 2007

April 1-7, 2007

A Weekly Compilation of Reviewed Infrasonic
Spectrograms & Associated Information
from Public Sources

Strong Infrasonic Resonant Harmonic Energy which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in California, Nevada, and Baja Mexico

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March 31, 2007: Peak Crustal Resonant Frequency = 0.16 Hz (-58.16 dBv)

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Editors Note:
The M8.1 earthquake occurred one hour after local sunrise, and two hours after the arrival of the Full Moon.
At a time when there was maximum lunar-tidal phase angle, and increasing solar induced stress.

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U.S. Naval Observatory
Astronomical Applications Department

Sun and Moon Data for One Day
The following information is provided for M8.1 Solomon Islands (longitude E156.9, latitude S8.4):

Monday
2 April 2007 Universal Time

SUN
Begin civil twilight 19:15 on preceding day
Sunrise 19:35 on preceding day
Sun transit 01:36
Sunset 07:36
End civil twilight 07:57

MOON
Moonset 18:58 on preceding day
Moonrise 07:14
Moon transit 13:26
Moonset 19:40
Moonrise 07:50 on following day

Full Moon on 2 April 2007 at 17:15 Universal Time.

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1 APR 2007 ( 91)

ot = 20:39:56.06 +/- 0.24 SOLOMON ISLANDS
lat = -8.481 +/- 6.7
lon = 156.978 +/- 5.2 MAGNITUDE 8.1 (GCMT)
dep = 10.0 (geophysicist)

45 km (30 miles) SSE of Gizo, New Georgia Islands, Solomon Isl. (pop 3,000)
205 km (125 miles) S of Chirovanga, Choiseul, Solomon Islands
345 km (215 miles) WNW of HONIARA, Guadalcanal, Solomon Islands
2145 km (1330 miles) NNE of BRISBANE, Queensland, Australia

At least 13 people killed, an undetermined number missing and
several villages destroyed by the earthquake and tsunami. About
300 homes, schools and a hospital were destroyed at Sasamunga and
about 500 houses were damaged at Gizo. Tsunami damage also
occurred on Lefung and Taro. Felt at Honiara. The tsunami also
caused damage on Rossel Island and Bougainville, Papua New Guinea.

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Strong Infrasonic Resonant Harmonic Energy which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in California, Nevada, and Baja Mexico

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April 1, 2007: Peak Crustal Resonant Frequency = 0.59 Hz (-66.14 dBv)

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Acoustic Emissions Catalog Table of Contents

• All Infrasonic Spectrograms Captured During.................................
  January 2007
• All Infrasonic Spectrograms Captured During................................
  February 2007
• All Infrasonic Spectrograms Captured During....................................
  March 2007

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• All Infrasonic Spectrograms Captured From..............................
  April 1-7, 2007
• All Infrasonic Spectrograms Captured From............................
  April 8-14, 2007
• All Infrasonic Spectrograms Captured From..........................
  April 15-21, 2007
• All Infrasonic Spectrograms Captured From..........................
  April 22-30, 2007

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• All Infrasonic Spectrograms Captured on.....................................
  April 1, 2007
• All Infrasonic Spectrograms Captured on.....................................
  April 2, 2007
• All Infrasonic Spectrograms Captured on.....................................
  April 3, 2007
• All Infrasonic Spectrograms Captured on.....................................
  April 4, 2007
• All Infrasonic Spectrograms Captured on.....................................
  Apri 5, 2007
• All Infrasonic Spectrograms Captured on.....................................
  April 6, 2007
• All Infrasonic Spectrograms Captured on.....................................
  April 7, 2007

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• All Infrasonic Spectrograms Captured During.................................
  May 2007

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Strong Global Earthquakes

• The Solomon Islands M8.1 Earthquake ......................................
  April 1, 2007
• The Solomon Islands M6.7 Earthquake ......................................
  April 1, 2007
• The Solomon Islands M6.4 Earthquake ......................................
  April 1, 2007
• The Solomon Islands M6.0 Earthquake ......................................
  April 2, 2007
• The Solomon Islands M6.2 Earthquake ......................................
  April 2, 2007
• The Solomon Islands M6.2 Earthquake ......................................
  April 2, 2007
• The Hindu Kush, Afghanistan M6.2 Earthquake .....................
  April 3, 2007
• The Loyalty Islands M6.3 Earthquake ........................................
  April 3, 2007
• The Solomon Islands M6.0 Earthquake .....................................
  April 4, 2007
• The Solomon Islands M6.4 Earthquake ....................................
  April 4, 2007
• The Loyalty Islands M6.2 Earthquake .......................................
  April 4, 2007
• The Vanuatu Region M6.4 Earthquake ....................................
  April 4, 2007
• The Azore Islands M6.3 Earthquake ........................................
  April 5, 2007
• The Azore Islands M6.0 Earthquake ........................................
  April 7, 2007

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Pacific Plate's Stress Center Related Earthquakes

• The Solomon Islands M8.1 Earthquake ......................................
  April 1, 2007
• The Solomon Islands M6.7 Earthquake ......................................
  April 1, 2007
• The Solomon Islands M6.4 Earthquake ......................................
  April 1, 2007
• The Solomon Islands M5.6 Earthquake ......................................
  April 1, 2007
• The Solomon Islands M5.5 Earthquake ......................................
  April 1, 2007
• The Solomon Islands M5.7 Earthquake ......................................
  April 1, 2007
• The Solomon Islands M5.3 Earthquake ......................................
  April 1, 2007
• The Solomon Islands M5.2 Earthquake ......................................
  April 1, 2007
• The Solomon Islands M5.8 Earthquake ......................................
  April 1, 2007
• The Solomon Islands M5.1 Earthquake ......................................
  April 1, 2007
• The Solomon Islands M5.3 Earthquake ......................................
  April 1, 2007
• The Solomon Islands M5.0 Earthquake ......................................
  April 2, 2007
• The Solomon Islands M5.3 Earthquake ......................................
  April 2, 2007
• The Solomon Islands M5.3 Earthquake ......................................
  April 2, 2007
• The Solomon Islands M5.6 Earthquake ......................................
  April 2, 2007
• The Solomon Islands M5.1 Earthquake ......................................
  April 2, 2007
• The Solomon Islands M5.6 Earthquake ......................................
  April 2, 2007
• The Solomon Islands M5.3 Earthquake ......................................
  April 2, 2007
• The Solomon Islands M6.0 Earthquake ......................................
  April 2, 2007
• The Solomon Islands M6.2 Earthquake ......................................
  April 2, 2007
• The Solomon Islands M5.5 Earthquake ......................................
  April 2, 2007
• The Solomon Islands M5.4 Earthquake ......................................
  April 2, 2007
• The Solomon Islands M5.7 Earthquake ......................................
  April 2, 2007
• The Solomon Islands M5.1 Earthquake ......................................
  April 2, 2007
• The Solomon Islands M5.0 Earthquake ......................................
  April 2, 2007
• The Solomon Islands M5.2 Earthquake ......................................
  April 2, 2007
• The Solomon Islands M5.0 Earthquake ......................................
  April 2, 2007
• The Solomon Islands M5.1 Earthquake ......................................
  April 2, 2007
• The Solomon Islands M6.2 Earthquake ......................................
  April 2, 2007
• The Solomon Islands M4.9 Earthquake ......................................
  April 3, 2007
• The Solomon Islands M5.5 Earthquake ......................................
  April 3, 2007
• The Solomon Islands M4.9 Earthquake ......................................
  April 3, 2007
• The Solomon Islands M5.2 Earthquake ......................................
  April 3, 2007
• The Solomon Islands M5.3 Earthquake ......................................
  April 3, 2007
• The Solomon Islands M5.2 Earthquake ......................................
  April 3, 2007
• The Solomon Islands M5.5 Earthquake ......................................
  April 3, 2007
• The Solomon Islands M4.9 Earthquake ......................................
  April 3, 2007
• The Solomon Islands M5.5 Earthquake ......................................
  April 3, 2007
• The Solomon Islands M5.8 Earthquake ......................................
  April 3, 2007
• The Solomon Islands M4.9 Earthquake ......................................
  April 3, 2007
• The Solomon Islands M5.2 Earthquake ......................................
  April 3, 2007
• The Solomon Islands M5.2 Earthquake ......................................
  April 3, 2007
• The Solomon Islands M5.4 Earthquake ......................................
  April 3, 2007
• The Loyalty Islands M6.3 Earthquake ........................................
  April 3, 2007
• The Solomon Islands M5.2 Earthquake ......................................
  April 3, 2007
• The Solomon Islands M5.0 Earthquake ......................................
  April 4, 2007
• The Solomon Islands M6.0 Earthquake ......................................
  April 4, 2007
• The Solomon Islands M4.9 Earthquake ......................................
  April 4, 2007
• The Solomon Islands M4.7 Earthquake ......................................
  April 4, 2007
• The Solomon Islands M6.4 Earthquake ......................................
  April 4, 2007
• The Loyalty Islands M6.2 Earthquake .......................................
  April 4, 2007
• The Vanuatu Region M6.4 Earthquake ......................................
  April 4, 2007
• The Loyalty Islands M5.0 Earthquake .......................................
  April 4, 2007
• The Fiji Islands Region M4.6 Earthquake .................................
  April 5, 2007
• The Fiji Islands Region M5.2 Earthquake .................................
  April 5, 2007
• The Vanuatu Region M4.9 Earthquake ......................................
  April 5, 2007
• The Solomon Islands M5.5 Earthquake ......................................
  April 6, 2007
• The Solomon Islands M4.5 Earthquake ......................................
  April 6, 2007
• The Solomon Islands M5.0 Earthquake ......................................
  April 6, 2007
• The Tonga Region M4.5 Earthquake ..........................................
  April 6, 2007
• The Solomon Islands M5.0 Earthquake ......................................
  April 6, 2007
• The Loyalty Islands M5.0 Earthquake .......................................
  April 7, 2007
• The Loyalty Islands M5.2 Earthquake .......................................
  April 7, 2007

