GeoSeismic Labs Reports: April 2007

April 8-14, 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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The 24 hour (Daily) Peak Resonant Infrasonic Resonant Harmonic Frequency. Since Late October 2006, a significant trend has developed within the Fundamental Harmonic Energy which indicates a Major Crustal Stress Point now exists in the Gulf of California Baja, Mexico.

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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 8, 2007
• All Infrasonic Spectrograms Captured on.......................................
  April 9, 2007
• All Infrasonic Spectrograms Captured on.....................................
  April 10, 2007
• All Infrasonic Spectrograms Captured on.....................................
  April 11, 2007
• All Infrasonic Spectrograms Captured on.....................................
  Apri 12, 2007
• All Infrasonic Spectrograms Captured on.....................................
  April 13, 2007
• All Infrasonic Spectrograms Captured on.....................................
  April 14, 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 M6.1 Earthquake ........................................
  April 7, 2007
• The Guerrero, Mexico M6.0 Earthquake ...............................
  April 13, 2007
• The So. East Pacific Rise M5.8 Earthquake ..........................
  April 13, 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
• The Solomon Islands M4.7 Earthquake ......................................
  April 8, 2007
• The Solomon Islands M4.8 Earthquake ......................................
  April 8, 2007
• The Solomon Islands M4.7 Earthquake ......................................
  April 8, 2007
• The Solomon Islands M4.8 Earthquake ......................................
  April 8, 2007
• The Fiji Islands Region M4.9 Earthquake .................................
  April 9, 2007
• The Fiji Islands Region M4.6 Earthquake .................................
  April 9, 2007
• The Loyalty Islands M4.7 Earthquake .....................................
  April 11, 2007
• The Solomon Islands M4.6 Earthquake ...................................
  April 11, 2007
• The Tonga Region M5.4 Earthquake .......................................
  April 11, 2007
• The Loyalty Islands M5.2 Earthquake ....................................
  April 11, 2007
• The Solomon Islands M4.7 Earthquake ...................................
  April 11, 2007
• The Tonga Region M4.8 Earthquake .......................................
  April 12, 2007
• The Loyalty Islands M5.3 Earthquake ....................................
  April 12, 2007
• The Vanuatu Region M5.1 Earthquake ...................................
  April 12, 2007
• The Fiji Islands Region M5.2 Earthquake ..............................
  April 13, 2007
• The Solomon Islands M4.6 Earthquake ...................................
  April 13, 2007
• The Loyalty Islands M4.9 Earthquake ....................................
  April 14, 2007

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North American Earthquakes of Special Interest

• The Oaxaca, Mexico M4.0 Earthquake ........................................
  April 1, 2007
• The Maupin, OR M3.1 Earthquake ..............................................
  April 8, 2007
• The Guerrero, Mexico M6.0 Earthquake .................................
  April 13, 2007
• The Guerrero, Mexico M5.4 Earthquake .................................
  April 13, 2007
• The Michoacan, Mexico M4.8 Earthquake ...............................
  April 13, 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
• The Helene, NV M3.0 Earthquake ........................................
  April 10, 2007
• The Casa Conejo, CA M3.4 Earthquake ..............................
  April 10, 2007
• The Toms Place, CA M3.0 Earthquake ................................
  April 11, 2007
• The Tres Pinos, CA M3.1 Earthquake .................................
  April 12, 2007
• The Round Mountain, CA M3.1 Earthquake ......................
  April 13, 2007
• The Toms Place, CA M3.1 Earthquake ............. .................
  April 13, 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   December 2004,
  October 2005.   September 2006, and most recently   April 2007.

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 8, 2007

24 Hour Peak Crustal Resonant Frequency = 0.54 Hz (-66.22 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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ML2.3 2007/04/08 02:18:22 38.824 -122.782 3.9 4 km ( 2 mi) NE of The Geysers, CA
ML1.5 2007/04/08 01:34:25 33.805 -115.805 10.9 31 km ( 19 mi) W of Eagle Mtn., 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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ML1.6 2007/04/08 05:22:04 33.161 -116.027 17.2 10 km ( 6 mi) ENE of Ocotillo Wells, CA
ML1.6 2007/04/08 05:20:29 33.163 -116.059 0.8 7 km ( 4 mi) ENE of Ocotillo Wells, CA

M4.9 2007/04/08 04:48:18 -4.639 102.671 15.0 SOUTHERN SUMATRA, INDONESIA
M4.7 2007/04/08 04:14:11 -7.716 155.618 30.0 SOLOMON ISLANDS

ML1.0 2007/04/08 04:01:09 33.472 -116.491 5.2 19 km ( 12 mi) ESE of Anza, CA

M4.8 2007/04/08 03:42:50 -7.080 155.933 10.0 SOLOMON ISLANDS
M4.2 2007/04/08 03:38:03 5.664 93.234 30.0 OFF THE WEST COAST OF NORTHERN SUMATRA
M5.2 2007/04/08 03:21:59 49.279 155.484 10.0 KURIL ISLANDS

ML2.6 2007/04/08 03:21:57 33.163 -116.056 3.1 7 km ( 5 mi) ENE of Ocotillo Wells, 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

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ML1.0 2007/04/08 08:31:58 35.460 -120.813 13.5 7 km ( 5 mi) ENE of Cayucos, CA
ML1.3 2007/04/08 08:11:42 34.100 -116.736 6.9 8 km ( 5 mi) E of Mt. San Gorgonio, CA
ML1.5 2007/04/08 06:50:29 36.237 -120.810 5.8 22 km ( 14 mi) ENE of San Lucas, CA
ML1.5 2007/04/08 06:45:47 36.745 -121.338 7.7 5 km ( 3 mi) SSW of Tres Pinos, 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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M4.8 2007/04/08 11:51:16 -17.624 -72.797 45.6 NEAR THE COAST OF SOUTHERN PERU

ML1.8 2007/04/08 11:49:02 38.806 -122.770 2.0 3 km ( 2 mi) ENE of The Geysers, CA

M4.3 2007/04/08 11:22:21 30.940 56.820 10.6 CENTRAL IRAN

ML2.6 2007/04/08 10:39:58 36.595 -121.199 7.2 9 km ( 5 mi) NW of Pinnacles, CA

M4.8 2007/04/08 10:24:05 37.196 -24.622 10.0 AZORES ISLANDS REGION

ML1.6 2007/04/08 10:07:32 34.031 -116.795 11.5 8 km ( 5 mi) SSE of Mt. San Gorgonio, CA
ML1.8 2007/04/08 10:00:30 38.228 -121.784 20.6 11 km ( 7 mi) NW of Rio Vista, CA
ML1.4 2007/04/08 09:48:06 34.587 -119.147 0.0 18 km ( 11 mi) NNE of Ojai, CA

