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Earthquake
Precursor
Research



©GeoSeismic Labs 2007.

Supplement to Volume 7
Issue No. 2.0

GeoSeismic Labs Reports: February 2007

All forecasts are based upon Quantitative Analysis using Empirical Methods. Any information related to a forecast expressed by GeoSeismic Labs is considered a test of a hypothesis, and experimental in nature.
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February 15-21, 2007

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

Graphic:(AE)Infrasonic Spectrogram

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

February 19, 2007: Peak Crustal Resonant Frequency = 0.61 Hz (-66.67 dBv)


20 FEB 2007 ( 51)

ot = 08:04:26.78 +/- 1.84 KEPULAUAN OBI, INDONESIA
lat = -1.055 +/- 3.4
lon = 127.068 +/- 4.5 MAGNITUDE 6.7 (GCMT)
dep = 22.5 +/- 13.5

210 km (130 miles) S of Ternate, Moluccas, Indonesia
315 km (195 miles) NNW of Ambon, Moluccas, Indonesia
1320 km (820 miles) NNW of DARWIN, Northern Territory, Australia
2325 km (1440 miles) ENE of JAKARTA, Java, Indonesia

Graphic:(AE)Infrasonic Spectrogram

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

February 18, 2007: Peak Crustal Resonant Frequency = 0.60 Hz (-67.00 dBv)


Magnitude 3.3 - local magnitude (ML)
Time Sunday, February 18, 2007 at 10:42:48 PM (PST)
Monday, February 19, 2007 at 6:42:48 (UTC)
Distance from Bayview, CA - 41 km (25 miles) WNW (299 degrees)
Humboldt Hill, CA - 41 km (26 miles) NW (305 degrees)
Eureka, CA - 41 km (26 miles) WNW (295 degrees)
Trinidad, CA - 41 km (26 miles) WSW (252 degrees)
Sacramento, CA - 378 km (235 miles) NW (316 degrees)

Coordinates 40 deg. 56.7 min. N (40.944N), 124 deg. 36.5 min. W (124.608W)
Depth 0.1 km (0.1 miles)

Event ID# nc40193701

Graphic:(AE)Infrasonic Spectrogram

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

February 8, 2007: Peak Crustal Resonant Frequency = 0.60 Hz (-66.31 dBv)


Magnitude 4.3 - local magnitude (ML)
Time Thursday, February 8, 2007 at 7:33:43 PM (PST)
Friday, February 9, 2007 at 3:33:43 (UTC)
Distance from Ocotillo Wells, CA - 8 km (5 miles) NNW (343 degrees)
Borrego Springs, CA - 21 km (13 miles) ESE (102 degrees)
Salton City, CA - 21 km (13 miles) WSW (241 degrees)
El Centro, CA - 73 km (45 miles) NW (310 degrees)
San Diego, CA - 104 km (65 miles) ENE (62 degrees)

Coordinates 33 deg. 12.6 min. N (33.209N), 116 deg. 9.3 min. W (116.155W)
Depth 6 km (3.7 miles)

Event ID# ci10230869

Graphic:(AE)Infrasonic Spectrogram

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

February 7, 2007: Peak Crustal Resonant Frequency = 0.57 Hz (-67.16 dBv)


Magnitude 3.3 - local magnitude (ML)
Time Wednesday, February 7, 2007 at 7:12:04 PM (PST)
Thursday, February 8, 2007 at 3:12:04 (UTC)
Distance from Ocotillo, CA - 8 km (5 miles) SW (234 degrees)
Seeley, CA - 37 km (23 miles) WSW (253 degrees)
Pine Valley, CA - 45 km (28 miles) ESE (109 degrees)
El Centro, CA - 49 km (30 miles) WSW (258 degrees)
Tijuana, Baja California, Mexico - 91 km (57 miles) ENE (78 degrees)

Coordinates 32 deg. 41.8 min. N (32.696N), 116 deg. 4.1 min. W (116.068W)
Depth 5.8 km (3.6 miles)

Event ID# ci10230693

Graphic:(AE)Infrasonic Spectrogram

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

February 3, 2007: Peak Crustal Resonant Frequency = 0.57 Hz (-67.55 dBv)


Magnitude 3.3 - local magnitude (ML)
Time Saturday, February 3, 2007 at 5:05:26 AM (PST)
Saturday, February 3, 2007 at 13:05:26 (UTC)
Distance from Gilroy, CA - 11 km (7 miles) E (100 degrees)
San Martin, CA - 17 km (10 miles) SE (129 degrees)
Hollister, CA - 17 km (11 miles) NNW (343 degrees)
San Juan Bautista, CA - 18 km (11 miles) NNE (24 degrees)
San Jose City Hall, CA - 55 km (34 miles) SE (135 degrees)

Coordinates 36 deg. 59.6 min. N (36.994N), 121 deg. 27.3 min. W (121.454W)
Depth 8.9 km (5.5 miles)

Event ID# nc40193227

Graphic:(AE)Infrasonic Spectrogram

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

January 31, 2007: Peak Crustal Resonant Frequency = 0.56 Hz (-66.92 dBv)


Magnitude 2.6 - local magnitude (ML)
Time Wednesday, January 31, 2007 at 6:35:44 AM (PST)
Wednesday, January 31, 2007 at 14:35:44 (UTC)
Distance from Mojave, CA - 12 km (8 miles) W (271 degrees)
Tehachapi, CA - 17 km (10 miles) SE (138 degrees)
Rosamond, CA - 20 km (13 miles) NNW (327 degrees)
Lancaster, CA - 40 km (25 miles) NNW (337 degrees)
Los Angeles Civic Center, CA - 107 km (67 miles) N (356 degrees)

Coordinates 35 deg. 1.1 min. N (35.018N), 118 deg. 19.6 min. W (118.326W)
Depth 8 km (5.0 miles)

Event ID# ci10229153

Graphic:(AE)Infrasonic Spectrogram

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

Magnitude 1.4 - local magnitude (ML)
Time Tuesday, January 30, 2007 at 8:25:09 PM (PST)
Wednesday, January 31, 2007 at 4:25:09 (UTC)
Distance from Borrego Springs, CA - 17 km (11 miles) N (4 degrees)
Desert Shores, CA - 30 km (18 miles) W (270 degrees)
La Quinta, CA - 31 km (19 miles) S (191 degrees)
Palm Springs, CA - 49 km (31 miles) SSE (161 degrees)
San Diego, CA - 101 km (63 miles) NE (46 degrees)

Coordinates 33 deg. 24.2 min. N (33.404N), 116 deg. 21.5 min. W (116.359W)
Depth 16.6 km (10.3 miles)

Event ID# ci10229109

Graphic:(AE)Infrasonic Spectrogram

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

January 30, 2007: Peak Crustal Resonant Frequency = 0.58 Hz (-67.49 dBv)


