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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 22-28, 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 26, 2007: Peak Crustal Resonant Frequency = 0.18 Hz (-60.03 dBv)


Magnitude 1.2 - local magnitude (ML)
Time Monday, February 26, 2007 at 6:17:26 AM (PST)
Monday, February 26, 2007 at 14:17:26 (UTC)
Distance from Desert Shores, CA - 17 km (11 miles) WSW (248 degrees)
Borrego Springs, CA - 18 km (11 miles) NE (53 degrees)
Salton Sea Beach, CA - 19 km (12 miles) W (260 degrees)
Palm Springs, CA - 61 km (38 miles) SSE (151 degrees)
San Diego, CA - 107 km (67 miles) NE (54 degrees)

Coordinates 33 deg. 20.7 min. N (33.346N), 116 deg. 12.9 min. W (116.214W)
Depth 11.7 km (7.3 miles)

Event ID# ci10233317

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 22, 2007: Peak Crustal Resonant Frequency = 0.56 Hz (-66.71 dBv)


23 FEB 2007 ( 54)

ot = 04:16:13.68 +/- 1.95 GULF OF CALIFORNIA
lat = 25.795 +/- 18.6
lon = -110.508 +/- 9.2 MAGNITUDE 4.3 (GS)
dep = 10.0 (geophysicist)

85 km (55 miles) ESE of Loreto, Baja California Sur, Mexico (pop 10,000)
155 km (95 miles) W of Los Mochis, Sinaloa, Mexico (pop 200,000)
175 km (110 miles) SW of Navojoa, Sonora, Mexico
1365 km (850 miles) WNW of MEXICO CITY, D.F., Mexico

23 FEB 2007 ( 54)

ot = 07:12:16.44 +/- 0.89 GULF OF CALIFORNIA
lat = 25.770 +/- 8.9
lon = -110.568 +/- 5.6 MAGNITUDE 4.7 (GS)
dep = 10.0 (geophysicist)

80 km (50 miles) ESE of Loreto, Baja California Sur, Mexico (pop 10,000)
160 km (100 miles) W of Los Mochis, Sinaloa, Mexico (pop 200,000)
180 km (110 miles) N of La Paz, Baja California Sur, Mexico
1365 km (850 miles) WNW of MEXICO CITY, D.F., Mexico

23 FEB 2007 ( 54)

ot = 07:30:12.96 +/- 0.63 GULF OF CALIFORNIA
lat = 26.033 +/- 6.4
lon = -110.425 +/- 5.0 MAGNITUDE 4.7 (GS)
dep = 10.0 (geophysicist)

90 km (55 miles) E of Loreto, Baja California Sur, Mexico (pop 10,000)
150 km (90 miles) WNW of Los Mochis, Sinaloa, Mexico (pop 200,000)
150 km (95 miles) SW of Navojoa, Sonora, Mexico (pop 98,000)
1365 km (850 miles) NW of MEXICO CITY, D.F., Mexico

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 22, 2007

24 Hour Peak Crustal Resonant Frequency = 0.56 Hz (-66.71 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 2007/02/22 02:55:56 37.456 -118.844 7.6 19 km ( 12 mi) SW of Toms Place, CA
ML2.3 2007/02/22 02:38:02 35.987 -120.552 4.7 14 km ( 9 mi) NW of Parkfield, CA
ML1.7 2007/02/22 02:05:02 34.832 -117.100 0.0 5 km ( 3 mi) S of Lenwood, CA

M4.6 2007/02/22 01:55:36 -32.075 -71.424 60.4 COQUIMBO, CHILE

ML2.2 2007/02/22 01:06:11 35.045 -117.656 0.9 3 km ( 2 mi) N of Boron, CA
ML2.3 2007/02/22 01:00:54 38.816 -122.453 6.3 9 km ( 6 mi) E of Hidden Valley Lake, CA
ML2.9 2007/02/22 00:41:59 34.324 -116.846 4.3 7 km ( 4 mi) N of Big Bear City, 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


ML1.6 2007/02/22 05:57:50 37.971 -118.667 9.2 39 km ( 25 mi) SSW of Qualeys Camp, NV

ML3.0 2007/02/22 04:55:16 18.220 -68.128 133.1 76 km ( 47 mi) SE of Higüey, Dominican Republic


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


ML2.8 2007/02/22 08:57:42 31.754 -115.602 14.6 40 km ( 25 mi) NNE of Lazaro Cardenas, Mexico
ML1.5 2007/02/22 08:55:20 32.684 -115.866 12.2 14 km ( 9 mi) ESE of Ocotillo, CA
ML2.8 2007/02/22 08:24:51 38.841 -122.738 0.9 1 km ( 1 mi) WNW of Cobb, CA
ML1.1 2007/02/22 06:50:17 32.694 -116.051 10.5 7 km ( 4 mi) SW of Ocotillo, 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