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North American Earthquakes of Special Interest

• The Oaxaca, Mexico M4.0 Earthquake ........................................
  April 1, 2007

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California, Nevada, and Baja Mexico Earthquakes

• The Bishop, CA M3.9 Earthquake ..............................................
  April 1, 2007
• The Ocotillo, CA M3.4 Earthquake ............................................
  April 1, 2007
• The San Lucas, CA M3.4 Earthquake ........................................
  April 2, 2007
• The Bishop, CA M3.0 Earthquake ..............................................
  April 3, 2007
• The Bradbury, CA M3.4 Earthquake .........................................
  April 3, 2007
• The Templeton, CA M3.1 Earthquake ......................................
  April 4, 2007
• The Petrolia, CA M4.1 Earthquake ...........................................
  April 5, 2007
• The Humbolt Hill, CA M3.3 Earthquake .................................
  April 6, 2007
• The Ferndale, CA M4.2 Earthquake .........................................
  April 7, 2007

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North American Micro Quakes of Special Interest

• The Palmdale, CA M2.8 Earthquake ...........................................
  April 6, 2007

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Southern California Seismic Alert: San Jacinto Fault Zone

The Loma Linda Fault is an Active Splay of the San Jacinto Fault Zone, which has been obscured for many years by urban expansion & land development.

Note: The Anza Seismic Gap is a locked segment along the Southern San Jacinto Fault Zone from Anza and Southeast to Coyote Mountain. Micro quake activity within the gap is mainly constrained to two high stress regions concentrated at both ends of the asperity, and only at a depth of 15 km in the seismogenic zone, which is right above the upper limit of aseismic slip.

• The State of Stress in the Anza
  Seismic Gap
• Fault Processes within the Anza
  Seismic Gap
• An Analysis of Stress in the Anza
  Seismic Gap
• Concerns for an Anza Seismic Gap
  Earthquake
• Article on
  Seismicity at the Northern San Jacinto Fault Zone's Seismic Gap
• Article on
  Delineation of Faulting along the Loma Linda Fault
• Article on
  Complcations at the Right-Step Over to the San Andreas Fault.

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Contributions Made to GeoSeismic Labs

To keep the flow of this important information & data ongoing to you, I personally never accept Government Grants, or Funding for this project. Only small contributions from Individuals and sponsers who are supporters of this work will be accepted by GeoSeismic Labs, which is a State Registered Non-Profit Public Benefit Corporation since 2001.

• Instructions on How to Make a Donation to the Lab Using   Paypal.

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Useful Links & Other Related Sources of Information

• Prediction of Earthquakes With AE/MS? Why Not
  
• Introduction: Acoustic Emissions and Earthquakes
  
• Acoustic emission and earthquake precursors
  
• Topic: Acoustic Emission Precursors of Large California Earthquakes
  
• Technologies and Applications Acoustic Emission* (AE)
  
• Rock Mechanics - Laboratory and Theoretical Studies
  
• Fracture experiment of large rock samples with acoustic emission
  
• AE:Back to Basics
  
• Lithospheric Deformation: Stress & Strain
  
• The San Andreas Fault: Stress & Heat Flow
  
• ULF Electromagnetic & Acoustic Emissions (AE) as Precursor
  

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Caption:The inferred Mean Average Unclamping Incident Level Observed from
the Pacific-North American Plate Boundary in Southern California.
Major Global Earthquakes have been Preceded by abrupt increases in the
Unclamping Incident Level, as observed during both   December 2004,
  October 2005., and   September 2006.

The Pacific Plate is inferred to have transmitted the changes observed here from a large increase in lithospheric stress along the Sunda Trench, and the Eurasian Plate. The inference was first made after the M9.2 Great Sumatra Earthquake, which was preceded by an abrupt increase in the local Unclamping Incident Level. Since then, I've experimentally utilized the Unclamping Incident Level as a means for monitoring global tectonic stress levels, with quite excellent results.

- Frank Condon

Caption: Global Tectonic Plates and Volcanoes

My philosophy, quite simply stated is:

The Plate Boundary including the western edge of the ECSZ is the
interface for the transmission of Infrasonic, or AE. Secondary faults
are the handshake lines, which handle the nucleation of the stress. The data lines are the harmonics, which indicate the severity and the approximate lattitude of the location by having a different amplitude and frequency for each of the specific harmonics in the infrasound spectrum. I monitor and record these frequencies, and analyze the results, which allows me to publish a specific forecast of the current regional lithospheric stress level. It's not magic, just good old fashioned hard work while conducting an analysis. I believe these infrasonic signals are the same ones, which enable many pets, wild animals, and humans to sense an increase in the level of stress before an earthquake happens. Also, I utilize the Spring Tides, Lunar Phases and Solar Activity level in my forecasts.

-Frank Condon
Independent Earthquake Precursor Research Consultant

NOTE: A more detailed version is available
as my  Statement Summary.

13 JAN 2007 ( 13)

ot = 04:23:20.96 +/- 0.14 EAST OF KURIL ISLANDS
lat = 46.288 +/- 3.5
lon = 154.448 +/- 2.6 MAGNITUDE 8.2 (GS)
dep = 10.0 (geophysicist)

505 km (315 miles) SSW of Severo-Kuril'sk, Kuril Islands, Russia
525 km (325 miles) ENE of Kuril'sk, Kuril Islands
1710 km (1060 miles) NE of TOKYO, Japan
7260 km (4510 miles) NE of MOSCOW, Russia

21 JAN 2007 ( 21)

ot = 11:27:43.21 +/- 0.18 MOLUCCA SEA
lat = 1.240 +/- 4.7
lon = 126.403 +/- 5.1 MAGNITUDE 7.5 (GCMT)
dep = 10.0 (geophysicist)

120 km (75 miles) WNW of Ternate, Moluccas, Indonesia (pop 83,000)
175 km (110 miles) E of Manado, Sulawesi, Indonesia
1590 km (990 miles) SSE of MANILA, Philippines
2325 km (1450 miles) ENE of JAKARTA, Java, Indonesia

Felt (V) at Manado, Indonesia. Also felt at Bitung, Indonesia.

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Daily Infrasonic Spectrograms

April 1, 2007

24 Hour Peak Crustal Resonant Frequency = 0.59 Hz (-66.14 dBv)

00:00-03:00 UTC

Return to Table of Contents
Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

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ML1.1 2007/04/01 02:59:46 33.987 -117.161 12.2 8 km ( 5 mi) S of Redlands, CA

M5.5 2007/04/01 02:51:05 32.322 137.641 368.8 IZU ISLANDS, JAPAN REGION

ML1.4 2007/04/01 01:39:50 34.048 -117.243 16.8 1 km ( 0 mi) E of Loma Linda, CA
ML1.1 2007/04/01 01:22:57 35.831 -117.695 8.7 23 km ( 14 mi) NNE of Inyokern, CA
ML1.1 2007/04/01 01:22:57 35.827 -117.686 11.1 23 km ( 14 mi) N of Ridgecrest, CA

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03:00 - 06:00 UTC

Return to Table of Contents
Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

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ML1.0 2007/04/01 05:39:32 36.003 -117.786 8.0 15 km ( 10 mi) ESE of Coso Junction, CA

M4.9 2007/04/01 05:17:56 -17.767 -178.733 633.5 FIJI REGION

ML2.2 2007/04/01 04:58:24 38.710 -119.744 1.2 5 km ( 3 mi) ENE of Markleeville, CA
ML1.2 2007/04/01 03:56:31 33.738 -116.053 6.9 13 km ( 8 mi) ENE of Coachella, CA
ML1.7 2007/04/01 03:39:22 38.819 -122.814 2.1 2 km ( 1 mi) NNW of The Geysers, CA

M4.8 2007/04/01 03:20:21 -21.235 -174.347 35.0 TONGA

ML1.4 2007/04/01 03:19:18 35.658 -121.105 6.9 8 km ( 5 mi) ENE of San Simeon, CA
ML2.1 2007/04/01 03:12:27 38.677 -122.417 5.5 12 km ( 7 mi) NNE of Angwin, CA
ML1.2 2007/04/01 03:10:23 37.764 -122.570 10.5 7 km ( 4 mi) WNW of San Francisco Zoo

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06:00-09:00 UTC

Return to Table of Contents
Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

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M4.5 2007/04/01 08:46:06 46.892 153.275 10.0 KURIL ISLANDS

ML2.1 2007/04/01 07:24:40 38.502 -122.606 5.6 9 km ( 6 mi) SSW of Calistoga, CA

M5.1 2007/04/01 07:09:01 9.255 91.420 30.0 NICOBAR ISLANDS, INDIA REGION

ML2.0 2007/04/01 07:00:57 37.664 -122.512 3.2 5 km ( 3 mi) SW of Daly City, CA
ML1.2 2007/04/01 06:29:06 36.551 -121.144 2.4 2 km ( 1 mi) N of Pinnacles, CA
ML1.0 2007/04/01 06:16:54 38.825 -122.824 3.0 3 km ( 2 mi) NNW of The Geysers, CA