ML3.1 2007/04/08 09:40:41 45.126 -120.936 23.1 13 km ( 8 mi) ESE of Maupin, OR

ML1.5 2007/04/08 09:36:56 33.172 -116.055 7.1 8 km ( 5 mi) ENE of Ocotillo Wells, C

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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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M5.2 2007/04/08 14:47:18 37.293 -24.526 10.0 AZORES ISLANDS REGION

ML1.3 2007/04/08 14:22:17 37.502 -118.844 9.4 16 km ( 10 mi) WSW of Toms Place, CA

M4.7 2007/04/08 14:10:50 -20.561 168.863 10.0 LOYALTY ISLANDS
M4.5 2007/04/08 13:48:51 22.726 145.756 41.6 VOLCANO ISLANDS, JAPAN REGION
M5.0 2007/04/08 13:28:17 -17.431 -72.818 29.8 NEAR THE COAST OF SOUTHERN PERU
M4.8 2007/04/08 13:25:29 -17.565 -72.784 32.5 NEAR THE COAST OF SOUTHERN PERU
M4.7 2007/04/08 12:58:16 22.804 145.708 41.7 VOLCANO ISLANDS, JAPAN REGION
M4.9 2007/04/08 12:52:14 22.823 145.641 40.0 VOLCANO ISLANDS, JAPAN REGION

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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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ML1.3 2007/04/08 16:19:21 37.433 -117.079 0.0 22 km ( 13 mi) NE of Tokop, NV

ML4.7 2007/04/08 16:08:56 19.064 -67.594 9.9 84 km ( 52 mi) NW of Cabán, PR

ML1.4 2007/04/08 15:39:05 33.664 -116.716 22.9 9 km ( 6 mi) S of Idyllwild, CA
ML1.6 2007/04/08 15:36:36 32.698 -116.060 10.8 7 km ( 5 mi) SW of Ocotillo, CA

M5.1 2007/04/08 15:11:35 -30.218 -178.704 153.8 KERMADEC ISLANDS, NEW ZEALAND
M4.8 2007/04/08 15:10:28 -7.075 155.956 10.0 SOLOMON 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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M 5.2 2007/04/08 20:38:02 37.305 -24.524 10.0 AZORES ISLANDS REGION

ML1.4 2007/04/08 20:33:18 32.670 -115.861 7.4 15 km ( 9 mi) ESE of Ocotillo, CA
ML1.5 2007/04/08 20:21:12 38.831 -122.799 1.9 4 km ( 2 mi) N of The Geysers, CA

M5.0 2007/04/08 20:10:41 -6.776 155.689 10.0 BOUGAINVILLE REGION, PAPUA NEW GUINEA

ML1.5 2007/04/08 19:59:41 33.769 -117.209 8.0 3 km ( 2 mi) SSE of Perris, CA

M4.7 2007/04/08 19:57:51 37.360 71.543 150.0 TAJIKISTAN

ML3.7 2007/04/08 19:45:38 18.931 -67.721 14.2 81 km ( 51 mi) NW of Aguadilla, PR

ML2.7 2007/04/08 19:01:57 38.541 -122.771 3.6 3 km ( 2 mi) ESE of Windsor, CA

M5.0 2007/04/08 18:25:59 37.250 -24.205 10.0 AZORES ISLANDS 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

---

ML2.5 2007/04/08 23:50:10 37.192 -121.583 5.7 9 km ( 6 mi) NE of Morgan Hill, CA

M4.8 2007/04/08 23:11:16 14.414 53.837 10.0 OWEN FRACTURE ZONE REGION

ML4.5 2007/04/08 22:09:40 59.172 -144.963 9.2 GULF OF ALASKA

ML1.5 2007/04/08 21:23:21 33.250 -116.088 7.1 13 km ( 8 mi) NNE of Ocotillo Wells, CA

---

April 9, 2007

24 Hour Peak Crustal Resonant Frequency = 0.56 Hz (-66.25 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

---

ML1.4 2007/04/09 02:54:23 38.800 -122.751 2.5 5 km ( 3 mi) SSW of Cobb, CA

M4.9 2007/04/09 02:24:29 -20.030 -178.160 594.6 FIJI REGION

ML1.5 2007/04/09 02:17:59 34.040 -116.925 17.9 11 km ( 7 mi) SW of Mt. San Gorgonio, CA
ML2.2 2007/04/09 01:27:30 32.913 -115.515 21.3 7 km ( 5 mi) SSE of Brawley, CA
ML1.7 2007/04/09 01:27:22 32.925 -115.525 19.4 6 km ( 4 mi) S of Brawley, CA

M5.4 2007/04/09 00:58:23 -6.868 155.856 35.0 BOUGAINVILLE REGION, PAPUA NEW GUINEA

ML1.9 2007/04/09 00:58:16 32.914 -115.512 21.7 7 km ( 5 mi) SSE of Brawley, 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

ML2.1 2007/04/09 05:37:32 32.156 -115.438 6.0 34 km ( 21 mi) WSW of Guadalupe Victoria, Mexico
ML1.2 2007/04/09 03:59:03 33.977 -116.842 16.4 7 km ( 4 mi) NE of Banning, CA
ML1.9 2007/04/09 03:47:43 35.707 -121.090 10.0 11 km ( 7 mi) NE of San Simeon, CA
ML1.2 2007/04/09 03:46:12 36.029 -117.772 3.5 16 km ( 10 mi) E of Coso Junction, CA
ML1.0 2007/04/09 03:43:33 36.024 -117.763 2.1 17 km ( 10 mi) E of Coso Junction, CA
ML1.1 2007/04/09 03:28:04 36.032 -117.788 0.0 14 km ( 9 mi) E of Coso Junction, 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

---

M5.1 2007/04/09 08:32:24 37.231 -24.534 10.0 AZORES ISLANDS REGION

ML2.9 2007/04/09 07:16:57 31.780 -115.700 6.0 41 km ( 26 mi) N of Lázaro Cárdenas, Mexico
ML1.1 2007/04/09 06:38:43 33.974 -116.956 17.9 6 km ( 4 mi) NNE of Beaumont, CA
ML1.1 2007/04/09 06:22:14 36.673 -115.837 0.0 18 km ( 11 mi) NW of Indian Springs, NV
ML1.9 2007/04/09 06:15:04 38.824 -122.791 3.7 3 km ( 2 mi) NNE of The Geysers, 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

---

ML2.3 2007/04/09 11:42:20 37.500 -121.821 4.5 10 km ( 6 mi) NE of Milpitas, CA
ML1.8 2007/04/09 11:25:07 37.865 -122.238 9.5 3 km ( 2 mi) ESE of Berkeley, CA
ML2.3 2007/04/09 11:01:49 37.451 -118.843 8.3 19 km ( 12 mi) SW of Toms Place, CA