Magnitude 3.3 - local magnitude (ML)
Time Tuesday, January 30, 2007 at 3:56:24 PM (PST)
Tuesday, January 30, 2007 at 23:56:24 (UTC)
Distance from Devore, CA - 9 km (6 miles) W (274 degrees)
Rancho Cucamonga, CA - 14 km (8 miles) NNE (31 degrees)
Mt. Baldy, CA - 15 km (9 miles) ESE (117 degrees)
Rialto, CA - 17 km (11 miles) NW (319 degrees)
Los Angeles Civic Center, CA - 71 km (44 miles) ENE (74 degrees)

Coordinates 34 deg. 13.7 min. N (34.228N), 117 deg. 30.2 min. W (117.504W)
Depth 2.8 km (1.7 miles)

Event ID# ci10229069

Graphic:(AE)Infrasonic Spectrogram

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

Magnitude 2.2 - local magnitude (ML)
Time Tuesday, January 30, 2007 at 5:56:19 AM (PST)
Tuesday, January 30, 2007 at 13:56:19 (UTC)
Distance from Devore, CA - 6 km (4 miles) WNW (284 degrees)
Rialto, CA - 15 km (10 miles) NNW (332 degrees)
Fontana, CA - 15 km (9 miles) N (359 degrees)
Crestline, CA - 16 km (10 miles) W (267 degrees)
Los Angeles Civic Center, CA - 75 km (47 miles) ENE (74 degrees)

Coordinates 34 deg. 14.0 min. N (34.234N), 117 deg. 27.7 min. W (117.461W)
Depth 8.5 km (5.3 miles)

Event ID# ci10229009


Magnitude 1.5 - local magnitude (ML)
Time Tuesday, January 30, 2007 at 4:44:23 AM (PST)
Tuesday, January 30, 2007 at 12:44:23 (UTC)
Distance from Devore, CA - 9 km (6 miles) W (264 degrees)
Rancho Cucamonga, CA - 12 km (8 miles) NE (37 degrees)
Mt. Baldy, CA - 16 km (10 miles) ESE (121 degrees)
Rialto, CA - 16 km (10 miles) NW (317 degrees)
Los Angeles Civic Center, CA - 71 km (44 miles) ENE (75 degrees)

Coordinates 34 deg. 12.8 min. N (34.213N), 117 deg. 29.9 min. W (117.499W)
Depth 5.3 km (3.3 miles)

Event ID# ci10228993

Graphic:(AE)Infrasonic Spectrogram

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

January 29, 2007: Peak Crustal Resonant Frequency = 0.56 Hz (-67.62 dBv)


San Jacinto Fault Zone:.
Within the San Jacinto Valley Segment.
Located north of the Anza Seismic Gap.
Last Major Earthquake was in 1918..
The Casa Loma Fault has a recurrence
interval of 98 years for major seismic events.

Magnitude 1.2 - local magnitude (ML)
Time Monday, January 29, 2007 at 6:24:06 AM (PST)
Monday, January 29, 2007 at 14:24:06 (UTC)
Distance from Valle Vista, CA - 9 km (6 miles) ESE (123 degrees)
Idyllwild, CA - 10 km (6 miles) WSW (247 degrees)
Hemet, CA - 16 km (10 miles) ESE (104 degrees)
Palm Springs, CA - 29 km (18 miles) WSW (244 degrees)
San Diego, CA - 108 km (67 miles) NNE (16 degrees)

Coordinates 33 deg. 42.5 min. N (33.708N), 116 deg. 49.0 min. W (116.817W)
Depth 18 km (11.2 miles)

Event ID# ci10228865


January 15, 2007: Peak Crustal Resonant Frequency = 0.58 Hz (-66.85 dBv)


San Jacinto Fault Zone:.
Within the San Jacinto Valley Segment.
Located north of the Anza Seismic Gap.
Last Major Earthquake was in 1918..
The Casa Loma Fault has a recurrence
interval of 98 years for major seismic events.

Magnitude 2.0 - local magnitude (ML)
Time Monday, January 15, 2007 at 5:32:42 PM (PST)
Tuesday, January 16, 2007 at 1:32:42 (UTC)
Distance from Valle Vista, CA - 8 km (5 miles) ESE (109 degrees)
Idyllwild, CA - 9 km (6 miles) WSW (258 degrees)
Hemet, CA - 16 km (10 miles) E (95 degrees)
Palm Springs, CA - 28 km (17 miles) WSW (248 degrees)
San Diego, CA - 110 km (68 miles) NNE (16 degrees)

Coordinates 33 deg. 43.7 min. N (33.728N), 116 deg. 48.7 min. W (116.811W)
Depth 10.6 km (6.6 miles)

Event ID# ci10226645


Magnitude 1.2 - local magnitude (ML)
Time Monday, January 15, 2007 at 5:22:28 PM (PST)
Tuesday, January 16, 2007 at 1:22:28 (UTC)
Distance from Valle Vista, CA - 7 km (4 miles) ESE (116 degrees)
Idyllwild, CA - 11 km (7 miles) WSW (258 degrees)
Hemet, CA - 14 km (9 miles) E (98 degrees)
Palm Springs, CA - 30 km (18 miles) WSW (248 degrees)
San Diego, CA - 109 km (68 miles) NNE (16 degrees)

Coordinates 33 deg. 43.5 min. N (33.725N), 116 deg. 49.8 min. W (116.829W)
Depth 17.8 km (11.1 miles)

Event ID# ci10226641

120 Day Peak Crustal Resonant Frequency Chart

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

Acoustic Emissions Catalog Table of Contents









Strong Global Earthquakes


Pacific Plate's Stress Center Related Earthquakes


North American Earthquakes of Special Interest


California, Nevada, and Baja Mexico Earthquakes


North American Micro Quakes of Special Interest







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.


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.


Useful Links & Other Related Sources of Information


Graphic:(AE)Unclamping Level Chart 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, and   October 2005.

" 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
Graphic:(Map)Tectonic Plates Caption: Map of 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.

Graphic:Global 60 Day (AE)Unclamping Incident Chart

Graphic:Regional 60 Day (AE)Unclamping Incident Chart

Graphic:Global 60 Day (AE)Unclamping Incident Chart

Graphic:Global 60 Day (AE)Unclamping Incident Chart

Caption:The inferred 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.


Graphic:Regional 60 Day (AE)Unclamping Incident Chart

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.