ML4.6 2007/02/22 11:58:04 46.725 152.810 10.0 KURIL ISLANDS

ML1.5 2007/02/22 11:26:59 33.885 -116.674 16.7 9 km ( 6 mi) ESE of Cabazon, CA
ML1.5 2007/02/22 11:12:58 32.714 -116.060 7.4 7 km ( 4 mi) WSW of Ocotillo, CA
ML1.1 2007/02/22 10:08:53 33.717 -116.761 17.9 5 km ( 3 mi) SW of Idyllwild, CA
ML1.5 2007/02/22 09:27:28 32.663 -115.986 2.6 9 km ( 5 mi) S of Ocotillo, 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


ML1.5 2007/02/22 14:35:27 32.985 -116.316 6.6 25 km ( 15 mi) SW 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


ML2.3 2007/02/22 17:34:03 36.028 -117.519 3.8 28 km ( 17 mi) SSE of Darwin, CA
ML1.6 2007/02/22 16:54:41 35.168 -118.319 28.4 13 km ( 8 mi) ENE of Tehachapi, CA
ML1.9 2007/02/22 16:42:37 38.795 -122.805 3.9 0 km ( 0 mi) SSE of The Geysers, CA

ML3.0 2007/02/22 15:23:40 19.625 -156.510 13.6 54 km ( 33 mi) W of Kailua, HI

ML2.2 2007/02/22 15:19:05 34.373 -117.693 11.4 6 km ( 4 mi) WNW of Wrightwood, CA
ML2.1 2007/02/22 15:13:04 36.399 -120.968 0.8 22 km ( 13 mi) SE of Pinnacles, CA
ML1.6 2007/02/22 15:12:06 32.713 -116.044 8.5 5 km ( 3 mi) WSW of Ocotillo, 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


ML1.6 2007/02/22 19:44:59 36.755 -121.255 9.4 7 km ( 4 mi) SE of Tres Pinos, CA
ML1.3 2007/02/22 18:49:52 38.819 -122.806 4.9 2 km ( 1 mi) N 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


ML2.2 2007/02/22 23:52:18 40.523 -117.138 0.0 21 km ( 13 mi) SW of Battle Mountain, NV
ML1.2 2007/02/22 22:22:50 33.650 -116.687 12.7 11 km ( 7 mi) N of Anza, CA
ML2.5 2007/02/22 21:47:29 35.791 -121.356 5.4 22 km ( 14 mi) NW of San Simeon, CA
ML2.3 2007/02/22 21:24:53 38.812 -122.815 3.0 2 km ( 1 mi) NNW of The Geysers, CA
ML2.0 2007/02/22 21:21:26 32.548 -115.638 10.0 20 km ( 12 mi) SW of Calexico, CA


February 23, 2007

24 Hour Peak Crustal Resonant Frequency = 0.56 Hz (-66.93 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 2007/02/23 02:36:52 37.178 -121.967 4.6 3 km ( 2 mi) NE of Lexington Hills, CA
ML1.4 2007/02/23 01:31:56 36.117 -120.190 4.6 12 km ( 7 mi) NNW of Avenal, CA
ML1.4 2007/02/23 00:53:30 33.842 -117.408 9.8 6 km ( 4 mi) SW of Woodcrest, CA

ML3.5 2007/02/23 00:25:16 40.123 -116.299 5.0 38 km ( 24 mi) SE of Tenabo, 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 2007/02/23 05:55:05 40.271 -121.343 1.7 10 km ( 6 mi) WSW of Chester, CA

ML4.3 2007/02/23 04:16:13 25.795 -110.508 10.0 88 km ( 55 mi) ESE of Loreto, Baja California Sur, Mexico

ML1.7 2007/02/23 04:11:49 33.144 -116.522 14.6 10 km ( 6 mi) NE of Julian, 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


M4.8 2007/02/23 08:37:08 46.513 153.230 10.0 KURIL ISLANDS

ML2.2 2007/02/23 08:28:08 36.464 -121.043 5.7 12 km ( 7 mi) SE of Pinnacles, CA
ML1.4 2007/02/23 08:01:51 39.584 -118.116 0.0 12 km ( 7 mi) SSW of Dixie Valley, NV
ML2.1 2007/02/23 07:54:29 33.352 -116.384 11.7 12 km ( 7 mi) N of Borrego Springs, CA