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09:00-12:00 UTC

Return to Table of Contents
Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

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ML1.7 2007/04/01 10:38:54 32.462 -115.350 7.0 24 km ( 15 mi) SSE of Mexicali, Mexico
ML1.3 2007/04/01 09:21:43 37.505 -116.394 0.0 43 km ( 27 mi) S of Silverbow, NV
ML2.2 2007/04/01 09:06:34 40.556 -123.960 23.1 11 km ( 7 mi) E of Hydesville, CA

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12:00-15:00 UTC

Return to Table of Contents
Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

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ML3.3 2007/04/01 14:57:40 19.028 -66.795 21.9 60 km ( 38 mi) N of Hatillo, PR

ML2.4 2007/04/01 14:27:01 39.318 -123.248 5.2 13 km ( 8 mi) SE of Willits, CA
ML2.9 2007/04/01 13:38:56 38.797 -122.762 2.5 4 km ( 2 mi) E of The Geysers, CA
ML1.1 2007/04/01 12:10:21 38.179 -118.499 8.0 15 km ( 9 mi) S of Qualeys Camp, NV

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15:00-18:00 UTC

Return to Table of Contents
Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

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ML2.0 2007/04/01 17:42:33 34.336 -116.465 11.2 24 km ( 15 mi) N of Yucca Valley, CA
ML1.5 2007/04/01 16:55:55 38.420 -119.357 9.2 21 km ( 13 mi) NNW of Bridgeport, CA
ML1.3 2007/04/01 16:47:57 34.019 -117.211 14.3 5 km ( 3 mi) SE of Loma Linda, CA

M4.3 2007/04/01 16:01:41 43.249 146.084 75.9 KURIL ISLANDS

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18:00-21:00 UTC

Return to Table of Contents
Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

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M6.7 2007/04/01 20:47:32 -7.133 155.661 10.0 SOLOMON ISLANDS

ML1.1 2007/04/01 20:41:20 37.651 -119.023 2.5 4 km ( 3 mi) WNW of Mammoth Lakes, CA

M8.1 2007/04/01 20:39:56 -8.453 156.957 10.0 SOLOMON ISLANDS

ML1.3 2007/04/01 20:37:24 37.651 -119.022 2.9 4 km ( 3 mi) WNW of Mammoth Lakes, CA
ML1.6 2007/04/01 20:19:05 37.649 -119.022 3.3 4 km ( 3 mi) WNW of Mammoth Lakes, CA
ML2.4 2007/04/01 20:11:27 38.808 -122.797 0.0 1 km ( 1 mi) NE of The Geysers, CA
ML1.7 2007/04/01 19:24:30 32.971 -115.901 8.0 27 km ( 17 mi) WSW of Westmorland, CA
ML1.9 2007/04/01 18:54:52 35.556 -120.756 3.8 4 km ( 3 mi) W of Templeton, CA
ML1.2 2007/04/01 18:52:15 32.732 -116.007 12.1 1 km ( 1 mi) SW of Ocotillo, CA
ML1.8 2007/04/01 18:32:00 38.795 -122.751 2.1 5 km ( 3 mi) E of The Geysers, CA

M4.0 2007/04/01 18:15:18 16.705 -97.022 35.0 OAXACA, MEXICO
M4.4 2007/04/01 18:07:12 -12.984 168.610 609.3 SANTA CRUZ ISLANDS REGION

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21:00-24:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

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ML2.4 2007/04/01 23:38:23 36.029 -120.846 15.0 5 km ( 3 mi) E of San Ardo, CA
ML1.7 2007/04/01 23:37:28 38.831 -122.808 2.8 4 km ( 2 mi) N of The Geysers, CA
ML1.8 2007/04/01 23:35:35 35.031 -117.689 0.0 3 km ( 2 mi) NW of Boron, CA

M5.3 2007/04/01 23:25:28 -7.346 156.143 10.0 SOLOMON ISLANDS
M5.1 2007/04/01 23:09:39 -7.324 155.772 10.0 SOLOMON ISLANDS
M5.8 2007/04/01 22:57:23 -7.321 155.995 10.0 SOLOMON ISLANDS
M5.2 2007/04/01 22:45:33 -7.688 155.766 10.0 SOLOMON ISLANDS

ML2.3 2007/04/01 22:41:21 38.792 -122.747 3.3 5 km ( 3 mi) WNW of Anderson Springs, CA

M5.3 2007/04/01 22:41:05 -6.964 155.214 10.0 BOUGAINVILLE REGION, PAPUA NEW GUINEA
M5.3 2007/04/01 22:29:55 -7.250 155.323 10.0 SOLOMON ISLANDS

ML1.8 2007/04/01 22:12:58 38.817 -122.763 0.0 4 km ( 3 mi) WSW of Cobb, CA

M5.7 2007/04/01 21:45:38 -7.432 155.581 10.0 SOLOMON ISLANDS
M5.5 2007/04/01 21:43:16 -7.705 155.608 10.0 SOLOMON ISLANDS
M5.6 2007/04/01 21:26:27 -7.317 155.401 10.0 SOLOMON ISLANDS

M6.4 2007/04/01 21:11:34 -7.441 155.774 10.0 SOLOMON ISLANDS

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April 2, 2007

24 Hour Peak Crustal Resonant Frequency = 0.58 Hz (-66.68 dBv)

00:00-03:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.3 2007/04/02 02:57:27 37.278 -118.461 22.3 7 km ( 4 mi) W of Wilkerson, CA

M5.5 2007/04/02 02:49:43 -45.219 -72.823 35.0 AISEN, CHILE

ML1.6 2007/04/02 02:06:23 37.373 -118.381 12.4 1 km ( 1 mi) NE of Bishop, CA
ML1.0 2007/04/02 01:56:42 33.837 -116.882 13.2 10 km ( 6 mi) N of Valle Vista, CA

M5.3 2007/04/02 01:36:16 -7.202 155.474 10.0 SOLOMON ISLANDS
M5.3 2007/04/02 01:31:03 -8.196 157.108 10.0 SOLOMON ISLANDS

ML1.7 2007/04/02 01:23:07 37.373 -118.383 13.0 1 km ( 1 mi) NE of Bishop, CA
ML1.5 2007/04/02 01:22:37 37.383 -118.381 12.4 2 km ( 1 mi) NNE of Bishop, CA
ML1.5 2007/04/02 01:11:34 37.386 -118.397 11.9 2 km ( 1 mi) N of Bishop, CA
ML1.8 2007/04/02 01:08:11 37.376 -118.385 13.0 1 km ( 1 mi) NE of Bishop, CA

ML3.9 2007/04/02 01:04:15 37.370 -118.375 15.1 2 km ( 1 mi) ENE of Bishop, CA

ML2.4 2007/04/02 00:56:38 37.380 -118.380 12.7 2 km ( 1 mi) NE of Bishop, CA
ML1.9 2007/04/02 00:55:48 37.379 -118.381 13.4 2 km ( 1 mi) NE of Bishop, CA

M4.9 2007/04/02 00:49:48 -6.858 155.457 10.0 BOUGAINVILLE REGION, PAPUA NEW GUINEA

ML1.3 2007/04/02 00:39:29 38.818 -122.792 4.5 3 km ( 2 mi) NNE of The Geysers, CA
ML1.4 2007/04/02 00:23:28 35.395 -118.578 4.5 17 km ( 11 mi) N of Keene, CA
ML1.7 2007/04/02 00:18:41 37.377 -118.383 12.6 2 km ( 1 mi) NE of Bishop, CA
ML2.5 2007/04/02 00:13:29 37.378 -118.380 13.8 2 km ( 1 mi) NE of Bishop, CA

M5.0 2007/04/02 00:10:56 -7.077 155.888 10.0 SOLOMON ISLANDS

ML1.0 2007/04/02 00:10:09 35.711 -121.016 8.1 13 km ( 8 mi) WSW of Lake Nacimiento, CA

---

03:00 - 06:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

ML2.4 2007/04/02 05:42:57 33.736 -117.486 7.8 14 km ( 9 mi) WNW of Lake Elsinore, CA

M5.6 2007/04/02 05:33:36 -7.309 155.323 10.0 SOLOMON ISLANDS
M5.1 2007/04/02 05:30:46 -7.176 155.663 10.0 SOLOMON ISLANDS

ML1.7 2007/04/02 05:30:50 37.572 -118.796 7.2 10 km ( 6 mi) W of Toms Place, CA
ML1.9 2007/04/02 05:29:24 38.814 -122.816 3.1 2 km ( 1 mi) NNW of The Geysers, CA
ML1.5 2007/04/02 05:08:24 35.864 -120.407 4.6 5 km ( 3 mi) SSE of Parkfield, CA
ML1.0 2007/04/02 05:03:25 36.567 -121.109 8.1 5 km ( 3 mi) NE of Pinnacles, CA
ML2.2 2007/04/02 04:44:13 38.398 -118.732 10.8 17 km ( 11 mi) SW of Hawthorne, NV
ML1.8 2007/04/02 04:41:22 38.400 -118.729 11.7 17 km ( 10 mi) SW of Hawthorne, NV
ML1.1 2007/04/02 04:37:29 37.556 -117.355 0.0 20 km ( 12 mi) SSW of West Spring, NV