February 15, 2007

24 Hour Peak Crustal Resonant Frequency = 0.58 Hz (-66.77 dBv)

00:00-03:00 UTC

Return to Table of Contents
Graphic:(AE)Infrasonic Spectrogram 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 2007/02/15 02:27:22 34.107 -117.067 0.0 7 km ( 4 mi) NE of Mentone, CA
ML1.7 2007/02/15 01:54:22 34.000 -116.871 16.1 8 km ( 5 mi) NNE of Banning, CA
ML1.8 2007/02/15 00:18:41 35.062 -118.302 3.2 11 km ( 7 mi) WNW of Mojave, CA
ML2.5 2007/02/15 00:12:32 36.714 -121.346 1.5 9 km ( 5 mi) SSW of Tres Pinos, CA


03:00 - 06:00 UTC

Return to Table of Contents
Graphic:(AE)Infrasonic Spectrogram 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 2007/02/15 05:23:22 38.792 -122.772 4.7 3 km ( 2 mi) ESE of The Geysers, CA
ML1.6 2007/02/15 05:16:00 33.487 -116.490 13.3 18 km (11 mi) ESE of Anza, CA
ML1.4 2007/02/15 05:14:01 33.481 -116.483 12.4 19 km (12 mi) ESE of Anza, CA
ML1.5 2007/02/15 04:50:55 35.052 -118.306 6.0 11 km ( 7 mi) WNW of Mojave, CA
ML1.4 2007/02/15 04:21:10 34.037 -116.319 11.0 10 km ( 6 mi) S of Joshua Tree, CA
ML1.5 2007/02/15 03:51:17 38.820 -122.840 1.6 4 km ( 2 mi) NW of The Geysers, CA

ML3.5 2007/02/15 03:47:07 18.967 -64.119 51.4 34 km ( 21 mi) NE of Settlement, British Virgin Islands


06:00-09:00 UTC

Return to Table of Contents
Graphic:(AE)Infrasonic Spectrogram 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 2007/02/15 07:10:25 33.666 -116.765 18.1 10 km ( 6 mi) SSW of Idyllwild, CA
ML1.4 2007/02/15 06:13:02 33.252 -115.984 16.1 6 km ( 4 mi) SSW of Salton City, CA
ML1.5 2007/02/15 06:06:11 33.447 -116.540 12.8 17 km (11 mi) SE of Anza, CA


09:00-12:00 UTC

Return to Table of Contents
Graphic:(AE)Infrasonic Spectrogram 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


ML2.2 2007/02/15 11:52:55 35.920 -117.681 4.2 28 km ( 17 mi) ESE of Coso Junction, CA

M4.7 2007/02/15 11:33:01 -7.930 -73.667 44.6 PERU-BRAZIL BORDER REGION

ML2.6 2007/02/15 11:32:39 33.699 -116.769 17.7 7 km ( 5 mi) SW of Idyllwild, CA
ML1.6 2007/02/15 11:29:24 34.002 -118.390 15.0 1 km ( 1 mi) ESE of Culver City, CA
ML2.5 2007/02/15 10:29:20 36.806 -118.695 0.2 28 km ( 17 mi) NNE of Sequoia National Park, CA

M5.4 2007/02/15 10:27:31 -32.184 -177.514 35.0 SOUTH OF THE KERMADEC ISLANDS
M5.3 2007/02/15 10:23:38 -31.912 -177.629 35.0 KERMADEC ISLANDS REGION

ML2.8 2007/02/15 10:19:01 35.065 -118.306 3.2 12 km ( 7 mi) WNW of Mojave, CA
ML2.8 2007/02/15 10:18:44 35.065 -118.306 4.3 12 km ( 7 mi) WNW of Mojave, CA
ML1.4 2007/02/15 09:20:44 33.495 -116.469 21.3 20 km ( 12 mi) ESE of Anza, CA


12:00-15:00 UTC

Return to Table of Contents
Graphic:(AE)Infrasonic Spectrogram 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 2007/02/15 14:48:17 35.919 -120.477 5.0 5 km ( 3 mi) WNW of Parkfield, CA

ML3.5 2007/02/15 14:33:41 19.017 -64.627 85.3 45 km ( 28 mi) NW of Settlement, British Virgin Islands

ML1.2 2007/02/15 12:21:19 33.151 -116.004 5.8 12 km ( 7 mi) E of Ocotillo Wells, CA


15:00-18:00 UTC

Return to Table of Contents
Graphic:(AE)Infrasonic Spectrogram 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 2007/02/15 17:34:47 38.020 -118.166 8.0 28 km ( 17 mi) SSW of Tonopah Junction, NV

M4.7 2007/02/15 17:16:53 10.876 -85.978 35.2 COSTA RICA
M4.9 2007/02/15 15:38:34 -25.956 113.373 10.0 WESTERN AUSTRALIA

ML1.4 2007/02/15 15:28:00 33.635 -116.684 2.9 9 km ( 6 mi) N of Anza, CA
ML1.8 2007/02/15 15:02:24 38.255 -114.867 0.0 24 km ( 15 mi) WSW of Pony Springs, NV


18:00-21:00 UTC

Return to Table of Contents
Graphic:(AE)Infrasonic Spectrogram 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 2007/02/15 20:54:51 38.822 -122.778 2.7 4 km ( 2 mi) NE of The Geysers, CA
ML2.0 2007/02/15 20:41:29 40.381 -124.077 21.5 13 km ( 8 mi) S of Rio Dell, CA
ML2.1 2007/02/15 19:16:24 36.271 -121.272 4.8 6 km ( 4 mi) SSW of Greenfield, CA


21:00-24:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/15 23:50:26 33.162 -116.682 18.3 8 km ( 5 mi) ESE of Mesa Grande, CA
ML1.3 2007/02/15 22:50:08 36.141 -117.662 3.7 16 km ( 10 mi) SSW of Darwin, CA
ML1.9 2007/02/15 22:48:43 39.261 -123.279 5.5 14 km ( 9 mi) NNW of Ukiah, CA
ML1.4 2007/02/15 21:10:59 36.226 -115.527 4.0 10 km ( 6 mi) ESE of Mount Charleston, NV


February 16, 2007

24 Hour Peak Crustal Resonant Frequency = 0.56 Hz (-66.74 dBv)

00:00-03:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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


ML2.2 2007/02/16 02:49:54 39.358 -123.279 0.0 8 km ( 5 mi) SE of Willits, CA
ML1.5 2007/02/16 02:44:34 34.039 -117.048 11.0 1 km ( 1 mi) N of Yucaipa, CA
ML1.4 2007/02/16 02:32:03 33.476 -116.582 15.7 12 km ( 8 mi) SE of Anza, CA
ML1.5 2007/02/16 02:22:26 35.686 -118.103 7.6 10 km ( 6 mi) E of Onyx, CA
ML1.0 2007/02/16 01:16:06 35.466 -120.819 13.7 7 km ( 4 mi) ENE of Cayucos, CA

M5.1 2007/02/16 01:15:25 -54.948 -26.466 10.0 SOUTH SANDWICH ISLANDS REGION

ML1.3 2007/02/16 00:20:28 33.734 -116.055 6.2 13 km ( 8 mi) ENE of Coachella, CA
ML1.6 2007/02/16 00:11:31 33.472 -116.532 16.9 16 km ( 10 mi) SE of Anza, CA


03:00 - 06:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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