ML4.7 2007/02/23 07:30:13 26.033 -110.425 10.0 90 km (55 miles) E of Loreto, Baja California Sur, Mexico
ML3.4 2007/02/23 07:29:49 19.764 -63.711 5.9 132 km ( 82 mi) NNE of Settlement, British Virgin Islands
ML4.7 2007/02/23 07:12:16 25.770 -110.568 10.0 80 km (50 miles) ESE of Loreto, Baja California Sur, Mexico

ML1.1 2007/02/23 06:48:19 33.522 -116.520 18.8 15 km ( 9 mi) ESE 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


ML1.9 2007/02/23 11:37:13 32.986 -117.488 0.2 21 km ( 13 mi) W of Del Mar, CA
ML1.7 2007/02/23 11:28:51 35.989 -120.037 5.0 7 km ( 4 mi) WSW of Kettleman City, CA

M4.4 2007/02/23 09:58:17 14.844 -91.953 208.9 GUATEMALA

ML4.4 2007/02/23 09:38:19 43.143 -126.854 10.0 197 km (122 mi) WNW of Port Orford, OR


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


M5.0 2007/02/23 14:48:22 10.894 -61.635 77.6 TRINIDAD REGION, TRINIDAD AND TOBAGO
M5.0 2007/02/23 14:12:30 -1.390 -77.799 187.0 ECUADOR

ML1.6 2007/02/23 12:36:14 36.662 -121.401 11.2 14 km ( 9 mi) NE of Chualar, CA
ML2.1 2007/02/23 12:18:32 32.149 -116.422 1.9 36 km ( 22 mi) NNE of Ensenada, Mexico


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 2007/02/23 15:53:29 33.785 -116.675 0.0 6 km ( 4 mi) NE of Idyllwild, 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


M5.6 2007/02/23 19:55:49 -45.260 -72.019 23.9 AISEN, CHILE

ML1.4 2007/02/23 19:14:06 36.102 -117.895 6.0 8 km ( 5 mi) NE of Coso Junction, 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


ML3.4 2007/02/23 23:46:15 37.865 -122.241 11.4 3 km ( 2 mi) ESE of Berkeley, CA

ML1.3 2007/02/23 23:16:23 34.105 -116.671 10.3 10 km ( 6 mi) NW of Morongo Valley, CA
ML2.1 2007/02/23 22:41:34 36.357 -121.121 5.5 12 km ( 7 mi) ENE of Greenfield, CA


February 24, 2007

24 Hour Peak Crustal Resonant Frequency = 0.55 Hz (-66.55 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 2007/02/24 03:31:28 39.391 -121.498 4.6 6 km ( 4 mi) SSE of Palermo, CA
ML1.9 2007/02/24 03:20:48 37.867 -122.237 10.1 3 km ( 2 mi) E of Berkeley, CA

M6.4 2007/02/24 02:36:22 -6.971 -80.333 10.0 NEAR THE COAST OF NORTHERN PERU

ML1.7 2007/02/24 01:33:44 39.354 -123.288 1.4 8 km ( 5 mi) SE of Willits, CA
ML1.8 2007/02/24 01:18:31 38.834 -122.798 2.0 4 km ( 3 mi) N of The Geysers, CA
ML1.2 2007/02/24 00:41:08 33.454 -116.570 14.2 15 km ( 9 mi) SE of Anza, CA
ML2.6 2007/02/24 00:26:26 34.987 -116.947 5.1 15 km ( 9 mi) NNE of Barstow, 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 2007/02/24 05:05:52 37.812 -121.964 10.5 1 km ( 1 mi) E of Danville, CA

M5.0 2007/02/24 04:05:30 1.621 116.132 10.0 KALIMANTAN, INDONESIA


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


M5.5 2007/02/24 08:07:59 -20.213 173.120 30.1 VANUATU REGION

ML1.5 2007/02/24 07:53:34 32.681 -115.848 7.6 15 km ( 10 mi) ESE of Ocotillo, CA

M5.5 2007/02/24 07:33:33 1.115 -85.194 23.6 OFF THE COAST OF ECUADOR


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


ML3.2 2007/02/24 11:36:49 18.836 -64.248 38.2 14 km ( 9 mi) NNE of Settlement, British Virgin Islands

ML1.5 2007/02/24 10:46:18 36.583 -121.180 4.1 7 km ( 4 mi) NNW of Pinnacles, CA

M4.8 2007/02/24 10:31:35 1.108 -85.230 10.0 OFF THE COAST OF ECUADOR

ML1.3 2007/02/24 10:25:18 37.172 -121.960 3.2 3 km ( 2 mi) NE of Lexington Hills, CA
ML1.3 2007/02/24 10:11:39 33.193 -115.589 4.7 5 km ( 3 mi) ENE of Obsidian Butte, CA
ML1.9 2007/02/24 09:59:03 33.433 -116.452 11.3 22 km ( 14 mi) NNW of Borrego Springs, CA