M5.8 2007/04/09 10:18:05 48.367 154.653 36.2 KURIL ISLANDS

ML1.1 2007/04/09 10:14:08 33.678 -116.800 18.1 11 km ( 7 mi) SW of Idyllwild, CA
ML1.5 2007/04/09 09:44:43 36.745 -121.340 7.6 5 km ( 3 mi) SSW of Tres Pinos, CA

M4.6 2007/04/09 09:31:21 -23.480 179.957 523.2 SOUTH OF THE FIJI 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

---

ML1.4 2007/04/09 14:53:07 37.397 -117.660 0.0 6 km ( 3 mi) E of Sylvania, NV
ML2.1 2007/04/09 14:52:49 37.974 -118.723 8.9 35 km ( 22 mi) E of Lee Vining, CA
ML1.7 2007/04/09 14:35:18 33.032 -116.537 15.3 6 km ( 4 mi) SE of Julian, CA
ML1.9 2007/04/09 14:34:59 39.586 -123.334 3.3 17 km ( 10 mi) SE of Laytonville, CA

ML3.2 2007/04/09 14:34:58 18.944 -67.740 5.0 84 km ( 52 mi) NW of Aguadilla, PR

ML1.6 2007/04/09 13:38:14 38.732 -119.583 12.0 19 km ( 12 mi) ENE of Markleeville, CA

M4.6 2007/04/09 13:25:34 37.357 -24.838 35.0 AZORES ISLANDS REGION

ML1.6 2007/04/09 12:46:41 34.396 -117.678 9.5 6 km ( 4 mi) NW of Wrightwood, CA
ML2.2 2007/04/09 12:32:56 38.358 -122.162 3.3 11 km ( 7 mi) N of Green Valley, CA
ML1.3 2007/04/09 12:18:10 37.456 -117.382 8.0 20 km ( 13 mi) NNW of Tokop, NV
ML2.2 2007/04/09 12:17:49 37.975 -118.723 8.4 35 km ( 22 mi) E of Lee Vining, 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

---

ML1.3 2007/04/09 17:17:45 37.525 -118.824 6.8 13 km ( 8 mi) WSW of Toms Place, CA
ML1.1 2007/04/09 16:45:51 37.524 -118.822 5.9 13 km ( 8 mi) WSW of Toms Place, CA
ML1.6 2007/04/09 16:40:20 33.602 -116.541 14.1 13 km ( 8 mi) ENE of Anza, CA

M4.4 2007/04/09 16:23:40 35.661 89.369 43.0 WESTERN XIZANG

ML1.7 2007/04/09 15:52:42 33.640 -117.805 8.6 4 km ( 3 mi) NE of San Joaquin Hills, 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

---

ML1.7 2007/04/09 20:37:52 36.744 -121.339 8.2 5 km ( 3 mi) SSW of Tres Pinos, CA
ML1.3 2007/04/09 18:55:39 36.826 -121.418 11.8 3 km ( 2 mi) SW of Hollister, CA
ML1.2 2007/04/09 18:37:53 37.669 -122.077 6.9 2 km ( 1 mi) WSW of Fairview, 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

---

ML1.1 2007/04/09 23:45:55 33.347 -116.355 15.6 11 km ( 7 mi) N of Borrego Springs, CA
ML2.0 2007/04/09 23:38:07 37.976 -118.720 7.9 35 km ( 22 mi) E of Lee Vining, CA
ML2.5 2007/04/09 22:47:35 38.828 -122.798 1.8 3 km ( 2 mi) NNE of The Geysers, CA
ML1.0 2007/04/09 21:56:59 37.900 -122.105 13.1 1 km ( 1 mi) NNE of Lafayette, CA
ML1.0 2007/04/09 21:49:59 33.681 -116.739 16.8 7 km ( 5 mi) SSW of Idyllwild, CA
ML1.2 2007/04/09 21:49:29 33.671 -116.740 14.1 9 km ( 5 mi) SSW of Idyllwild, CA

---

April 10, 2007

24 Hour Peak Crustal Resonant Frequency = 0.55 Hz (-66.24 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

---

ML2.7 2007/04/10 01:40:30 37.972 -118.722 7.7 35 km ( 22 mi) E of Lee Vining, CA
ML1.6 2007/04/10 01:28:38 38.271 -116.632 0.0 25 km ( 15 mi) WNW of Warm Springs, NV

---

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

---

ML2.0 2007/04/10 04:46:55 38.818 -122.794 3.2 2 km ( 2 mi) NNE of The Geysers, CA
ML1.4 2007/04/10 04:42:58 34.004 -116.837 20.8 10 km ( 6 mi) NE of Banning, CA
ML1.7 2007/04/10 04:22:32 38.800 -122.812 3.3 0 km ( 0 mi) WNW of The Geysers, CA
ML1.8 2007/04/10 03:42:01 37.971 -118.722 8.6 35 km ( 22 mi) E of Lee Vining, CA

M5.0 2007/04/10 03:17:57 38.615 21.599 10.0 GREECE

ML1.1 2007/04/10 03:03:09 36.026 -117.787 4.5 15 km ( 9 mi) E of Coso Junction, 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 2007/04/10 08:50:36 35.307 -118.555 4.4 8 km ( 5 mi) NNE of Keene, CA
ML1.4 2007/04/10 08:44:56 36.744 -121.338 7.7 5 km ( 3 mi) SSW of Tres Pinos, CA

ML3.0 2007/04/10 07:35:30 18.054 -66.046 7.6 4 km ( 2 mi) NNE of Yaurel, PR

ML2.0 2007/04/10 07:32:24 34.721 -116.404 3.3 22 km ( 14 mi) W of Ludlow, CA

M5.2 2007/04/10 07:15:44 38.784 21.422 10.0 GREECE
M5.1 2007/04/10 07:13:07 38.722 21.724 20.0 GREECE

ML2.7 2007/04/10 06:53:32 40.302 -124.527 20.9 21 km ( 13 mi) W of Petrolia, CA
ML1.6 2007/04/10 06:39:54 38.833 -122.800 2.2 4 km ( 2 mi) N of The Geysers, 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

---

ML1.9 2007/04/10 11:05:09 37.971 -118.724 8.3 35 km ( 22 mi) E of Lee Vining, CA

ML3.0 2007/04/10 10:58:37 37.353 -114.809 16.8 15 km ( 9 mi) SSW of Helene, NV

ML1.4 2007/04/10 10:52:35 45.116 -120.934 13.6 13 km ( 8 mi) ESE of Maupin, OR

M5.0 2007/04/10 10:41:03 38.914 21.688 10.0 GREECE

ML1.0 2007/04/10 10:40:11 33.722 -116.767 17.1 6 km ( 3 mi) WSW of Idyllwild, CA
ML2.2 2007/04/10 10:14:02 35.642 -121.074 4.2 10 km ( 6 mi) N of Cambria, 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