ML2.2 2007/02/16 05:59:16 37.453 -118.357 6.2 10 km ( 6 mi) NNE of Bishop, CA
ML1.4 2007/02/16 04:54:36 35.643 -120.939 5.8 12 km ( 7 mi) SSW of Lake Nacimiento, CA
ML1.5 2007/02/16 04:35:50 37.831 -121.796 13.9 11 km ( 7 mi) ENE of Blackhawk, CA
ML2.4 2007/02/16 04:29:51 37.853 -121.772 18.9 11 km ( 7 mi) SSW of Brentwood, CA
ML1.5 2007/02/16 04:16:13 35.467 -120.816 13.1 7 km ( 5 mi) ENE of Cayucos, CA


06:00-09:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/16 07:58:59 37.453 -118.843 7.8 19 km ( 12 mi) SW of Toms Place, CA
ML1.1 2007/02/16 06:33:51 33.232 -116.066 10.1 12 km ( 7 mi) NNE of Ocotillo Wells, CA


09:00-12:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/16 10:42:32 36.568 -121.097 8.6 6 km ( 4 mi) NE of Pinnacles, CA
ML1.6 2007/02/16 10:15:29 33.632 -116.738 18.5 11 km ( 7 mi) NW of Anza, CA
ML1.3 2007/02/16 09:32:33 33.254 -116.093 0.9 13 km ( 8 mi) NNE of Ocotillo Wells, CA
ML1.3 2007/02/16 09:29:52 33.250 -116.101 0.1 12 km ( 8 mi) NNE of Ocotillo Wells, CA


12:00-15:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/16 13:32:29 33.500 -116.576 12.6 11 km ( 7 mi) SE of Anza, CA
ML1.2 2007/02/16 12:42:17 37.122 -115.244 8.0 28 km ( 17 mi) SSW of Alamo, NV
ML1.3 2007/02/16 12:39:10 36.045 -120.182 11.5 6 km ( 4 mi) WNW of Avenal, CA
ML1.4 2007/02/16 12:29:35 39.639 -123.014 5.1 25 km ( 15 mi) W of Alder Springs, CA
ML1.4 2007/02/16 12:28:46 36.081 -117.653 2.3 21 km ( 13 mi) SSW of Darwin, CA
ML1.5 2007/02/16 12:03:45 37.618 -118.808 11.6 13 km ( 8 mi) WNW of Toms Place, CA


15:00-18:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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


M5.0 2007/02/16 16:59:16 -16.480 -73.468 10.0 NEAR THE COAST OF SOUTHERN PERU

ML1.6 2007/02/16 16:41:31 39.478 -123.319 9.7 9 km ( 5 mi) NNE of Willits, CA
ML1.3 2007/02/16 16:04:31 36.643 -121.156 7.0 12 km ( 8 mi) N of Pinnacles, CA
ML1.7 2007/02/16 15:45:08 36.153 -121.728 17.8 21 km ( 13 mi) NW of Lopez Point, CA
ML1.7 2007/02/16 15:32:49 37.588 -118.871 6.5 11 km ( 7 mi) ESE of Mammoth Lakes, CA
ML2.1 2007/02/16 15:31:53 36.332 -118.525 0.8 34 km ( 21 mi) SE of Sequoia National Park, CA
ML2.7 2007/02/16 15:31:31 37.586 -118.874 6.4 11 km ( 7 mi) ESE of Mammoth Lakes, CA
ML2.8 2007/02/16 15:17:19 37.587 -118.875 6.5 11 km ( 7 mi) ESE of Mammoth Lakes, CA


18:00-21:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/16 20:06:16 36.059 -120.107 9.1 4 km ( 2 mi) NNE of Avenal, CA
ML1.5 2007/02/16 18:46:57 32.833 -116.085 10.2 13 km ( 8 mi) NW of Ocotillo, CA
ML1.8 2007/02/16 18:29:16 37.588 -118.874 6.2 11 km ( 7 mi) ESE of Mammoth Lakes, CA


21:00-24:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/16 23:45:35 33.493 -116.417 12.8 23 km ( 14 mi) SSW of La Quinta, CA
ML1.7 2007/02/16 23:07:17 32.988 -116.305 9.2 24 km ( 15 mi) SW of Ocotillo Wells, CA

M4.6 2007/02/16 22:40:08 53.734 158.755 127.2 NEAR THE EAST COAST OF KAMCHATKA, RUSSIA

ML2.0 2007/02/16 22:22:50 37.457 -118.840 8.5 18 km ( 11 mi) SW of Toms Place, CA
ML1.7 2007/02/16 21:18:56 33.834 -117.517 3.7 6 km ( 4 mi) SE of Corona, CA
ML1.6 2007/02/16 21:15:21 36.259 -115.227 0.0 7 km ( 4 mi) N of Las Vegas, NV
ML1.5 2007/02/16 21:01:17 40.505 -118.802 12.0 33 km ( 20 mi) W of Poker Brown, NV


February 17, 2007

24 Hour Peak Crustal Resonant Frequency = 0.57 Hz (-67.13 dBv)

00:00-03:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/17 02:27:48 33.256 -116.096 0.7 13 km ( 8 mi) NNE of Ocotillo Wells, CA
ML1.7 2007/02/17 01:45:13 35.175 -118.728 16.5 8 km ( 5 mi) W of Bear Valley Springs, CA
ML2.0 2007/02/17 01:14:04 36.513 -118.685 5.9 10 km ( 6 mi) SE of Sequoia National Park, CA

M5.1 2007/02/17 00:22:28 41.798 143.597 35.0 HOKKAIDO, JAPAN REGION

M6.0 2007/02/17 00:02:58 41.907 143.454 35.0 HOKKAIDO, JAPAN REGION


03:00 - 06:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/17 05:52:46 32.645 -117.040 7.9 2 km ( 1 mi) SSW of Bonita, CA
ML1.4 2007/02/17 04:49:16 32.908 -116.227 8.4 28 km (17 mi) SSW of Ocotillo Wells, CA

ML4.3 2007/02/17 04:36:56 54.330 -161.492 50.0 ALASKA PENINSULA

ML1.9 2007/02/17 04:36:29 34.504 -118.103 12.9 8 km ( 5 mi) ENE of Acton, CA

M4.9 2007/02/17 04:01:53 -3.582 151.253 440.2 NEW IRELAND REGION, PAPUA NEW GUINEA

ML1.2 2007/02/17 03:46:45 35.710 -121.043 8.2 15 km ( 9 mi) WSW of Lake Nacimiento, CA
ML2.1 2007/02/17 03:31:24 37.502 -118.844 9.5 16 km (10 mi) WSW of Toms Place, CA

M4.9 2007/02/17 03:23:17 11.424 143.305 35.0 SOUTH OF THE MARIANA ISLANDS


06:00-09:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/17 08:57:19 11.937 -88.502 38.2 OFF THE COAST OF CENTRAL AMERICA
M5.0 2007/02/17 07:56:48 -7.383 155.886 59.0 SOLOMON ISLANDS
M5.3 2007/02/17 07:47:54 -7.308 155.832 60.4 SOLOMON ISLANDS
M5.6 2007/02/17 07:43:37 -7.367 155.860 50.5 SOLOMON ISLANDS
M4.9 2007/02/17 06:31:22 -7.342 155.898 55.7 SOLOMON ISLANDS