M5.6 2007/04/02 04:11:40 -7.176 156.067 10.0 SOLOMON IISLANDS
M4.8 2007/04/02 04:03:21 -6.868 155.160 10.0 BOUGAINVILLE REGION, PAPUA NEW GUINEA

ML3.4 2007/04/02 03:55:15 32.183 -115.878 6.0 63 km ( 39 mi) S of Ocotillo, CA

ML1.5 2007/04/02 03:35:49 37.374 -118.386 13.1 1 km ( 1 mi) NE of Bishop, CA
ML1.3 2007/04/02 03:23:32 37.380 -118.385 12.6 2 km ( 1 mi) NNE of Bishop, CA
ML1.4 2007/04/02 03:10:56 37.375 -118.388 13.4 1 km ( 1 mi) NNE of Bishop, CA

---

06:00-09:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.2 2007/04/02 08:08:23 33.337 -116.352 15.2 10 km ( 6 mi) N of Borrego Springs, CA

M5.3 2007/04/02 07:16:33 -7.465 156.145 10.0 SOLOMON ISLANDS
M5.0 2007/04/02 06:58:53 44.375 149.025 52.3 KURIL ISLANDS

ML4.6 2007/04/02 06:53:45 52.313 -169.397 32.3 FOX ISLANDS, ALEUTIAN ISLANDS, ALASKA

M5.0 2007/04/02 06:52:04 44.434 149.169 10.0 KURIL ISLANDS

ML3.1 2007/04/02 06:23:25 18.843 -67.141 11.8 40 km ( 25 mi) NNW of Isabela, PR

---

09:00-12:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.5 2007/04/02 11:01:03 38.819 -122.799 1.4 2 km ( 1 mi) NNE of The Geysers, CA

M6.0 2007/04/02 10:49:15 -7.197 156.192 10.0 SOLOMON ISLANDS

ML1.0 2007/04/02 10:17:58 35.910 -117.904 4.6 16 km ( 10 mi) SSE of Coso Junction, CA
ML1.2 2007/04/02 09:47:39 34.142 -117.435 12.8 5 km ( 3 mi) NNE of Fontana, CA

---

12:00-15:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.4 2007/04/02 14:57:37 33.912 -117.043 16.5 7 km ( 4 mi) WSW of Beaumont, CA

M5.1 2007/04/02 14:20:49 -8.656 157.692 10.0 SOLOMON ISLANDS
M5.7 2007/04/02 13:53:07 -8.657 157.627 10.0 SOLOMON ISLANDS
M5.4 2007/04/02 13:49:54 -7.811 156.518 10.0 SOLOMON ISLANDS
M5.5 2007/04/02 12:35:26 -8.740 157.679 10.0 SOLOMON ISLANDS
M4.9 2007/04/02 12:19:22 44.196 149.210 46.1 KURIL ISLANDS

M6.2 2007/04/02 12:02:23 -8.539 157.548 10.0 SOLOMON ISLANDS

---

15:00-18:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.5 2007/04/02 17:35:48 34.051 -117.240 17.0 1 km ( 1 mi) ENE of Loma Linda, CA
ML2.3 2007/04/02 17:25:43 38.829 -122.810 2.0 3 km ( 2 mi) N of The Geysers, CA
ML1.8 2007/04/02 17:18:44 34.504 -118.104 13.9 8 km ( 5 mi) ENE of Acton, CA
ML2.4 2007/04/02 16:54:38 38.818 -122.809 3.7 2 km ( 1 mi) N of The Geysers, CA
ML1.2 2007/04/02 16:40:30 37.473 -118.840 5.3 17 km ( 11 mi) SW of Toms Place, CA
ML2.1 2007/04/02 16:12:51 38.824 -122.759 0.6 3 km ( 2 mi) WSW of Cobb, CA

M5.2 2007/04/02 16:08:20 -8.622 157.778 10.0 SOLOMON ISLANDS

ML1.8 2007/04/02 15:44:18 36.672 -115.758 3.2 13 km ( 8 mi) NNW of Indian Springs, NV

M5.0 2007/04/02 15:40:05 -7.397 155.559 10.0 SOLOMON ISLANDS

ML1.2 2007/04/02 15:33:46 38.817 -122.784 2.6 3 km ( 2 mi) NE of The Geysers, CA

---

18:00-21:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.5 2007/04/02 20:59:09 37.453 -117.078 0.0 23 km ( 14 mi) NE of Tokop, NV
ML1.7 2007/04/02 20:29:36 33.895 -116.995 19.1 4 km ( 2 mi) SSW of Beaumont, CA
ML1.1 2007/04/02 20:03:51 36.397 -116.070 12.0 22 km ( 13 mi) NNW of Pahrump, NV
ML1.1 2007/04/02 19:49:40 36.649 -121.259 0.0 17 km ( 10 mi) SSE of Tres Pinos, CA

M5.9 2007/04/02 19:42:56 1.375 125.786 50.6 MOLUCCA SEA

ML1.2 2007/04/02 19:03:27 34.265 -116.423 0.0 16 km ( 10 mi) N of Yucca Valley, CA
ML1.0 2007/04/02 18:33:48 36.037 -117.768 2.3 16 km ( 10 mi) E of Coso Junction, CA

M5.0 2007/04/02 18:17:44 -7.653 156.432 10.0 SOLOMON ISLANDS

---

21:00-24:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

M5.4 2007/04/02 23:31:15 -6.926 155.370 10.0 BOUGAINVILLE REGION, PAPUA NEW GUINEA

M6.2 2007/04/02 23:20:23 -8.494 157.352 10.0 SOLOMON ISLANDS

ML1.0 2007/04/02 22:51:31 36.407 -115.571 0.0 18 km ( 11 mi) NNE of Mount Charleston, NV

M5.6 2007/04/02 22:49:53 -9.704 154.633 10.0 D'ENTRECASTEAUX ISLANDS REGION
M4.7 2007/04/02 22:49:23 -9.683 154.528 10.0 D'ENTRECASTEAUX ISLANDS REGION

ML3.2 2007/04/02 22:43:01 18.688 -64.604 52.4 26 km ( 16 mi) N of East End-Long Look, British Virgin Islands

M5.0 2007/04/02 22:41:23 -9.030 155.710 10.0 D'ENTRECASTEAUX ISLANDS REGION

ML1.6 2007/04/02 22:28:58 37.444 -118.841 6.4 19 km ( 12 mi) SW of Toms Place, CA

M5.1 2007/04/02 22:10:10 -7.718 155.657 10.0 SOLOMON ISLANDS

---

April 3, 2007

24 Hour Peak Crustal Resonant Frequency = 0.59 Hz (-66.73 dBv)

00:00-03:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

M5.3 2007/04/03 02:46:38 -7.768 155.720 10.0 SOLOMON ISLANDS
M5.0 2007/04/03 02:15:16 46.517 152.604 10.0 KURIL ISLANDS
M5.2 2007/04/03 01:42:06 -8.778 157.367 10.0 SOLOMON ISLANDS
M4.9 2007/04/03 01:15:58 -8.510 157.458 10.0 SOLOMON ISLANDS
M5.5 2007/04/03 00:28:40 -7.131 155.449 10.0 SOLOMON ISLANDS
M4.9 2007/04/03 00:24:57 -8.476 157.460 10.0 SOLOMON ISLANDS
M5.1 2007/04/03 00:22:10 -9.876 154.692 10.0 D'ENTRECASTEAUX ISLANDS REGION

---

03:00 - 06:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

M5.5 2007/04/03 05:21:19 -8.501 157.425 10.0 SOLOMON ISLANDS

ML3.4 2007/04/03 05:08:23 36.249 -120.816 6.7 23 km ( 14 mi) NE of San Lucas, CA

M5.2 2007/04/03 05:07:43 -8.622 157.558 10.0 SOLOMON ISLANDS

ML1.6 2007/04/03 04:33:20 37.638 -118.435 5.5 23 km ( 14 mi) ENE of Toms Place, CA
ML1.6 2007/04/03 03:46:35 37.634 -118.442 6.5 22 km ( 14 mi) ENE of Toms Place, CA

ML4.1 2007/04/03 03:44:24 51.166 178.626 6.7 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA

M6.2 2007/04/03 03:35:07 36.528 70.668 210.5 HINDU KUSH REGION, AFGHANISTAN

---

06:00-09:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.2 2007/04/03 08:19:26 33.684 -116.724 16.1 7 km ( 4 mi) S of Idyllwild, CA
ML2.0 2007/04/03 07:48:30 32.643 -115.667 8.0 16 km ( 10 mi) WSW of Calexico, CA
ML1.1 2007/04/03 07:42:02 33.660 -116.707 16.4 9 km ( 6 mi) S of Idyllwild, CA
ML1.7 2007/04/03 07:24:22 32.658 -115.688 7.6 15 km ( 9 mi) S of Seeley, CA
ML1.4 2007/04/03 07:21:02 33.176 -116.031 10.7 10 km ( 6 mi) ENE of Ocotillo Wells, CA
ML1.4 2007/04/03 06:53:48 34.350 -116.755 5.9 13 km ( 8 mi) NE of Big Bear City, CA
ML1.8 2007/04/03 06:49:03 32.615 -115.660 10.5 17 km ( 10 mi) WSW of Calexico, CA
ML2.0 2007/04/03 06:46:45 40.228 -121.149 11.7 2 km ( 1 mi) NNE of Prattville, CA
ML1.0 2007/04/03 06:31:22 36.807 -115.507 0.0 30 km ( 19 mi) NNE of Indian Springs, NV
ML2.1 2007/04/03 06:30:45 40.230 -121.158 16.0 2 km ( 1 mi) NE of Almanor, CA