---

ML1.3 2007/04/10 14:47:15 35.834 -117.598 3.3 21 km ( 13 mi) WNW of Searles Valley, CA

M5.5 2007/04/10 13:56:53 13.000 92.598 22.4 ANDAMAN ISLANDS, INDIA REGION

ML3.4 2007/04/10 13:27:24 34.070 -118.952 15.4 13 km ( 8 mi) S of Casa Conejo, CA

ML1.7 2007/04/10 12:36:49 33.196 -115.600 3.8 4 km ( 3 mi) NE of Obsidian Butte, 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

---

ML2.6 2007/04/10 17:55:36 40.228 -121.136 0.0 3 km ( 2 mi) NE of Prattville, CA
ML1.2 2007/04/10 17:35:56 38.219 -118.678 0.0 17 km ( 10 mi) SW of Qualeys Camp, NV
ML1.3 2007/04/10 17:11:30 33.409 -116.338 15.5 18 km ( 11 mi) N of Borrego Springs, CA

M4.6 2007/04/10 17:05:28 -15.858 -73.361 73.1 SOUTHERN PERU
M5.2 2007/04/10 16:45:49 11.706 -86.381 148.6 NEAR THE COAST OF NICARAGUA

ML4.5 2007/04/10 16:34:21 69.733 -144.685 5.0 NORTHERN ALASKA

ML1.7 2007/04/10 16:23:35 38.806 -122.796 2.9 1 km ( 1 mi) NE of The Geysers, CA

M4.7 2007/04/10 16:15:52 -6.126 106.414 174.7 JAVA, INDONESIA

ML3.2 2007/04/10 16:09:59 18.853 -67.709 109.8 75 km ( 46 mi) NW of Rincón, PR

M4.8 2007/04/10 15:22:43 46.670 155.984 10.0 EAST OF THE KURIL ISLANDS

ML1.6 2007/04/10 15:22:03 34.284 -118.503 15.7 1 km ( 1 mi) N of Granada Hills, 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

---

ML1.7 2007/04/10 20:20:32 37.973 -118.722 7.7 35 km ( 22 mi) E of Lee Vining, CA
ML1.8 2007/04/10 19:34:12 35.049 -118.316 0.0 12 km ( 7 mi) WNW of Mojave, CA

M4.0 2007/04/10 19:17:34 37.207 12.979 10.0 SICILY, ITALY
M4.5 2007/04/10 18:28:06 -3.887 128.986 50.0 SERAM, INDONESIA
M4.6 2007/04/10 18:20:22 11.565 126.109 63.5 PHILIPPINE ISLANDS REG

---

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

---

ML1.7 2007/04/10 23:31:55 35.040 -117.676 0.0 3 km ( 2 mi) NNW of Boron, CA
ML1.4 2007/04/10 23:08:44 35.889 -120.443 9.7 2 km ( 1 mi) SW of Parkfield, CA
ML1.9 2007/04/10 22:46:46 34.124 -117.480 7.9 4 km ( 2 mi) NW of Fontana, CA
ML1.3 2007/04/10 22:18:46 35.676 -121.099 6.5 9 km ( 6 mi) ENE of San Simeon, CA

M4.7 2007/04/10 22:00:40 38.311 30.991 35.0 WESTERN TURKEY

ML1.3 2007/04/10 21:55:12 35.661 -121.102 7.1 8 km ( 5 mi) ENE of San Simeon, CA

M4.5 2007/04/10 21:39:20 37.952 30.918 21.8 WESTERN TURKEY

ML2.2 2007/04/10 21:38:31 36.553 -121.148 7.3 2 km ( 1 mi) N of Pinnacles, CA
ML2.3 2007/04/10 21:27:53 32.394 -115.086 7.0 12 km ( 7 mi) N of Guadalupe Victoria, Mexico

---

April 11, 2007

24 Hour Peak Crustal Resonant Frequency = 0.54 Hz (-65.93 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

---

M4.7 2007/04/11 02:52:57 -20.852 168.540 35.5 LOYALTY ISLANDS

ML1.3 2007/04/11 02:09:34 33.456 -116.630 10.0 12 km ( 7 mi) SSE of Anza, CA
ML1.3 2007/04/11 01:55:40 33.721 -116.845 16.5 6 km ( 4 mi) SE of Valle Vista, CA
ML1.5 2007/04/11 01:34:29 33.454 -116.628 10.5 12 km ( 7 mi) SSE of Anza, CA
ML1.3 2007/04/11 01:10:56 32.984 -116.461 11.9 15 km ( 9 mi) SE of Julian, 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 2007/04/11 05:58:19 36.456 -120.767 10.6 9 km ( 6 mi) WNW of New Idria, CA
ML1.4 2007/04/11 05:23:37 37.556 -115.836 16.0 21 km ( 13 mi) WSW of Tempiute, NV
ML1.0 2007/04/11 04:33:12 33.662 -117.001 9.3 9 km ( 6 mi) S of Hemet, CA
ML1.8 2007/04/11 04:24:46 37.971 -118.724 8.8 35 km ( 22 mi) E of Lee Vining, CA
ML1.8 2007/04/11 04:18:02 37.974 -118.722 7.4 35 km ( 22 mi) E of Lee Vining, CA
ML2.8 2007/04/11 04:17:08 37.972 -118.724 7.6 35 km ( 22 mi) E of Lee Vining, CA

M4.5 2007/04/11 03:59:52 -8.846 157.762 10.0 SOLOMON ISLANDS
M4.6 2007/04/11 03:21:14 -8.724 158.014 36.4 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

---

ML1.3 2007/04/11 08:16:03 35.876 -118.097 11.4 23 km ( 14 mi) SW of Coso Junction, CA
ML1.2 2007/04/11 07:41:48 33.397 -116.398 13.0 17 km ( 10 mi) N of Borrego Springs, CA
ML1.5 2007/04/11 06:52:46 34.088 -116.426 12.8 4 km ( 3 mi) SSW of Yucca Valley, CA

M4.9 2007/04/11 06:41:54 1.341 97.282 20.0 NIAS REGION, INDONESIA

ML3.7 2007/04/11 06:16:03 18.963 -67.694 2.6 82 km ( 51 mi) NW of Aguadilla, 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