ML1.6 2007/02/17 06:06:43 34.198 -117.097 4.9 2 km ( 1 mi) SE of Running Springs, CA


09:00-12:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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


M4.4 2007/02/17 11:51:58 12.757 -88.431 50.2 OFFSHORE EL SALVADOR

ML1.5 2007/02/17 10:26:37 33.261 -116.074 4.5 11 km ( 7 mi) WSW of Salton City, CA

M5.1 2007/02/17 09:18:36 -7.316 155.836 49.9 SOLOMON ISLANDS


12:00-15:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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


ML4.9 2007/02/17 14:51:40 64.261 -147.464 12.5 CENTRAL ALASKA

ML2.1 2007/02/17 14:02:10 33.850 -117.024 15.4 9 km ( 5 mi) NW of San Jacinto, CA

M5.5 2007/02/17 12:43:13 -7.250 155.768 35.1 SOLOMON ISLANDS


15:00-18:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/17 16:10:52 35.925 -117.382 4.8 18 km ( 11 mi) N of Trona, CA
ML1.2 2007/02/17 16:08:51 35.924 -117.377 4.1 17 km ( 11 mi) N of Trona, CA
ML2.6 2007/02/17 15:59:18 40.804 -124.887 0.5 58 km ( 36 mi) W of Humboldt Hill, CA


18:00-21:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/17 20:45:55 34.112 -116.847 5.4 2 km ( 1 mi) NW of Mt. San Gorgonio, CA
ML1.1 2007/02/17 20:27:37 40.056 -119.611 8.0 12 km ( 8 mi) N of Sutcliffe, NV
ML1.5 2007/02/17 20:18:25 35.627 -120.742 7.0 6 km ( 4 mi) W of Paso Robles, CA
ML1.3 2007/02/17 20:15:02 37.556 -117.431 12.0 23 km ( 14 mi) SW of West Spring, NV
ML2.5 2007/02/17 19:28:05 34.019 -119.159 0.2 16 km ( 10 mi) SSE of Port Hueneme, CA
ML1.9 2007/02/17 19:15:56 38.820 -122.795 0.0 3 km ( 2 mi) NNE of The Geysers, CA
ML1.3 2007/02/17 19:10:36 38.782 -117.935 8.0 9 km ( 6 mi) S of Gabbs, NV
ML1.6 2007/02/17 18:04:59 32.613 -115.552 2.2 9 km ( 6 mi) SW of Calexico, CA


21:00-24:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/17 23:43:59 36.011 -120.584 3.4 18 km ( 11 mi) NW of Parkfield, CA

M5.2 2007/02/17 23:41:45 -4.079 154.447 486.6 BOUGAINVILLE REGION, PAPUA NEW GUINEA

ML1.3 2007/02/17 22:55:19 33.716 -116.800 17.1 9 km ( 5 mi) WSW of Idyllwild, CA
ML1.3 2007/02/17 22:49:46 37.798 -115.879 0.0 27 km ( 17 mi) NW of Tempiute, NV
ML1.1 2007/02/17 22:18:06 33.661 -116.775 21.3 11 km ( 7 mi) SSW of Idyllwild, CA
ML2.6 2007/02/17 21:42:56 32.053 -115.850 0.0 72 km ( 45 mi) N of Lazaro Cardenas, Mexico


February 18, 2007

24 Hour Peak Crustal Resonant Frequency = 0.6 Hz (-67.00 dBv)

00:00-03:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/18 01:56:44 36.885 -121.626 8.1 1 km ( 1 mi) E of Aromas, CA
ML2.9 2007/02/18 01:39:26 40.566 -124.351 15.4 8 km ( 5 mi) W of Ferndale, CA
ML2.0 2007/02/18 01:15:25 38.832 -122.793 1.2 4 km ( 2 mi) NNE of The Geysers, CA
ML2.8 2007/02/18 01:13:18 31.668 -116.053 4.8 41 km ( 26 mi) NW of Lazaro Cardenas, Mexico
ML1.4 2007/02/18 00:58:25 37.632 -114.819 0.0 17 km ( 11 mi) NNW of Helene, NV


03:00 - 06:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/18 04:42:56 32.514 -115.528 10.9 16 km ( 10 mi) SSW of Mexicali, Mexico
ML1.7 2007/02/18 04:09:24 35.861 -120.407 5.3 5 km ( 3 mi) SSE of Parkfield, CA


06:00-09:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/18 08:59:11 33.113 -116.911 16.5 9 km ( 6 mi) NNW of Ramona, CA
ML1.2 2007/02/18 07:46:17 34.032 -117.028 10.4 2 km ( 1 mi) E of Yucaipa, CA
ML1.3 2007/02/18 06:34:19 33.334 -116.346 13.8 10 km ( 6 mi) NNE of Borrego Springs, CA
ML1.2 2007/02/18 06:31:00 35.477 -120.762 3.8 8 km ( 5 mi) W of Atascadero, CA


09:00-12:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/18 11:45:34 34.866 -120.269 3.4 14 km ( 9 mi) N of Los Alamos, CA

M5.0 2007/02/18 10:45:24 1.088 97.378 30.0 NIAS REGION, INDONESIA

ML1.1 2007/02/18 10:00:59 33.509 -116.429 14.1 22 km ( 14 mi) SSW of La Quinta, CA
ML1.3 2007/02/18 09:37:02 36.087 -117.654 3.8 21 km ( 13 mi) SSW of Darwin, CA


12:00-15:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/18 14:36:13 33.648 -116.571 7.0 14 km ( 9 mi) NE of Anza, CA
ML1.4 2007/02/18 14:33:50 34.633 -116.280 8.4 15 km ( 9 mi) SW of Ludlow, CA
ML2.8 2007/02/18 13:48:46 31.660 -116.012 0.2 38 km ( 24 mi) NW of Lazaro Cardenas, Mexico
ML1.4 2007/02/18 13:41:50 34.170 -116.442 11.4 5 km ( 3 mi) NNW of Yucca Valley, CA

M4.7 2007/02/18 13:39:16 -6.709 154.689 92.1 BOUGAINVILLE REGION, PAPUA NEW GUINEA
M4.5 2007/02/18 13:32:58 -2.989 128.781 30.0 CERAM SEA, INDONESIA

ML1.5 2007/02/18 13:31:08 33.276 -115.718 1.7 9 km ( 5 mi) S of Bombay Beach, CA

M4.4 2007/02/18 13:30:39 60.807 165.608 36.3 NEAR THE EAST COAST OF KORYAKIA, RUSSIA

ML2.6 2007/02/18 13:25:16 33.166 -115.660 3.0 2 km ( 1 mi) W of Obsidian Butte, CA