---

09:00-12:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

M5.5 2007/04/03 11:57:31 -7.766 155.568 10.0 SOLOMON ISLANDS

ML1.0 2007/04/03 11:20:49 37.522 -118.825 6.2 14 km ( 8 mi) WSW of Toms Place, CA
ML2.6 2007/04/03 11:15:55 37.620 -119.443 1.6 18 km ( 11 mi) SE of Yosemite Valley, CA
ML2.2 2007/04/03 10:51:59 37.523 -118.821 6.6 13 km ( 8 mi) WSW of Toms Place, CA

M5.1 2007/04/03 10:40:37 -6.780 155.707 10.0 BOUGAINVILLE REGION, PAPUA NEW GUINEA

ML1.6 2007/04/03 10:37:33 33.890 -116.267 5.5 14 km ( 9 mi) NE of Thousand Palms, CA
ML1.1 2007/04/03 10:27:56 37.259 -121.635 6.0 15 km ( 9 mi) N of Morgan Hill, CA
ML1.9 2007/04/03 10:27:49 37.258 -121.639 5.1 15 km ( 9 mi) N of Morgan Hill, CA

M4.9 2007/04/03 10:19:38 -7.915 156.036 10.0 SOLOMON ISLANDS

ML1.3 2007/04/03 09:43:06 34.435 -116.265 8.0 26 km ( 16 mi) NW of Twentynine Palms Base, CA
ML1.4 2007/04/03 09:35:19 35.657 -118.466 11.5 2 km ( 1 mi) N of town of Lake Isabella, CA
ML1.3 2007/04/03 09:16:39 35.564 -118.235 6.5 12 km ( 8 mi) SE of Weldon, CA

M5.2 2007/04/03 09:11:44 -7.290 155.705 10.0 SOLOMON ISLANDS

---

12:00-15:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.6 2007/04/03 13:51:33 38.149 -116.481 0.0 11 km ( 7 mi) WSW of Warm Springs, NV

ML4.4 2007/04/03 13:46:45 51.319 -177.079 30.1 ANDREANOF ISLANDS, ALEUTIAN IS., ALASKA

M4.9 2007/04/03 13:18:31 -7.176 155.357 10.0 SOLOMON ISLANDS

ML1.3 2007/04/03 13:08:27 34.941 -118.964 18.1 3 km ( 2 mi) W of Grapevine, CA
ML1.2 2007/04/03 12:51:17 38.823 -122.784 3.1 3 km ( 2 mi) NE of The Geysers, CA
ML1.8 2007/04/03 12:40:39 33.889 -116.260 5.6 14 km ( 9 mi) NE of Thousand Palms, CA

M6.0 2007/04/03 12:04:28 -7.844 155.805 10.0 SOLOMON ISLANDS

ML1.1 2007/04/03 12:01:47 33.975 -116.880 18.4 5 km ( 3 mi) NNE of Banning, CA

---

15:00-18:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.1 2007/04/03 17:56:24 38.219 -118.652 0.0 15 km ( 9 mi) SW of Qualeys Camp, NV
ML1.2 2007/04/03 17:47:16 36.028 -117.764 2.0 17 km ( 10 mi) E of Coso Junction, CA

M5.2 2007/04/03 17:25:58 -8.765 157.472 10.0 SOLOMON ISLANDS
M5.0 2007/04/03 17:25:38 -0.467 125.826 43.2 MOLUCCA SEA

ML1.7 2007/04/03 16:58:11 35.713 -121.052 5.6 15 km ( 9 mi) ENE of San Simeon, CA
ML1.2 2007/04/03 15:39:59 32.704 -116.037 6.9 5 km ( 3 mi) SW of Ocotillo, CA

M5.2 2007/04/03 15:27:05 -7.233 155.395 10.0 SOLOMON ISLANDS

ML1.2 2007/04/03 15:22:43 36.997 -115.953 0.0 53 km ( 33 mi) NNW of Indian Springs, NV

---

18:00-21:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

M4.8 2007/04/03 20:44:57 46.515 153.059 10.0 KURIL ISLANDS

M6.2 2007/04/03 20:26:15 -20.695 168.864 41.4 LOYALTY ISLANDS

M5.6 2007/04/03 20:23:24 -4.379 102.959 78.9 SOUTHERN SUMATRA, INDONESIA

ML1.7 2007/04/03 20:18:26 32.883 -115.538 22.6 6 km ( 3 mi) NE of Imperial, CA

M4.9 2007/04/03 20:16:58 -6.974 155.097 10.0 BOUGAINVILLE REGION, PAPUA NEW GUINEA

ML1.6 2007/04/03 20:01:31 32.857 -115.529 13.1 4 km ( 3 mi) ENE of Imperial, CA
ML1.6 2007/04/03 19:55:53 35.588 -120.838 7.5 12 km ( 8 mi) WNW of Templeton, CA
ML1.5 2007/04/03 19:48:26 34.563 -116.273 11.9 20 km ( 13 mi) SSW of Ludlow, CA

M5.2 2007/04/03 19:42:25 -7.298 154.561 10.0 BOUGAINVILLE REGION, PAPUA NEW GUINEA
M5.4 2007/04/03 19:40:58 -7.113 155.315 10.0 SOLOMON ISLANDS

ML2.7 2007/04/03 19:26:25 37.367 -118.386 14.0 1 km ( 1 mi) ENE of Bishop, CA
ML2.3 2007/04/03 19:19:34 32.593 -115.733 4.9 23 km ( 14 mi) S of Seeley, CA
ML2.2 2007/04/03 19:08:06 32.595 -115.734 4.9 22 km ( 14 mi) S of Seeley, CA

M4.4 2007/04/03 19:06:33 -6.988 155.730 10.0 BOUGAINVILLE REGION, PAPUA NEW GUINEA
M4.6 2007/04/03 18:54:27 -7.219 155.671 10.0 SOLOMON ISLANDS
M4.6 2007/04/03 18:48:40 -4.878 145.234 179.3 NEAR NORTH COAST OF NEW GUINEA, P.N.G

ML1.5 2007/04/03 18:29:25 34.604 -116.622 5.5 35 km ( 21 mi) ENE of Lucerne Valley, CA

M4.8 2007/04/03 18:17:26 44.537 148.907 1.0 KURIL ISLANDS
M4.8 2007/04/03 18:14:04 44.351 149.084 34.9 KURIL ISLANDS

ML1.5 2007/04/03 18:13:15 32.596 -115.733 7.1 22 km ( 14 mi) S of Seeley, CA
ML1.6 2007/04/03 18:05:18 36.034 -115.061 0.0 3 km ( 2 mi) W of Henderson, NV

---

21:00-24:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.9 2007/04/03 23:57:35 37.367 -118.383 13.1 1 km ( 1 mi) ENE of Bishop, CA
ML2.5 2007/04/03 23:17:09 40.300 -124.395 17.1 10 km ( 6 mi) WSW of Petrolia, CA

M5.2 2007/04/03 22:17:43 -6.673 154.843 10.0 BOUGAINVILLE REGION, PAPUA NEW GUINEA
M4.7 2007/04/03 21:44:55 -7.319 155.091 10.0 SOLOMON ISLANDS

ML1.5 2007/04/03 21:39:57 36.151 -114.957 0.0 10 km ( 6 mi) ESE of Sunrise Manor, NV

M5.2 2007/04/03 21:34:56 -8.650 157.436 10.0 SOLOMON ISLANDS

ML2.8 2007/04/03 21:22:55 36.246 -120.820 1.0 22 km ( 14 mi) NE of San Lucas, CA

---

April 4, 2007

24 Hour Peak Crustal Resonant Frequency = 0.81 Hz (-69.29 dBv)

00:00-03:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

M4.9 2007/04/04 02:44:12 -7.860 155.737 10.0 SOLOMON ISLANDS

ML 1.1 2007/04/04 01:06:48 33.682 -116.684 19.0 7 km ( 5 mi) SSE of Idyllwild, CA

M5.1 2007/04/04 00:56:53 -3.317 -13.379 10.0 NORTH OF ASCENSION ISLAND

ML2.0 2007/04/04 00:54:14 35.643 -120.781 6.1 9 km ( 6 mi) W of Paso Robles, CA
ML 1.0 2007/04/04 00:49:55 35.662 -118.463 10.7 3 km ( 2 mi) N of town of Lake Isabella, CA
ML2.0 2007/04/04 00:47:06 34.638 -120.835 7.0 18 km ( 11 mi) WNW of Pt. Arguello, CA

M6.0 2007/04/04 00:39:45 -7.121 156.073 10.0 SOLOMON ISLANDS

M5.0 2007/04/04 00:35:19 -7.836 156.558 10.0 SOLOMON ISLANDS
M4.9 2007/04/04 00:18:27 23.349 143.718 35.0 VOLCANO ISLANDS, JAPAN

ML3.0 2007/04/04 00:05:09 37.361 -118.382 14.2 1 km ( 1 mi) ESE of Bishop, CA

---

03:00 - 06:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.6 2007/04/04 05:01:36 34.143 -116.432 10.1 2 km ( 1 mi) NW of Yucca Valley, CA
ML1.2 2007/04/04 03:42:32 34.273 -116.428 4.9 16 km ( 10 mi) N of Yucca Valley, CA
ML1.3 2007/04/04 03:14:53 32.711 -116.032 7.1 5 km ( 3 mi) SW of Ocotillo, CA