---

ML2.4 2007/04/11 12:33:02 37.878 -122.253 10.4 2 km ( 1 mi) ENE of Berkeley, CA

M5.3 2007/04/11 10:30:58 46.559 153.448 10.0 KURIL ISLANDS
M4.6 2007/04/11 10:13:37 46.424 153.692 10.0 KURIL ISLANDS

ML1.7 2007/04/11 10:11:05 37.871 -122.241 9.6 3 km ( 2 mi) E of Berkeley, CA
ML2.0 2007/04/11 10:07:13 36.458 -120.766 10.4 9 km ( 6 mi) WNW of New Idria, CA
ML2.0 2007/04/11 10:02:31 36.461 -120.780 8.6 11 km ( 7 mi) WNW of New Idria, CA
ML1.4 2007/04/11 09:58:55 36.019 -120.606 2.4 20 km ( 13 mi) NW of Parkfield, CA
ML1.9 2007/04/11 09:22:38 34.016 -118.953 15.7 16 km ( 10 mi) W of Malibu, 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

---

ML1.0 2007/04/11 14:51:34 33.669 -116.722 15.5 8 km ( 5 mi) S of Idyllwild, CA
ML1.3 2007/04/11 14:00:01 37.778 -122.579 7.3 8 km ( 5 mi) NW of San Francisco Zoo
ML2.3 2007/04/11 13:15:12 39.260 -123.435 3.0 18 km ( 11 mi) SSW of Willits, CA
ML1.6 2007/04/11 13:14:48 36.574 -121.142 4.5 5 km ( 3 mi) N of Pinnacles, CA

M5.3 2007/04/11 12:45:55 13.101 125.977 35.0 PHILIPPINE ISLANDS REGION
M5.4 2007/04/11 12:41:43 -15.010 -173.483 35.0 TONGA

---

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 2007/04/11 17:24:10 33.700 -116.790 18.4 9 km ( 5 mi) SW of Idyllwild, CA
ML1.7 2007/04/11 17:24:10 33.717 -116.786 18.9 7 km ( 5 mi) WSW of Idyllwild, CA

M4.7 2007/04/11 17:13:07 -8.299 157.473 10.0 SOLOMON ISLANDS
M5.2 2007/04/11 16:26:37 -21.084 169.129 35.0 SOUTHEAST OF THE LOYALTY ISLANDS

---

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

---

ML2.8 2007/04/11 20:29:41 33.233 -116.104 14.2 10 km ( 6 mi) NNE of Ocotillo Wells, CA
ML1.8 2007/04/11 20:19:10 33.983 -116.574 5.8 7 km ( 4 mi) WNW of Desert Hot Springs, CA
ML2.1 2007/04/11 19:15:55 38.677 -117.061 0.0 55 km ( 34 mi) SSE of Washington, NV
ML1.7 2007/04/11 18:41:53 36.458 -114.470 0.0 10 km ( 6 mi) NNW of Stewarts Point, NV
ML1.8 2007/04/11 18:13:06 40.399 -119.408 0.0 23 km ( 14 mi) ESE of Smoke Creek, 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

---

ML3.0 2007/04/11 23:56:55 37.477 -118.838 4.6 17 km ( 10 mi) SW of Toms Place, CA

ML2.2 2007/04/11 22:44:36 33.824 -116.771 18.7 9 km ( 6 mi) S of Cabazon, CA
ML2.3 2007/04/11 21:59:22 33.716 -116.725 18.2 3 km ( 2 mi) SSW of Idyllwild, CA
ML2.1 2007/04/11 21:41:35 34.080 -117.270 7.0 4 km ( 2 mi) NNW of Loma Linda, CA
ML1.9 2007/04/11 21:36:07 38.455 -116.936 0.0 50 km ( 31 mi) NNE of Tonopah, NV
ML1.7 2007/04/11 21:23:33 34.043 -117.266 16.6 2 km ( 1 mi) WSW of Loma Linda, CA

---

April 12, 2007

24 Hour Peak Crustal Resonant Frequency = 0.54 Hz (-66.05 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

---

M5.2 2007/04/12 02:59:09 -18.645 -69.279 124.8 TARAPACA, CHILE

ML1.2 2007/04/12 02:58:58 35.487 -121.073 4.9 8 km ( 5 mi) S of Cambria, CA
ML1.3 2007/04/12 02:35:20 34.011 -117.006 5.8 4 km ( 3 mi) ESE of Yucaipa, CA
ML1.7 2007/04/12 02:28:57 39.467 -123.109 2.6 15 km ( 9 mi) WNW of Lake Pillsbury, CA
ML2.4 2007/04/12 01:20:03 39.463 -123.111 3.4 14 km ( 9 mi) WNW of Lake Pillsbury, CA
ML1.4 2007/04/12 00:28:08 33.685 -116.761 15.3 8 km ( 5 mi) SSW of Idyllwild, CA
ML1.5 2007/04/12 00:25:20 34.007 -116.773 13.7 11 km ( 7 mi) N of Cabazon, 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

---

ML2.0 2007/04/12 04:29:33 36.028 -120.613 3.3 22 km ( 13 mi) NW of Parkfield, CA

M4.7 2007/04/12 04:02:05 47.485 152.706 10.0 KURIL ISLANDS

ML2.3 2007/04/12 03:21:11 40.543 -123.709 19.3 32 km ( 20 mi) E of Hydesville, 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

---

ML1.8 2007/04/12 08:22:01 36.745 -121.341 7.7 5 km ( 3 mi) SSW of Tres Pinos, CA
ML1.7 2007/04/12 08:12:05 36.744 -121.339 7.5 5 km ( 3 mi) SSW of Tres Pinos, CA

M4.8 2007/04/12 08:06:16 -15.325 -173.537 64.1 TONGA

ML1.7 2007/04/12 06:58:56 33.182 -116.008 7.0 12 km ( 8 mi) ENE of Ocotillo Wells, CA
ML1.6 2007/04/12 06:05:51 38.828 -122.754 1.2 3 km ( 2 mi) WSW of Cobb, 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

---

ML2.0 2007/04/12 11:32:54 32.926 -115.552 17.3 6 km ( 4 mi) SSW of Brawley, CA
ML1.6 2007/04/12 11:09:23 34.072 -117.317 18.7 1 km ( 1 mi) NNE of Colton, CA

M5.3 2007/04/12 10:59:02 -21.408 169.029 28.5 SOUTHEAST OF THE LOYALTY ISLANDS

ML1.3 2007/04/12 10:51:18 38.795 -122.799 4.4 1 km ( 0 mi) ESE of The Geysers, CA
ML2.2 2007/04/12 10:49:11 38.794 -122.800 5.1 1 km ( 0 mi) SE of The Geysers, CA
ML1.4 2007/04/12 10:33:26 34.586 -116.620 2.7 34 km ( 21 mi) ENE of Lucerne Valley, CA
ML1.5 2007/04/12 09:35:11 36.533 -121.118 2.4 2 km ( 1 mi) E of Pinnacles, CA