M4.5 2007/02/18 13:20:24 48.357 154.566 10.0 KURIL ISLANDS

ML1.6 2007/02/18 13:17:45 33.188 -115.640 4.3 2 km ( 1 mi) N of Obsidian Butte, CA
ML2.1 2007/02/18 13:13:51 33.189 -115.639 4.6 2 km ( 1 mi) N of Obsidian Butte, CA
ML1.4 2007/02/18 12:58:57 33.962 -116.794 19.2 6 km ( 4 mi) NNW of Cabazon, CA
ML1.8 2007/02/18 12:57:44 33.199 -115.641 2.6 3 km ( 2 mi) N of Obsidian Butte, CA
ML1.5 2007/02/18 12:49:47 34.385 -118.724 16.9 7 km ( 5 mi) ESE of Piru, CA

M4.8 2007/02/18 12:26:11 1.236 97.087 30.0 NIAS REGION, INDONESIA
M4.7 2007/02/18 12:03:01 -23.736 -179.879 479.0 SOUTH OF THE FIJI ISLANDS


15:00-18:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/18 17:34:10 32.692 -116.054 9.3 8 km ( 5 mi) SW of Ocotillo, CA
ML1.6 2007/02/18 17:32:18 32.692 -116.061 8.8 8 km ( 5 mi) SW of Ocotillo, CA

M4.9 2007/02/18 17:29:46 -20.320 173.048 57.3 VANUATU REGION
M4.7 2007/02/18 17:26:28 37.177 71.874 117.6 TAJIKISTAN
M4.8 2007/02/18 17:05:10 21.960 143.128 10.0 MARIANA ISLANDS REGION

ML3.0 2007/02/18 16:20:43 19.420 -155.410 8.6 19 km ( 12 mi) W of Volcano, HI

ML2.3 2007/02/18 15:48:50 40.539 -123.906 21.4 15 km ( 10 mi) E of Hydesville, CA
ML2.6 2007/02/18 15:14:11 38.809 -122.797 3.7 1 km ( 1 mi) NE of The Geysers, CA


18:00-21:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/18 19:05:50 38.832 -122.750 0.0 2 km ( 1 mi) W of Cobb, CA
ML1.5 2007/02/18 18:53:10 33.613 -116.691 10.7 7 km ( 4 mi) NNW of Anza, CA
ML1.1 2007/02/18 18:40:55 39.266 -120.090 3.0 4 km ( 3 mi) WNW of Tahoe Vista, CA
ML1.6 2007/02/18 18:40:40 33.432 -116.069 3.6 4 km ( 3 mi) NW of Desert Shores, CA
ML2.5 2007/02/18 18:37:12 32.553 -115.554 18.3 14 km ( 8 mi) SW of Mexicali, Mexico
ML1.5 2007/02/18 18:12:21 33.654 -116.661 6.5 11 km ( 7 mi) N of Anza, CA
ML1.6 2007/02/18 18:03:28 35.060 -118.306 4.7 12 km ( 7 mi) WNW of Mojave, CA


21:00-24:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/18 22:17:04 36.292 -120.887 4.6 22 km ( 13 mi) NNE of San Lucas, CA
ML1.2 2007/02/18 22:05:08 38.817 -122.792 4.1 2 km ( 2 mi) NNE of The Geysers, CA

M5.6 2007/02/18 21:37:40 6.038 -82.649 10.0 SOUTH OF PANAMA

ML1.5 2007/02/18 21:36:31 35.523 -120.763 5.5 6 km ( 4 mi) SW of Templeton, CA

M5.1 2007/02/18 21:04:57 21.630 120.509 12.2 TAIWAN REGION


February 19, 2007

24 Hour Peak Crustal Resonant Frequency = 0.61 Hz (-66.67 dBv)

00:00-03:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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


ML2.2 2007/02/19 02:45:08 33.260 -116.084 0.9 12 km ( 8 mi) WSW of Salton City, CA
ML1.8 2007/02/19 02:43:54 37.449 -118.346 6.8 10 km ( 6 mi) NNE of Bishop, CA

M5.7 2007/02/19 02:33:44 1.795 30.814 25.0 LAKE ALBERT REGION, DEM REP OF THE CONGO

ML1.4 2007/02/19 02:29:33 39.407 -120.203 11.0 7 km ( 4 mi) N of Truckee, CA
ML1.2 2007/02/19 02:22:05 37.393 -117.104 4.0 17 km ( 11 mi) NE of Tokop, NV
ML1.2 2007/02/19 01:08:44 37.285 -116.424 0.0 51 km ( 32 mi) NE of Beatty, NV
ML1.9 2007/02/19 00:40:16 35.598 -120.846 8.5 13 km ( 8 mi) WNW of Templeton, CA

M4.7 2007/02/19 00:16:58 -15.751 -72.061 139.3 SOUTHERN PERU


03:00 - 06:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/19 04:55:39 -15.309 -173.655 35.0 TONGA

ML2.9 2007/02/19 04:52:00 38.822 -122.794 3.2 3 km ( 2 mi) NNE of The Geysers, CA
ML1.2 2007/02/19 04:43:42 33.764 -116.891 17.9 1 km ( 1 mi) NNE of Valle Vista, CA
ML1.7 2007/02/19 04:40:03 33.163 -116.127 6.6 2 km ( 1 mi) NNE of Ocotillo Wells, CA

M4.5 2007/02/19 04:21:57 50.072 155.485 130.4 KURIL ISLANDS

ML1.2 2007/02/19 04:07:25 37.393 -117.104 0.0 17 km ( 11 mi) NE of Tokop, NV
ML1.3 2007/02/19 03:32:44 37.577 -118.844 7.5 14 km ( 8 mi) ESE of Mammoth Lakes, CA


06:00-09:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/19 08:01:51 33.577 -116.480 22.5 18 km ( 11 mi) E of Anza, CA
ML2.7 2007/02/19 07:07:21 40.922 -124.456 17.5 29 km ( 18 mi) WNW of Eureka, CA

ML3.3 2007/02/19 06:42:48 40.944 -124.608 0.1 41 km ( 25 mi) WNW of Bayview, CA

ML1.2 2007/02/19 06:08:10 37.413 -117.104 16.0 19 km ( 12 mi) NE of Tokop, NV


09:00-12:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/19 11:42:21 12.498 141.671 15.0 MARIANA ISLANDS REGION
M5.5 2007/02/19 11:13:08 5.530 126.340 63.1 MINDANAO, PHILIPPINES

ML2.0 2007/02/19 10:13:12 40.944 -123.493 9.3 17 km ( 11 mi) ENE of Willow Creek, CA
ML1.9 2007/02/19 09:57:59 38.774 -122.748 2.7 5 km ( 3 mi) W of Anderson Springs, CA


12:00-15:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/19 14:56:12 33.262 -116.090 1.6 13 km ( 8 mi) WSW of Salton City, CA

M5.5 2007/02/19 14:33:33 -20.224 173.109 10.0 VANUATU REGION
M5.2 2007/02/19 14:14:51 49.148 -28.422 10.0 NORTHERN MID-ATLANTIC RIDGE