M4.7 2007/04/04 03:05:33 -8.482 157.521 10.0 SOLOMON ISLANDS

---

06:00-09:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

---

ML1.2 2007/04/04 08:59:08 32.708 -116.033 8.0 5 km ( 3 mi) SW of Ocotillo, CA

M5.0 2007/04/04 08:00:49 23.264 143.574 35.0 VOLCANO ISLANDS, JAPAN REGION

ML1.5 2007/04/04 07:20:34 33.190 -115.630 2.2 2 km ( 1 mi) NNE of Obsidian Butte, CA

M4.8 2007/04/04 07:05:44 23.173 143.565 30.7 VOLCANO ISLANDS, JAPAN REGION

M6.4 2007/04/04 06:34:35 -7.774 156.489 10.0 SOLOMON ISLANDS

ML1.0 2007/04/04 06:16:50 33.950 -116.837 9.5 6 km ( 4 mi) ENE of Banning, CA

M5.1 2007/04/04 06:09:42 -6.809 154.954 10.0 BOUGAINVILLE REGION, PAPUA NEW GUINEA

---

09:00-12:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.1 2007/04/04 11:56:41 34.180 -117.961 14.3 4 km ( 2 mi) NNE of Bradbury, CA
ML1.4 2007/04/04 11:30:36 34.186 -117.960 13.4 4 km ( 3 mi) NNE of Bradbury, CA
ML1.0 2007/04/04 11:28:49 34.188 -117.961 13.9 5 km ( 3 mi) NNE of Bradbury, CA

ML3.4 2007/04/04 11:27:03 34.190 -117.950 12.6 5 km ( 3 mi) NNE of Bradbury, CA

ML2.0 2007/04/04 11:23:30 34.186 -117.959 13.8 4 km ( 3 mi) NNE of Bradbury, CA
ML1.9 2007/04/04 11:06:42 32.288 -115.227 6.0 11 km ( 7 mi) W of Guadalupe Victoria, Mexico

M6.4 2007/04/04 11:02:29 -20.727 169.028 10.0 VANUATU
M6.2 2007/04/04 11:00:27 -20.754 168.880 10.0 LOYALTY ISLANDS

ML2.0 2007/04/04 10:26:17 38.813 -122.783 1.7 3 km ( 2 mi) NE of The Geysers, CA

M4.7 2007/04/04 10:16:11 44.312 149.031 10.0 KURIL ISLANDS

ML1.2 2007/04/04 09:52:29 34.422 -116.513 7.1 34 km ( 21 mi) NNW of Yucca Valley, CA

M5.3 2007/04/04 09:46:13 -6.377 154.236 10.0 BOUGAINVILLE REGION, PAPUA NEW GUINEA
M5.2 2007/04/04 09:35:58 -6.700 154.941 10.0 BOUGAINVILLE REGION, PAPUA NEW GUINEA

ML1.0 2007/04/04 09:34:01 33.420 -116.964 3.9 12 km ( 7 mi) NW of Palomar Observatory, CA

---

12:00-15:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.5 2007/04/04 14:58:16 32.663 -115.690 8.0 14 km ( 9 mi) S of Seeley, CA
M2.0 2007/04/04 14:56:34 32.645 -115.671 8.8 16 km ( 10 mi) S of Seeley, CA
ML1.6 2007/04/04 14:10:35 32.620 -115.642 12.7 15 km ( 9 mi) WSW of Calexico, CA
ML1.2 2007/04/04 13:52:26 34.013 -116.640 11.9 7 km ( 4 mi) SW of Morongo Valley, CA

---

15:00-18:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.0 2007/04/04 17:54:40 38.419 -118.654 16.0 12 km ( 8 mi) SSW of Hawthorne, NV
ML1.8 2007/04/04 17:43:49 33.992 -116.820 21.8 10 km ( 6 mi) NE of Banning, CA

M5.0 2007/04/04 16:38:42 -20.694 168.834 10.0 LOYALTY ISLANDS

ML1.7 2007/04/04 16:30:23 34.624 -116.555 8.2 38 km ( 23 mi) WSW of Ludlow, CA
ML1.5 2007/04/04 16:12:49 36.642 -121.259 4.9 16 km ( 10 mi) NW of Pinnacles, CA
ML1.4 2007/04/04 15:41:48 32.626 -115.670 9.7 17 km ( 11 mi) WSW of Calexico, CA
ML2.2 2007/04/04 15:40:43 38.519 -122.763 1.1 1 km ( 1 mi) NW of Larkfield-Wikiup, CA

ML3.6 2007/04/04 15:30:41 18.241 -68.155 81.8 72 km ( 45 mi) SE of Higüey, Dominican Republic

ML1.1 2007/04/04 15:30:05 32.666 -115.699 5.8 14 km ( 9 mi) S of Seeley, CA
ML1.5 2007/04/04 15:28:03 32.612 -115.632 12.8 15 km ( 9 mi) WSW of Calexico, CA
ML1.0 2007/04/04 15:25:45 36.541 -121.129 6.7 2 km ( 1 mi) NE of Pinnacles, CA
ML2.2 2007/04/04 15:20:12 34.002 -116.325 4.6 14 km ( 9 mi) S of Joshua Tree, CA
ML1.8 2007/04/04 15:02:24 36.194 -118.031 6.5 8 km ( 5 mi) SSW of Olancha, CA

---

18:00-21:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML3.1 2007/04/04 20:37:19 35.592 -120.835 6.6 12 km ( 8 mi) WNW of Templeton, CA

ML1.7 2007/04/04 20:36:58 36.087 -117.854 2.1 10 km ( 6 mi) ENE of Coso Junction, CA
ML1.6 2007/04/04 20:23:36 36.110 -114.909 0.0 12 km ( 7 mi) E of East Las Vegas, NV
ML1.4 2007/04/04 20:10:43 40.206 -118.247 8.0 20 km ( 12 mi) E of Lovelock, NV
ML1.3 2007/04/04 20:02:22 35.439 -120.764 11.3 10 km ( 6 mi) WSW of Atascadero, CA
ML1.5 2007/04/04 20:00:37 32.814 -117.060 0.0 6 km ( 4 mi) NW of La Mesa, CA
ML1.1 2007/04/04 19:58:22 33.887 -117.018 15.6 6 km ( 4 mi) SW of Beaumont, CA

M5.3 2007/04/04 19:58:04 -17.183 66.766 10.0 MAURITIUS - REUNION REGION

ML2.1 2007/04/04 19:56:49 38.833 -122.793 2.1 4 km ( 3 mi) NNE of The Geysers, CA
ML1.7 2007/04/04 19:28:19 38.717 -117.086 0.0 50 km ( 31 mi) SSE of Washington, NV

M4.9 2007/04/04 19:14:39 36.283 142.044 10.0 OFF THE EAST COAST OF HONSHU, JAPAN
M4.9 2007/04/04 18:53:41 30.892 141.682 28.9 IZU ISLANDS, JAPAN REGION

---

21:00-24:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.6 2007/04/04 23:29:51 35.028 -117.682 0.0 2 km ( 1 mi) NW of Boron, CA
ML1.7 2007/04/04 23:08:45 38.697 -117.086 0.0 53 km ( 33 mi) SSE of Washington, NV

M5.1 2007/04/04 23:04:05 44.450 148.959 26.5 KURIL ISLANDS

ML1.1 2007/04/04 23:07:59 38.825 -122.786 2.3 3 km ( 2 mi) NNE of The Geysers, CA

M5.1 2007/04/04 22:45:01 44.786 148.195 35.0 KURIL ISLANDS

ML2.0 2007/04/04 22:39:13 38.855 -122.852 1.5 7 km ( 5 mi) NNW of The Geysers, CA
ML1.5 2007/04/04 22:38:31 33.912 -117.482 0.0 8 km ( 5 mi) ESE of Norco, CA
ML2.1 2007/04/04 22:26:12 35.939 -115.264 0.0 12 km ( 7 mi) SSW of Enterprise, NV

M5.7 2007/04/04 21:40:23 30.904 141.635 39.0 IZU ISLANDS, JAPAN REGION
M4.5 2007/04/04 21:16:01 -6.750 154.703 10.0 BOUGAINVILLE REGION, PAPUA NEW GUINEA

---

April 5, 2007

24 Hour Peak Crustal Resonant Frequency = 0.59 Hz (-66.81 dBv)

00:00-03:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML2.3 2007/04/05 01:36:35 35.787 -121.275 5.5 18 km ( 11 mi) NNW of San Simeon, CA
ML1.7 2007/04/05 01:29:00 37.933 -118.607 2.4 42 km ( 26 mi) N of Toms Place, CA

M4.6 2007/04/05 01:16:05 -18.991 -177.702 571.2 FIJI REGION

ML1.5 2007/04/05 01:00:45 38.758 -122.734 2.7 4 km ( 3 mi) WSW of Anderson Springs, CA