ML4.1 2007/04/12 09:13:52 60.347 -153.766 196.1 SOUTHERN ALASKA

---

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 2007/04/12 14:20:51 33.666 -116.748 15.6 9 km ( 6 mi) SSW of Idyllwild, CA

M4.6 2007/04/12 13:00:00 41.340 142.655 50.7 HOKKAIDO, JAPAN REGION

ML1.1 2007/04/12 12:35:53 35.993 -120.553 3.4 15 km ( 9 mi) NW of Parkfield, CA

M4.6 2007/04/12 12:02:43 -31.284 -179.726 537.0 KERMADEC ISLANDS REGION

---

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

---

ML1.4 2007/04/12 17:53:45 36.745 -121.339 7.5 5 km ( 3 mi) SSW of Tres Pinos, CA

M4.7 2007/04/12 17:39:53 -13.732 34.871 2.7 MALAWI

ML1.7 2007/04/12 17:37:06 36.745 -121.338 8.6 5 km ( 3 mi) SSW of Tres Pinos, CA

M4.3 2007/04/12 17:15:54 -17.069 -174.439 168.4 TONGA

ML2.3 2007/04/12 17:07:22 36.641 -121.255 4.5 16 km ( 10 mi) NW of Pinnacles, CA
ML1.6 2007/04/12 16:58:39 36.244 -120.797 7.3 22 km ( 14 mi) SSW of New Idria, CA
ML1.3 2007/04/12 16:43:29 36.743 -121.339 7.3 5 km ( 3 mi) SSW of Tres Pinos, CA
ML1.1 2007/04/12 16:27:46 36.745 -121.339 7.6 5 km ( 3 mi) SSW of Tres Pinos, CA
ML1.4 2007/04/12 16:22:41 36.418 -115.622 0.0 18 km ( 11 mi) SSE of Indian Springs, NV
ML1.3 2007/04/12 16:20:52 38.803 -122.744 1.2 4 km ( 2 mi) SSW of Cobb, CA

ML3.1 2007/04/12 16:17:02 36.746 -121.341 8.2 5 km ( 3 mi) SSW of Tres Pinos, CA

ML1.8 2007/04/12 16:06:51 36.641 -121.257 4.4 16 km ( 10 mi) NW of Pinnacles, CA
ML2.2 2007/04/12 16:05:27 33.909 -118.339 11.0 1 km ( 1 mi) SE of Hawthorne, CA

M5.1 2007/04/12 15:13:09 -14.592 167.388 164.6 VANUATU

---

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

---

ML1.9 2007/04/12 20:54:59 35.918 -115.240 0.0 13 km ( 8 mi) SSW of Enterprise, NV
ML1.9 2007/04/12 19:28:37 36.745 -121.344 7.7 5 km ( 3 mi) SSW of Tres Pinos, CA
ML1.2 2007/04/12 19:19:56 37.833 -122.043 8.2 3 km ( 2 mi) SSW of Alamo, CA
ML1.3 2007/04/12 19:05:28 33.850 -116.869 13.8 9 km ( 6 mi) SSE of Banning, CA
ML1.5 2007/04/12 18:42:24 36.744 -121.339 7.4 5 km ( 3 mi) SSW of Tres Pinos, CA

M6.0 2007/04/12 18:24:48 -61.846 160.662 1.3 BALLENY ISLANDS 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

---

ML1.7 2007/04/12 23:42:21 36.526 -117.962 12.4 9 km ( 6 mi) WNW of Keeler, CA
ML2.3 2007/04/12 23:39:28 36.497 -121.073 3.7 7 km ( 5 mi) ESE of Pinnacles, CA
ML1.3 2007/04/12 23:04:05 38.050 -122.249 8.2 2 km ( 1 mi) W of Crockett, CA
ML2.5 2007/04/12 22:27:50 37.372 -118.372 12.9 2 km ( 1 mi) ENE of Bishop, CA
ML1.9 2007/04/12 21:49:53 36.889 -122.163 10.2 15 km ( 9 mi) SW of Santa Cruz, CA
ML1.3 2007/04/12 21:45:47 36.745 -121.336 7.2 5 km ( 3 mi) SSW of Tres Pinos, CA
ML2.2 2007/04/12 21:33:07 37.953 -118.539 8.5 39 km ( 25 mi) S of Qualeys Camp, NV
ML2.0 2007/04/12 21:31:43 36.455 -120.760 11.4 9 km ( 5 mi) WNW of New Idria, CA
ML2.2 2007/04/12 21:09:24 33.854 -117.504 0.0 6 km ( 4 mi) ESE of Corona, CA

---

April 13, 2007

Peak Crustal Resonant Frequency = 0.55 Hz (-66.96 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

---

ML2.0 2007/04/13 02:52:09 36.457 -120.766 12.8 9 km ( 6 mi) WNW of New Idria, CA

ML4.4 2007/04/13 02:46:25 51.300 -178.076 23.6 ANDREANOF ISLANDS, ALEUTIAN IS., ALASKA

M4.8 2007/04/13 01:53:27 46.504 153.182 10.0 KURIL ISLANDS
M5.2 2007/04/13 01:50:24 -15.743 -179.160 10.0 FIJI REGION
M4.7 2007/04/13 01:28:08 46.843 152.864 27.5 KURIL ISLANDS

ML1.4 2007/04/13 00:16:56 37.971 -118.731 7.9 34 km ( 21 mi) E of Lee Vining, 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

---

M6.0 2007/04/13 05:42:24 17.353 -100.101 35.3 GUERRERO, MEXICO

ML2.0 2007/04/13 05:00:03 35.526 -120.836 8.6 11 km ( 7 mi) NNE of Cayucos, CA
ML2.0 2007/04/13 04:37:37 38.282 -116.043 0.0 30 km ( 19 mi) ENE of Warm Springs, NV
ML1.7 2007/04/13 04:24:51 32.561 -115.674 4.9 21 km ( 13 mi) SW of Calexico, 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

---

ML2.0 2007/04/13 08:51:28 32.568 -115.317 35.1 17 km ( 11 mi) ESE of Mexicali, Mexico

ML5.4 2007/04/13 08:43:50 17.453 -100.029 52.0 GUERRERO, MEXICO

ML1.2 2007/04/13 08:16:07 35.719 -121.035 5.7 14 km ( 9 mi) W of Lake Nacimiento, CA
ML1.5 2007/04/13 07:58:46 34.146 -116.460 12.8 5 km ( 3 mi) WNW of Yucca Valley, CA
ML2.4 2007/04/13 07:30:50 38.749 -122.707 0.1 3 km ( 2 mi) SSW of Anderson Springs, CA
ML1.4 2007/04/13 07:01:15 37.465 -118.815 11.8 16 km ( 10 mi) SW of Toms Place, 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