ML2.3 2007/02/19 14:11:26 32.690 -116.024 4.9 6 km ( 4 mi) SSW of Ocotillo, CA
ML1.6 2007/02/19 13:46:54 38.815 -122.781 2.5 3 km ( 2 mi) NE of The Geysers, CA
ML1.5 2007/02/19 12:21:43 33.621 -116.691 11.6 8 km ( 5 mi) NNW of Anza, CA


15:00-18:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/19 17:13:20 37.127 -121.534 7.1 7 km ( 5 mi) NE of San Martin, CA
ML2.9 2007/02/19 15:56:41 38.740 -122.721 1.7 5 km ( 3 mi) SSW of Anderson Springs, CA
ML1.3 2007/02/19 15:17:45 36.087 -117.890 4.4 7 km ( 4 mi) NE of Coso Junction, CA

M5.5 2007/02/19 15:13:20 -4.398 102.912 30.0 SOUTHERN SUMATRA, INDONESIA


18:00-21:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/19 20:43:08 40.229 -124.243 12.8 11 km ( 7 mi) SSE of Petrolia, CA
ML2.1 2007/02/19 20:31:54 35.032 -117.649 2.6 2 km ( 1 mi) NNE of Boron, CA
ML1.7 2007/02/19 20:06:43 33.276 -116.168 10.2 15 km ( 9 mi) NNW of Ocotillo Wells, CA
ML1.8 2007/02/19 19:59:12 36.699 -121.334 3.0 10 km ( 6 mi) S of Tres Pinos, CA
ML1.1 2007/02/19 19:39:36 35.563 -120.816 2.9 10 km ( 6 mi) W of Templeton, CA

M5.5 2007/02/19 19:24:11 -23.076 -70.535 10.0 ANTOFAGASTA, CHILE

ML2.1 2007/02/19 18:40:05 34.311 -118.509 9.0 4 km ( 3 mi) N of Granada Hills, CA
ML2.4 2007/02/19 18:00:43 38.823 -122.788 1.3 3 km ( 2 mi) NNE of The Geysers, CA


21:00-24:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/19 23:54:11 33.690 -116.778 21.0 9 km ( 5 mi) SW of Idyllwild, CA
ML1.3 2007/02/19 23:39:41 37.413 -117.079 0.0 20 km ( 13 mi) NE of Tokop, NV
ML1.4 2007/02/19 22:58:23 37.626 -119.042 4.7 6 km ( 4 mi) WSW of Mammoth Lakes, CA
ML1.2 2007/02/19 22:30:59 38.813 -122.816 2.2 2 km ( 1 mi) NNW of The Geysers, CA


February 20, 2007

Peak Crustal Resonant Frequency = 0.56 Hz (-66.80 dBv)

00:00-03:00 UTC


Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/20 02:02:22 38.795 -122.734 0.9 4 km ( 3 mi) WNW of Anderson Springs, CA
ML1.4 2007/02/20 01:40:56 32.673 -115.933 9.1 9 km ( 6 mi) SE of Ocotillo, CA
ML2.1 2007/02/20 00:26:52 38.760 -122.721 2.0 3 km ( 2 mi) SW of Anderson Springs, CA
ML2.5 2007/02/20 00:25:18 38.761 -122.720 2.4 3 km ( 2 mi) WSW of Anderson Springs, CA


03:00-06:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/20 03:56:47 39.233 -120.081 9.8 3 km ( 2 mi) WSW of Tahoe Vista, CA
ML1.4 2007/02/20 03:30:33 40.547 -124.161 22.2 5 km ( 3 mi) SSW of Fortuna, CA
ML1.4 2007/02/20 03:20:14 37.583 -118.874 6.5 11 km ( 7 mi) ESE of Mammoth Lakes, CA


06:00-09:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/20 08:46:20 32.689 -115.891 6.2 11 km ( 7 mi) ESE of Ocotillo, CA
ML1.4 2007/02/20 08:23:06 34.207 -117.576 9.0 9 km ( 6 mi) N of Rancho Cucamonga, CA

M6.7 2007/02/20 08:04:27 -1.054 127.068 22.5 KEPULAUAN OBI, INDONESIA

ML1.7 2007/02/20 06:42:40 32.982 -116.314 6.5 25 km (15 mi) SW of Ocotillo Wells, CA
ML1.7 2007/02/20 06:39:50 37.569 -118.838 13.1 14 km ( 9 mi) W of Toms Place, CA


09:00-12:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/20 11:33:08 33.264 -116.081 3.5 12 km ( 7 mi) WSW of Salton City, CA
ML1.2 2007/02/20 11:31:27 32.812 -115.713 9.3 3 km ( 2 mi) NW of Seeley, CA

M4.5 2007/02/20 11:30:59 20.086 145.510 120.6 MAUG ISLANDS REG., NORTHERN MARIANA ISL.
M4.9 2007/02/20 11:15:06 47.151 156.127 10.0 EAST OF THE KURIL ISLANDS

ML1.0 2007/02/20 10:18:43 35.642 -120.996 5.5 13 km ( 8 mi) NE of Cambria, CA
ML1.1 2007/02/20 09:30:57 36.772 -121.282 7.9 4 km ( 2 mi) ESE of Tres Pinos, CA
ML1.9 2007/02/20 09:28:59 34.299 -118.153 2.6 11 km ( 7 mi) NNE of La Canada Flintridge, CA

M4.9 2007/02/20 09:23:24 27.710 56.606 71.9 SOUTHERN IRAN


12:00-15:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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


M5.9 2007/02/20 14:25:26 -1.074 126.971 10.0 KEPULAUAN SULA, INDONESIA

ML2.1 2007/02/20 13:45:56 39.240 -122.794 1.5 13 km ( 8 mi) NE of Upper Lake, CA

M5.0 2007/02/20 13:14:42 -1.073 127.144 34.5 KEPULAUAN OBI, INDONESIA

ML1.8 2007/02/20 13:02:37 38.745 -122.732 1.8 5 km ( 3 mi) SW of Anderson Springs, CA


15:00-18:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/20 17:45:55 33.264 -116.093 2.8 13 km ( 8 mi) WSW of Salton City, CA

ML3.1 2007/02/20 17:40:15 32.844 -117.619 3.9 34 km ( 21 mi) W of La Jolla, CA

ML1.5 2007/02/20 17:25:59 35.790 -121.379 5.6 24 km ( 15 mi) NW of San Simeon, CA

M4.8 2007/02/20 17:25:10 -26.833 -70.917 10.0 OFFSHORE ATACAMA, CHILE

ML2.4 2007/02/20 17:03:59 35.791 -121.371 5.7 23 km ( 14 mi) NW of San Simeon, CA
ML2.1 2007/02/20 17:01:40 35.805 -121.343 4.3 23 km ( 14 mi) NW of San Simeon, CA
ML2.8 2007/02/20 16:59:55 35.787 -121.392 5.9 24 km ( 15 mi) NW of San Simeon, CA
ML2.8 2007/02/20 16:49:50 35.790 -121.358 5.2 22 km ( 14 mi) NW of San Simeon, CA