---

03:00 - 06:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.9 2007/04/05 05:23:45 33.988 -116.384 8.9 12 km ( 7 mi) ENE of Desert Hot Springs, CA
ML2.3 2007/04/05 05:05:53 37.522 -118.823 7.0 13 km ( 8 mi) WSW of Toms Place, CA
ML1.9 2007/04/05 04:55:02 37.393 -117.079 0.0 19 km ( 12 mi) ENE of Tokop, NV
ML1.9 2007/04/05 04:53:21 32.205 -115.359 5.6 25 km ( 16 mi) WSW of Guadalupe Victoria, Mexico
ML1.4 2007/04/05 04:49:14 37.393 -117.079 0.0 19 km ( 12 mi) ENE of Tokop, NV
ML1.6 2007/04/05 04:46:00 37.393 -117.079 0.0 19 km ( 12 mi) ENE of Tokop, NV
ML1.4 2007/04/05 04:30:34 36.450 -114.870 0.0 3 km ( 2 mi) WSW of Dry Lake, NV

M6.3 2007/04/05 03:56:50 37.384 -24.618 10.0 AZORES ISLANDS REGION

ML1.0 2007/04/05 03:34:46 37.234 -117.233 0.0 8 km ( 5 mi) SSE of Tokop, NV

M5.2 2007/04/05 03:25:08 -16.957 -176.980 30.5 FIJI REGION

ML1.3 2007/04/05 03:09:14 33.245 -116.077 10.6 12 km ( 8 mi) NNE of Ocotillo Wells, CA

---

06:00-09:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML2.4 2007/04/05 08:20:24 38.821 -122.794 4.5 3 km ( 2 mi) NNE of The Geysers, CA
ML1.2 2007/04/05 07:18:10 34.159 -117.025 9.1 9 km ( 6 mi) SE of Running Springs, CA
ML1.9 2007/04/05 06:44:31 34.210 -117.515 6.4 11 km ( 7 mi) W of Devore, CA
ML1.9 2007/04/05 06:17:52 34.052 -118.917 9.5 13 km ( 8 mi) W of Malibu, CA

---

09:00-12:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

M4.8 2007/04/05 11:39:43 38.254 141.019 20.0 NEAR THE EAST COAST OF HONSHU, JAPAN

ML1.6 2007/04/05 10:30:17 35.704 -117.540 10.4 15 km ( 10 mi) NE of Ridgecrest, CA
ML1.3 2007/04/05 10:29:15 32.765 -115.423 14.2 7 km ( 4 mi) SW of Holtville, CA

ML4.5 2007/04/05 10:11:52 50.880 -181.260 10.0 339 km (211 mi) WSW of Adak, AK

M5.0 2007/04/05 10:06:35 -6.730 154.845 10.0 BOUGAINVILLE REGION, PAPUA NEW GUINEA

ML1.7 2007/04/05 09:51:00 35.642 -120.926 5.8 11 km ( 7 mi) SSW of Lake Nacimiento, CA

---

12:00-15:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML2.1 2007/04/05 14:37:16 37.739 -122.559 3.7 5 km ( 3 mi) W of San Francisco Zoo
ML1.5 2007/04/05 14:32:09 34.028 -117.556 8.9 6 km ( 4 mi) W of Glen Avon, CA
ML1.5 2007/04/05 13:48:52 35.961 -120.508 3.9 10 km ( 6 mi) NW of Parkfield, CA

M5.1 2007/04/05 13:22:55 56.090 114.502 20.0 BURYATIYA, RUSSIA

ML1.6 2007/04/05 13:17:42 33.619 -116.642 5.0 8 km ( 5 mi) NNE of Anza, CA
ML2.1 2007/04/05 13:06:11 36.339 -117.993 0.2 4 km ( 2 mi) NE of Cartago, CA
ML1.1 2007/04/05 12:29:54 34.408 -116.484 5.8 32 km ( 20 mi) N of Yucca Valley, CA
ML2.4 2007/04/05 12:25:13 34.107 -117.322 18.2 4 km ( 2 mi) SW of San Bernardino, CA

---

15:00-18:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML2.0 2007/04/05 17:41:56 33.845 -118.236 17.0 2 km ( 1 mi) ENE of Carson, CA
ML1.7 2007/04/05 16:52:28 34.188 -117.471 7.6 7 km ( 5 mi) WSW of Devore, CA
ML1.1 2007/04/05 16:21:59 32.645 -115.675 9.5 16 km ( 10 mi) S of Seeley, CA
ML1.6 2007/04/05 16:19:37 37.883 -122.213 7.3 3 km ( 2 mi) W of Orinda, CA
ML1.4 2007/04/05 16:09:32 36.154 -117.930 4.2 12 km ( 8 mi) N of Coso Junction, CA

M4.8 2007/04/05 15:40:41 37.338 -24.577 10.0 AZORES ISLANDS REGION

---

18:00-21:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.3 2007/04/05 20:37:02 36.343 -115.373 4.0 21 km ( 13 mi) NW of Las Vegas, NV
ML1.6 2007/04/05 20:19:53 34.961 -119.069 16.4 12 km ( 8 mi) WSW of Wheeler Ridge, CA
ML1.2 2007/04/05 19:37:07 33.519 -116.536 18.2 13 km ( 8 mi) ESE of Anza, CA
ML1.8 2007/04/05 19:30:18 32.758 -115.445 15.4 8 km ( 5 mi) ENE of Heber, CA

M4.9 2007/04/05 19:22:34 -13.114 167.137 223.8 VANUATU

ML1.3 2007/04/05 18:47:58 35.805 -117.542 0.0 15 km ( 9 mi) WNW of Searles Valley, CA
ML1.6 2007/04/05 18:35:41 32.646 -115.675 9.3 16 km ( 10 mi) S of Seeley, CA

---

21:00-24:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.4 2007/04/05 23:20:04 36.018 -120.608 0.2 21 km ( 13 mi) NW of Parkfield, CA
ML1.6 2007/04/05 23:15:46 38.778 -117.111 4.0 43 km ( 27 mi) SSE of Washington, NV

ML4.1 2007/04/05 22:54:29 40.311 -124.578 18.8 25 km ( 15 mi) W of Petrolia, CA

M4.9 2007/04/05 22:45:19 37.147 -24.535 10.0 AZORES ISLANDS REGION

ML1.5 2007/04/05 22:23:53 34.397 -116.498 9.0 31 km ( 19 mi) NNW of Yucca Valley, CA
ML1.5 2007/04/05 21:57:28 35.309 -118.581 7.0 8 km ( 5 mi) N of Keene, CA
ML1.4 2007/04/05 21:32:59 35.975 -115.114 8.0 10 km ( 6 mi) SE of Enterprise, NV
ML1.6 2007/04/05 21:31:16 33.843 -117.488 1.5 8 km ( 5 mi) ESE of Corona, CA
ML1.1 2007/04/05 21:23:42 36.015 -117.802 2.8 14 km ( 8 mi) ESE of Coso Junction, CA
ML1.6 2007/04/05 21:02:00 39.237 -123.114 8.4 12 km ( 8 mi) NNE of Talmage, CA

---

April 6, 2007

Peak Crustal Resonant Frequency = 0.64 Hz (-67.17 dBv)

00:00-03:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.5 2007/04/06 01:25:40 33.194 -115.583 5.0 6 km ( 3 mi) ENE of Obsidian Butte, CA
ML1.4 2007/04/06 00:23:36 36.912 -121.268 6.6 14 km ( 9 mi) ENE of Hollister, CA

---

03:00-06:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

M5.6 2007/04/06 05:54:20 -55.525 -123.593 10.0 SOUTHERN EAST PACIFIC RISE

ML1.9 2007/04/06 05:23:15 37.537 -118.795 14.3 11 km ( 7 mi) WSW of Toms Place, CA
ML1.5 2007/04/06 03:54:42 34.410 -116.486 5.6 32 km ( 20 mi) N of Yucca Valley, CA
ML1.3 2007/04/06 03:37:43 33.246 -116.026 6.1 8 km ( 5 mi) SW of Salton City, CA
ML1.6 2007/04/06 03:09:49 39.451 -123.115 1.8 14 km ( 9 mi) WNW of Lake Pillsbury, CA

---

06:00-09:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.7 2007/04/06 08:55:09 33.158 -116.122 11.6 2 km ( 1 mi) NNE of Ocotillo Wells, CA
ML2.3 2007/04/06 08:54:28 33.164 -116.116 12.5 3 km ( 2 mi) NNE of Ocotillo Wells, CA
ML1.5 2007/04/06 07:14:46 38.825 -122.787 1.9 3 km ( 2 mi) NNE of The Geysers, CA

M5.2 2007/04/06 06:20:14 -23.548 170.204 32.4 SOUTHEAST OF THE LOYALTY ISLANDS
M5.0 2007/04/06 06:10:54 37.277 -24.607 10.0 AZORES ISLANDS REGION

---

09:00-12:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML4.0 2007/04/06 11:47:06 51.700 -179.323 15.0 ANDREANOF ISLANDS, ALEUTIAN IS., ALASKA

ML1.4 2007/04/06 11:38:20 34.120 -117.451 6.9 3 km ( 2 mi) NNE of Fontana, CA

M4.6 2007/04/06 11:11:49 -23.049 -68.328 101.7 ANTOFAGASTA, CHILE

ML1.2 2007/04/06 10:47:10 36.093 -117.850 4.2 10 km ( 6 mi) ENE of Coso Junction, CA
ML1.5 2007/04/06 10:02:47 38.822 -122.826 1.2 3 km ( 2 mi) NNW of The Geysers, CA

ML4.9 2007/04/06 10:02:04 51.739 -179.268 10.0 ANDREANOF ISLANDS, ALEUTIAN IS., ALASKA

ML1.8 2007/04/06 09:52:30 38.812 -122.793 3.2 2 km ( 1 mi) NE of The Geysers, CA
ML1.1 2007/04/06 09:48:11 40.178 -119.456 8.0 24 km ( 15 mi) E of Zenobia, NV