---

ML1.6 2007/04/13 11:24:34 37.531 -118.821 7.0 13 km ( 8 mi) WSW of Toms Place, CA
ML1.0 2007/04/13 11:10:36 38.831 -122.868 1.7 6 km ( 4 mi) NW of The Geysers, CA
ML1.3 2007/04/13 10:58:02 35.656 -120.941 6.0 11 km ( 7 mi) SSW of Lake Nacimiento, CA
ML1.6 2007/04/13 10:40:33 35.861 -120.645 1.4 13 km ( 8 mi) NNE of San Miguel, CA
ML1.6 2007/04/13 10:16:39 38.813 -122.795 4.7 2 km ( 1 mi) NNE of The Geysers, CA
ML2.0 2007/04/13 10:14:34 38.813 -122.796 4.4 2 km ( 1 mi) NNE of The Geysers, CA
ML1.6 2007/04/13 10:05:46 38.827 -122.782 2.4 4 km ( 2 mi) NNE of The Geysers, CA
ML1.8 2007/04/13 10:04:42 37.040 -114.467 4.0 19 km ( 12 mi) ENE of Hoya, NV
ML1.2 2007/04/13 10:01:19 33.633 -116.703 16.4 9 km ( 6 mi) NNW of Anza, CA

M5.0 2007/04/13 09:34:23 4.283 125.566 10.0 KEPULAUAN SANGIHE, INDONESIA

ML1.2 2007/04/13 09:31:22 38.804 -122.793 1.9 1 km ( 1 mi) ENE of The Geysers, CA
ML2.2 2007/04/13 09:27:51 36.746 -121.339 8.4 5 km ( 3 mi) SSW of Tres Pinos, CA

M5.5 2007/04/13 09:14:51 -1.164 126.942 10.0 KEPULAUAN SULA, INDONESIA

ML1.5 2007/04/13 09:11:41 34.002 -116.827 17.9 10 km ( 6 mi) NE of Banning, 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

---

ML4.8 2007/04/13 14:42:36 18.383 -102.577 78.0 MICHOACAN, MEXICO

M4.5 2007/04/13 14:09:16 36.519 70.639 214.4 HINDU KUSH REGION, AFGHANISTAN

ML1.7 2007/04/13 13:09:24 33.910 -116.927 15.0 4 km ( 2 mi) SW of Banning, CA

M5.0 2007/04/13 12:20:52 1.728 97.114 22.9 NIAS REGION, INDONESIA

---

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 2007/04/13 17:57:07 38.239 -118.652 0.0 13 km ( 8 mi) SW of Qualeys Camp, NV
ML1.6 2007/04/13 16:59:15 34.849 -118.916 20.0 3 km ( 2 mi) WNW of Lebec, CA
ML1.7 2007/04/13 15:49:28 37.532 -118.820 6.8 13 km ( 8 mi) WSW of Toms Place, 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

---

M4.6 2007/04/13 20:42:29 36.560 141.118 75.6 NEAR THE EAST COAST OF HONSHU, JAPAN

ML1.5 2007/04/13 20:06:43 33.151 -116.558 16.6 9 km ( 6 mi) NNE of Julian, CA
ML2.1 2007/04/13 18:39:45 36.413 -120.993 5.5 19 km ( 12 mi) SE of Pinnacles, CA

M5.8 2007/04/13 18:24:19 -35.062 -108.864 10.0 SOUTHERN EAST PACIFIC RISE

ML1.9 2007/04/13 18:18:33 32.818 -116.316 9.0 20 km ( 12 mi) E of Pine Valley, CA
ML1.6 2007/04/13 18:13:34 37.396 -122.278 0.2 3 km ( 2 mi) SSW of Woodside, CA

M5.3 2007/04/13 18:11:06 33.573 140.828 59.6 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

---

ML1.1 2007/04/13 23:59:45 36.745 -121.339 7.4 5 km ( 3 mi) SSW of Tres Pinos, CA

ML1.3 2007/04/13 23:50:05 33.320 -116.361 13.3 8 km ( 5 mi) N of Borrego Springs, CA

ML4.7 2007/04/13 23:36:48 52.311 -168.239 35.0 FOX ISLANDS, ALEUTIAN ISLANDS, ALASKA

ML1.1 2007/04/13 22:54:05 36.745 -121.339 7.6 5 km ( 3 mi) SSW of Tres Pinos, CA
ML1.4 2007/04/13 22:20:15 39.514 -119.599 8.0 13 km ( 8 mi) ESE of Sparks, NV
ML1.5 2007/04/13 22:14:53 36.223 -115.403 0.0 12 km ( 8 mi) NNW of Summerlin South, NV
ML1.3 2007/04/13 22:01:26 39.513 -119.729 0.0 5 km ( 3 mi) S of Sparks, NV

ML5.1 2007/04/13 21:56:52 52.603 -168.254 29.0 FOX ISLANDS, ALEUTIAN ISLANDS, ALASKA

ML2.4 2007/04/13 21:34:16 36.746 -121.344 8.3 5 km ( 3 mi) SSW of Tres Pinos, CA
ML1.4 2007/04/13 21:32:08 36.745 -121.341 7.5 5 km ( 3 mi) SSW of Tres Pinos, CA
ML1.4 2007/04/13 21:30:39 36.560 -121.081 7.6 6 km ( 4 mi) ENE of Pinnacles, CA
ML1.3 2007/04/13 21:18:31 36.760 -121.267 8.4 6 km ( 4 mi) SE of Tres Pinos, CA

---

April 14, 2007

24 Hour Peak Crustal Resonant Frequency = 0.58 Hz (-66.69 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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ML1.2 2007/04/14 02:33:25 33.456 -116.585 13.7 14 km ( 8 mi) SE of Anza, CA
ML1.3 2007/04/14 01:53:34 35.941 -117.499 7.0 22 km ( 14 mi) NNW of Searles Valley, CA
ML1.3 2007/04/14 01:53:23 38.429 -119.364 9.6 22 km ( 14 mi) NNW of Bridgeport, CA
ML1.8 2007/04/14 01:50:44 38.769 -122.734 2.7 4 km ( 2 mi) W of Anderson Springs, CA
ML1.4 2007/04/14 01:26:54 38.832 -122.806 6.5 4 km ( 2 mi) N of The Geysers, CA
ML2.0 2007/04/14 01:01:29 40.368 -123.654 20.0 31 km ( 19 mi) NNE of Redway, CA

ML4.4 2007/04/14 00:47:56 52.735 -168.385 35.0 FOX ISLANDS, ALEUTIAN ISLANDS, ALASKA

ML3.1 2007/04/14 00:11:17 40.651 -121.884 16.6 17 km ( 11 mi) SSE of Round Mountain, 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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ML3.1 2007/04/14 05:19:11 37.478 -118.839 4.6 17 km ( 10 mi) WSW of Toms Place, CA