ML3.7 2007/02/20 16:46:13 35.780 -121.382 6.7 23 km ( 14 mi) NW of San Simeon, CA

ML1.3 2007/02/20 16:12:27 33.966 -116.635 11.4 11 km ( 7 mi) SSW of Morongo Valley, CA
ML1.0 2007/02/20 16:06:03 36.921 -121.499 4.1 9 km ( 6 mi) NNE of San Juan Bautista, CA
ML2.1 2007/02/20 15:54:35 38.806 -122.790 1.8 2 km ( 1 mi) ENE of The Geysers, CA
ML1.1 2007/02/20 15:23:18 33.483 -116.485 21.3 19 km ( 12 mi) ESE of Anza, CA


18:00-21:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/20 20:41:01 32.555 -116.178 5.9 27 km ( 17 mi) SW of Ocotillo, CA
ML1.3 2007/02/20 19:43:48 35.738 -121.099 5.3 13 km ( 8 mi) NE of San Simeon, CA


21:00-24:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/20 23:12:32 -11.270 118.830 35.0 SOUTH OF SUMBAWA, INDONESIA

ML1.4 2007/02/20 21:18:34 38.815 -122.794 2.6 2 km ( 1 mi) NNE of The Geysers, CA
ML1.2 2007/02/20 21:13:50 38.818 -122.808 4.0 2 km ( 1 mi) N of The Geysers, CA


February 21, 2007

24 Hour Peak Crustal Resonant Frequency = 0.55 Hz (-67.14 dBv)

00:00-03:00 UTC


Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/21 02:54:37 34.296 -116.830 4.8 4 km ( 2 mi) NNE of Big Bear City, CA

M5.5 2007/02/21 02:19:54 -0.910 127.261 10.0 HALMAHERA, INDONESIA

ML1.3 2007/02/21 02:17:39 38.868 -122.793 1.6 7 km ( 4 mi) WNW of Cobb, CA
ML1.0 2007/02/21 01:41:36 33.370 -116.585 8.9 22 km ( 14 mi) NE of Lake Henshaw, CA
ML1.2 2007/02/21 01:09:49 38.815 -122.818 2.7 2 km ( 1 mi) NNW of The Geysers, CA
ML2.0 2007/02/21 00:28:43 35.055 -117.645 3.7 5 km ( 3 mi) NNE of Boron, CA
ML1.6 2007/02/21 00:06:11 35.448 -120.869 4.1 2 km ( 1 mi) ENE of Cayucos, CA


03:00-06:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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


ML2.2 2007/02/21 05:03:40 38.072 -118.863 8.8 20 km ( 13 mi) SE of Bodie, CA


06:00-09:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/21 08:56:03 36.464 -120.167 17.6 14 km ( 9 mi) ESE of Cantua Creek, CA
ML1.9 2007/02/21 08:03:51 35.945 -121.352 3.5 21 km (13 mi) ESE of Lopez Point, CA
ML1.4 2007/02/21 07:52:54 33.642 -116.558 7.4 14 km ( 9 mi) NE of Anza, CA
ML1.7 2007/02/21 07:07:24 35.724 -121.077 7.8 14 km ( 8 mi) NE of San Simeon, CA
ML1.7 2007/02/21 06:19:31 33.909 -116.883 11.3 3 km ( 2 mi) SSE of Banning, CA

ML3.2 2007/02/21 06:08:40 35.790 -121.358 5.9 22 km ( 14 mi) NW of San Simeon, CA


09:00-12:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/21 11:42:08 38.069 -118.863 8.6 20 km ( 13 mi) SE of Bodie, CA
ML1.4 2007/02/21 11:39:11 33.242 -116.103 0.4 11 km ( 7 mi) NNE of Ocotillo Wells, CA

M5.7 2007/02/21 11:05:29 38.432 39.237 5.0 EASTERN TURKEY

ML1.6 2007/02/21 10:42:28 34.029 -117.245 18.7 2 km ( 1 mi) SSE of Loma Linda, CA
ML1.2 2007/02/21 10:27:56 36.084 -117.649 3.6 21 km ( 13 mi) SSW of Darwin, CA

M4.8 2007/02/21 10:20:01 21.918 143.031 30.0 MARIANA ISLANDS REGION

ML2.0 2007/02/21 09:34:10 35.337 -117.844 6.6 18 km ( 11 mi) W of Randsburg, CA

M4.9 2007/02/21 09:23:10 12.536 95.176 30.7 ANDAMAN ISLANDS, INDIA REGION


12:00-15:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/21 14:50:55 37.551 -118.868 7.2 14 km ( 8 mi) SE of Mammoth Lakes, CA
ML1.4 2007/02/21 13:06:13 33.512 -116.460 10.3 20 km ( 13 mi) ESE of Anza, CA
ML1.5 2007/02/21 12:57:33 34.008 -116.318 12.5 13 km ( 8 mi) S of Joshua Tree, CA


15:00-18:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/21 17:52:34 36.035 -117.520 6.1 27 km ( 17 mi) SSE of Darwin, CA
ML2.4 2007/02/21 16:46:24 39.213 -122.708 10.3 16 km ( 10 mi) NE of Nice, CA
ML2.9 2007/02/21 15:46:53 37.435 -118.844 6.0 20 km ( 13 mi) SW of Toms Place, CA
ML2.4 2007/02/21 15:41:47 31.899 -115.876 0.9 56 km ( 35 mi) NNW of Lazaro Cardenas, Mexico
ML2.2 2007/02/21 15:23:41 39.400 -123.266 2.4 7 km ( 5 mi) E of Willits, CA


18:00-21:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/21 20:43:13 33.401 -116.665 13.2 17 km ( 11 mi) S of Anza, CA
ML1.3 2007/02/21 20:14:54 33.982 -116.815 14.2 9 km ( 6 mi) NNW of Cabazon, CA


21:00-24:00 UTC

Return to Table of Contents Graphic:(AE)Infrasonic Spectrogram 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 2007/02/21 23:13:37 33.539 -116.710 15.5 4 km ( 2 mi) WSW of Anza, CA
ML1.2 2007/02/21 23:01:54 35.628 -117.587 6.1 8 km ( 5 mi) E of Ridgecrest, CA
ML1.8 2007/02/21 22:41:01 36.200 -115.304 0.0 7 km ( 5 mi) W of Las Vegas, NV
ML1.5 2007/02/21 22:32:13 36.484 -115.418 0.0 25 km ( 16 mi) ESE of Indian Springs, NV

ML3.0 2007/02/21 22:21:56 37.183 -121.957 4.9 4 km ( 2 mi) NE of Lexington Hills, CA



Frank Condon

Independent Earthquake Precursor Research Consultant

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