M5.5 2007/04/06 09:12:20 -8.379 157.049 10.0 SOLOMON ISLANDS

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12:00-15:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.3 2007/04/06 14:24:58 34.555 -116.512 5.6 37 km ( 23 mi) WSW of Ludlow, CA

M5.4 2007/04/06 14:08:56 -16.850 -71.142 30.0 SOUTHERN PERU

ML1.8 2007/04/06 13:55:12 34.881 -116.350 4.0 25 km ( 15 mi) NW of Ludlow, CA
ML1.6 2007/04/06 13:31:01 40.071 -121.002 11.3 3 km ( 2 mi) NW of Indian Falls, CA

ML4.2 2007/04/06 12:38:15 51.128 -179.341 1.8 ANDREANOF ISLANDS, ALEUTIAN IS., ALASKA

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15:00-18:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.8 2007/04/06 17:08:29 38.717 -117.112 0.0 50 km ( 31 mi) SSE of Washington, NV
ML2.1 2007/04/06 16:13:04 33.655 -116.718 17.7 10 km ( 6 mi) S of Idyllwild, CA
ML1.6 2007/04/06 15:28:03 32.598 -115.725 6.4 22 km ( 14 mi) S of Seeley, CA

M5.0 2007/04/06 15:21:40 37.295 -24.657 10.0 AZORES ISLANDS REGION

ML1.8 2007/04/06 15:14:24 34.413 -116.483 5.6 32 km ( 20 mi) N of Yucca Valley, CA

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18:00-21:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.2 2007/04/06 19:53:25 33.973 -116.981 7.0 5 km ( 3 mi) N of Beaumont, CA
ML2.5 2007/04/06 19:47:48 40.709 -124.185 15.4 3 km ( 2 mi) SSE of Humboldt Hill, CA

M5.0 2007/04/06 19:40:51 -7.851 155.785 10.0 SOLOMON ISLANDS

ML1.4 2007/04/06 19:27:37 38.794 -122.799 4.3 1 km ( 0 mi) ESE of The Geysers, CA

ML3.3 2007/04/06 19:25:45 40.704 -124.193 18.5 3 km ( 2 mi) SSE of Humboldt Hill, CA

ML1.9 2007/04/06 18:59:30 32.611 -116.982 0.0 6 km ( 4 mi) ESE of Chula Vista, CA

M4.5 2007/04/06 18:49:12 67.820 -18.762 10.0 ICELAND REGION
M5.9 2007/04/06 18:48:13 -6.960 155.767 10.0 BOUGAINVILLE REGION, PAPUA NEW GUINEA
M4.8 2007/04/06 18:23:53 -7.923 130.298 10.0 KEPULAUAN TANIMBAR REGION, INDONESIA

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21:00-24:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.2 2007/04/06 23:25:52 38.826 -122.793 3.0 3 km ( 2 mi) NNE of The Geysers, CA
ML2.1 2007/04/06 21:47:48 39.323 -123.273 2.9 11 km ( 7 mi) SE of Willits, CA
ML1.5 2007/04/06 21:27:37 38.838 -122.807 2.6 4 km ( 3 mi) N of The Geysers, CA

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April 7, 2007

24 Hour Peak Crustal Resonant Frequency = 0.56 Hz (-66.40 dBv)

00:00-03:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.7 2007/04/07 02:50:29 33.942 -117.727 15.3 4 km ( 2 mi) S of Chino Hills, CA
ML1.3 2007/04/07 02:08:56 37.537 -121.692 4.9 18 km ( 11 mi) SSE of Livermore, CA

M5.2 2007/04/07 01:21:43 30.829 141.753 35.0 IZU ISLANDS, JAPAN REGION

ML2.3 2007/04/07 00:41:10 40.693 -124.112 8.1 7 km ( 4 mi) SE of Pine Hills, CA

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03:00-06:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.0 2007/04/07 05:46:03 34.007 -116.310 7.4 13 km ( 8 mi) S of Joshua Tree, CA

M5.1 2007/04/07 05:20:50 -39.774 46.158 10.0 SOUTHWEST INDIAN RIDGE

ML1.4 2007/04/07 04:41:58 36.591 -121.108 5.0 7 km ( 5 mi) NNE of Pinnacles, CA

M5.2 2007/04/07 04:41:25 -28.058 -176.760 38.6 KERMADEC ISLANDS REGION

ML1.0 2007/04/07 04:40:22 33.502 -116.567 14.6 11 km ( 7 mi) ESE of Anza, CA
ML1.2 2007/04/07 04:23:05 37.408 -121.755 7.8 8 km ( 5 mi) NE of Alum Rock, CA
ML2.4 2007/04/07 04:01:18 38.791 -122.743 3.8 5 km ( 3 mi) WNW of Anderson Springs, CA
ML2.1 2007/04/07 03:55:53 38.091 -122.832 11.2 1 km ( 1 mi) E of Inverness, CA
ML1.8 2007/04/07 03:55:23 36.980 -121.835 4.7 2 km ( 1 mi) N of Aptos Hills-Larkin Valley, CA
ML2.8 2007/04/07 03:13:58 34.524 -118.094 9.3 6 km ( 4 mi) S of Palmdale, CA

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06:00-09:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.2 2007/04/07 08:56:44 37.595 -118.481 7.6 18 km ( 11 mi) ENE of Toms Place, CA

M5.2 2007/04/07 08:30:14 -20.906 168.637 37.3 LOYALTY ISLANDS
M5.0 2007/04/07 08:20:21 -21.073 168.605 35.7 LOYALTY ISLANDS

ML2.1 2007/04/07 07:39:14 39.219 -123.494 2.6 23 km ( 15 mi) E of Navarro Head, CA

M6.0 2007/04/07 07:09:26 37.360 -24.501 10.0 AZORES ISLANDS REGION

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09:00-12:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.0 2007/04/07 11:02:28 33.327 -116.229 11.7 16 km ( 10 mi) NE of Borrego Springs, CA

M5.7 2007/04/07 09:51:52 2.926 95.738 30.0 SIMEULUE, INDONESIA

ML1.9 2007/04/07 09:29:52 33.862 -116.840 17.5 9 km ( 5 mi) SW of Cabazon, CA

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12:00-15:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.6 2007/04/07 14:57:17 33.657 -116.728 21.8 10 km ( 6 mi) S of Idyllwild, CA
ML1.9 2007/04/07 14:22:52 34.569 -118.043 8.9 5 km ( 3 mi) ESE of Palmdale, CA
ML1.8 2007/04/07 13:15:32 38.813 -122.801 2.3 2 km ( 1 mi) NNE of The Geysers, CA
ML1.4 2007/04/07 12:20:18 34.487 -118.568 14.9 6 km ( 4 mi) SE of Castaic Lake dam, CA
ML1.5 2007/04/07 12:17:23 38.812 -122.828 3.2 2 km ( 2 mi) NW of The Geysers, CA

---

15:00-18:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.1 2007/04/07 16:28:14 36.548 -121.113 8.3 3 km ( 2 mi) NE of Pinnacles, CA
ML1.2 2007/04/07 16:09:38 38.795 -122.805 3.9 0 km ( 0 mi) SSE of The Geysers, CA
ML2.4 2007/04/07 15:18:56 38.812 -122.816 3.4 2 km ( 1 mi) NNW of The Geysers, CA

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18:00-21:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.8 2007/04/07 19:33:30 35.911 -120.664 5.4 14 km ( 8 mi) ENE of Bradley, CA
ML2.1 2007/04/07 19:29:58 32.674 -116.212 10.3 21 km ( 13 mi) WSW of Ocotillo, CA
ML1.9 2007/04/07 19:17:20 34.507 -118.107 11.8 8 km ( 5 mi) ENE of Acton, CA
ML2.2 2007/04/07 18:51:54 38.772 -122.717 1.3 2 km ( 1 mi) W of Anderson Springs, CA

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21:00-24:00 UTC

Return to Table of Contents Caption: Infrasonic Resonant Harmonic Activity, which was detected and inferred to be associated with building deep crustal stress along the Pacific-North American Plate Boundary in Southern California.

ANSS Seismic Catalog: CA/NV/BAJA & Regions with Special Interest

MAG   DATE   UTC-TIME         LAT   LON   DEPTH   LOCATION
            y/m/d         h:m:s           deg     deg     km

---

ML1.6 2007/04/07 23:56:23 38.080 -117.911 0.0 26 km ( 16 mi) SE of Tonopah Junction, NV

ML4.2 2007/04/07 23:55:03 40.615 -124.752 7.6 42 km ( 26 mi) W of Ferndale, CA

ML2.7 2007/04/07 23:09:41 35.532 -118.460 9.0 12 km ( 7 mi) S of town of Lake Isabella, CA
ML1.4 2007/04/07 22:31:42 32.648 -116.050 10.6 11 km ( 7 mi) SSW of Ocotillo, CA
ML1.6 2007/04/07 22:18:30 33.786 -117.427 8.8 12 km ( 8 mi) SSW of Woodcrest, CA
ML1.5 2007/04/07 21:22:48 34.318 -116.465 2.4 22 km ( 14 mi) NNW of Yucca Valley, CA
ML1.4 2007/04/07 21:13:39 38.793 -122.748 4.3 5 km ( 3 mi) E of The Geysers, CA

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Frank Condon

Independent Earthquake Precursor Research Consultant

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