ML2.5 2007/04/14 04:48:19 40.368 -123.653 21.0 31 km ( 19 mi) NNE of Redway, CA
ML1.1 2007/04/14 04:42:45 37.471 -118.846 7.5 18 km ( 11 mi) SW of Toms Place, CA
ML2.3 2007/04/14 04:27:19 36.747 -121.346 8.4 5 km ( 3 mi) SSW of Tres Pinos, CA
ML1.7 2007/04/14 03:51:32 40.694 -121.828 7.1 15 km ( 9 mi) SE of Round Mountain, CA
ML1.6 2007/04/14 03:18:49 33.707 -116.761 23.2 6 km ( 4 mi) SW of Idyllwild, CA

M5.1 2007/04/14 03:02:38 7.846 127.053 52.7 PHILIPPINE ISLANDS REGION

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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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ML2.0 2007/04/14 07:25:50 40.642 -121.888 17.0 16 km (10 mi) N of Shingletown, CA
ML1.4 2007/04/14 07:22:05 37.474 -118.841 4.0 17 km (11 mi) SW of Toms Place, CA
ML1.6 2007/04/14 07:04:24 34.044 -117.255 17.4 1 km ( 0 mi) SW of Loma Linda, CA

ML3.2 2007/04/14 06:15:32 18.280 -67.491 158.9 26 km ( 16 mi) WSW of Rincón, PR

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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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ML2.5 2007/04/14 11:57:25 37.129 -121.529 7.4 8 km ( 5 mi) NE of San Martin, CA
ML1.4 2007/04/14 11:50:01 33.964 -117.072 18.7 8 km ( 5 mi) SSW of Yucaipa, CA

M4.4 2007/04/14 11:09:40 -0.949 -79.472 161.8 ECUADOR

ML1.2 2007/04/14 10:32:48 37.142 -115.269 12.0 27 km ( 16 mi) SSW of Alamo, NV
ML1.9 2007/04/14 10:09:54 37.480 -118.839 3.4 17 km ( 10 mi) WSW of Toms Place, CA

M4.9 2007/04/14 10:00:53 -36.322 -97.737 10.0 WEST CHILE RISE

ML1.1 2007/04/14 09:44:19 36.746 -121.344 7.7 5 km ( 3 mi) SSW of Tres Pinos, CA
ML1.3 2007/04/14 09:25:04 36.741 -121.341 8.3 6 km ( 4 mi) SSW of Tres Pinos, 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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ML2.1 2007/04/14 14:28:11 35.688 -121.127 5.1 8 km ( 5 mi) NE of San Simeon, CA
ML1.6 2007/04/14 13:40:37 33.612 -116.613 12.4 8 km ( 5 mi) NE of Anza, CA
ML1.0 2007/04/14 13:26:00 36.644 -121.083 11.8 14 km ( 8 mi) NNE of Pinnacles, CA
ML2.5 2007/04/14 12:46:09 33.688 -116.749 18.4 7 km ( 4 mi) SSW of Idyllwild, CA

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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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ML1.9 2007/04/14 17:49:36 33.163 -116.055 2.5 7 km ( 5 mi) ENE of Ocotillo Wells, CA

M4.4 2007/04/14 17:44:49 16.879 -60.890 30.0 GUADELOUPE REGION, LEEWARD ISLANDS
M4.8 2007/04/14 17:22:42 45.271 98.325 25.9 CENTRAL MONGOLIA

ML1.4 2007/04/14 16:52:41 37.453 -118.839 5.9 19 km ( 12 mi) SW of Toms Place, CA

M4.9 2007/04/14 16:46:25 -20.905 168.719 36.7 LOYALTY ISLANDS
M4.7 2007/04/14 15:50:13 35.589 142.020 47.3 OFF THE EAST COAST OF HONSHU, JAPAN

ML1.2 2007/04/14 15:41:53 35.754 -121.114 6.8 14 km ( 9 mi) NNE of San Simeon, 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

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ML2.0 2007/04/14 20:26:51 34.044 -117.257 18.6 1 km ( 0 mi) SW of Loma Linda, CA
ML2.3 2007/04/14 19:41:21 37.449 -118.840 6.5 19 km ( 12 mi) SW of Toms Place, CA
ML1.0 2007/04/14 19:02:21 36.744 -121.341 7.9 5 km ( 3 mi) SSW of Tres Pinos, CA

M4.8 2007/04/14 18:59:19 -6.943 155.824 79.5 BOUGAINVILLE REGION, PAPUA NEW GUINEA

ML1.4 2007/04/14 18:43:39 33.243 -117.328 30.4 4 km ( 2 mi) N of Oceanside, CA
ML1.4 2007/04/14 18:41:17 36.877 -121.261 9.6 11 km ( 7 mi) NNE of Tres Pinos, CA
ML1.2 2007/04/14 18:31:13 36.746 -121.337 9.3 5 km ( 3 mi) SSW of Tres Pinos, CA
ML2.9 2007/04/14 18:29:20 36.746 -121.338 8.2 5 km ( 3 mi) SSW of Tres Pinos, CA

M4.9 2007/04/14 18:25:29 -3.535 145.107 28.7 NEAR NORTH COAST OF NEW GUINEA, P.N.G.

ML1.8 2007/04/14 18:23:40 36.743 -121.343 8.3 6 km ( 3 mi) SSW of Tres Pinos, CA
ML2.3 2007/04/14 18:05:30 38.794 -122.753 3.2 5 km ( 3 mi) E of The Geysers, CA

M4.7 2007/04/14 18:00:59 -3.602 145.033 53.2 NEAR NORTH COAST OF NEW GUINEA, P.N.G.

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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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M4.6 2007/04/14 23:57:23 -3.522 144.673 35.0 NEAR NORTH COAST OF NEW GUINEA, P.N.G.
M4.8 2007/04/14 23:17:02 -3.695 144.898 35.0 NEAR NORTH COAST OF NEW GUINEA, P.N.G.

ML1.7 2007/04/14 21:43:23 36.742 -121.337 7.8 6 km ( 3 mi) SSW of Tres Pinos, CA
ML1.6 2007/04/14 21:39:12 37.973 -118.727 7.7 35 km ( 21 mi) E of Lee Vining, CA

M4.8 2007/04/14 21:17:00 29.272 129.151 58.3 RYUKYU ISLANDS, JAPAN

ML1.4 2007/04/14 21:16:22 33.612 -116.082 3.6 4 km ( 3 mi) N of Mecca, CA

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Frank Condon

Independent Earthquake Precursor Research Consultant

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