ML3.5 2007/02/24 09:56:40 19.366 -64.537 80.4 74 km ( 46 mi) NNW of Settlement, British Virgin 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


M5.2 2007/02/24 13:32:54 -21.534 -67.618 42.5 POTOSI, BOLIVIA

ML1.3 2007/02/24 12:52:36 33.852 -116.968 17.6 7 km ( 4 mi) N of San Jacinto, CA
ML1.4 2007/02/24 12:08:09 33.929 -117.183 16.7 4 km ( 3 mi) E of Moreno Valley, 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


ML1.5 2007/02/24 17:48:18 33.767 -116.149 4.2 9 km ( 6 mi) NE of Indio, CA
ML1.8 2007/02/24 17:41:57 38.830 -122.809 2.5 4 km ( 2 mi) N of The Geysers, CA
ML1.9 2007/02/24 17:22:18 33.678 -117.368 0.0 2 km ( 1 mi) W of Lake Elsinore, CA
ML2.9 2007/02/24 17:00:44 37.090 -119.879 13.8 14 km ( 9 mi) SW of Yosemite Lakes, CA
ML2.0 2007/02/24 16:46:20 38.815 -122.818 0.0 2 km ( 1 mi) NNW of The Geysers, CA
ML1.1 2007/02/24 16:41:09 33.465 -116.451 15.7 23 km ( 14 mi) ESE of Anza, CA
ML1.4 2007/02/24 16:28:08 33.514 -116.439 8.0 22 km ( 14 mi) ESE of Anza, CA
ML2.0 2007/02/24 15:30:15 38.796 -122.738 1.7 5 km ( 3 mi) SSW of Cobb, CA
ML2.0 2007/02/24 15:10:48 32.577 -115.748 2.7 25 km ( 15 mi) SSW of Seeley, 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


ML1.9 2007/02/24 20:35:03 35.785 -121.450 1.1 28 km ( 17 mi) SSE of Lopez Point, CA
ML1.3 2007/02/24 20:03:56 33.110 -116.476 26.2 11 km ( 7 mi) ENE of Julian, CA

M5.3 2007/02/24 19:47:35 46.784 152.435 10.0 KURIL ISLANDS

ML1.7 2007/02/24 19:35:01 37.179 -121.960 4.8 3 km ( 2 mi) NE of Lexington Hills, CA

M5.2 2007/02/24 18:53:45 -1.033 126.823 51.9 KEPULAUAN SULA, INDONESIA

ML2.9 2007/02/24 18:39:28 39.353 -123.279 0.1 8 km ( 5 mi) SE of Willits, CA
ML1.4 2007/02/24 18:14:06 37.653 -122.052 4.3 2 km ( 2 mi) ENE of Hayward, 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


ML5.4 2007/02/24 23:43:43 51.406 -178.456 35.0 ANDREANOF ISLANDS, ALEUTIAN IS., ALASKA

ML1.4 2007/02/24 23:31:07 36.032 -117.810 3.5 13 km ( 8 mi) E of Coso Junction, CA
ML2.3 2007/02/24 22:58:20 34.691 -116.307 3.0 14 km ( 9 mi) WSW of Ludlow, CA
ML1.5 2007/02/24 22:45:48 33.543 -116.637 13.8 3 km ( 2 mi) ESE of Anza, CA
ML2.1 2007/02/24 21:53:22 35.001 -116.264 4.9 33 km ( 20 mi) NNW of Ludlow, CA
ML1.2 2007/02/24 21:20:42 36.007 -120.588 0.8 18 km ( 11 mi) NW of Parkfield, CA


February 25, 2007

24 Hour Peak Crustal Resonant Frequency = 0.54 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


ML1.4 2007/02/25 02:42:05 34.136 -117.467 7.2 4 km ( 3 mi) N of Fontana, CA
ML1.6 2007/02/25 02:03:30 37.539 -116.013 0.0 36 km ( 22 mi) WSW of Tempiute, NV

M5.0 2007/02/25 01:49:42 33.258 90.578 35.0 XIZANG-QINGHAI BORDER REGION

ML4.7 2007/02/25 01:18:42 26.320 -110.296 62.2 110 km ( 70 mi) ENE of Loreto, Baja California Sur, Mexico

ML1.8 2007/02/25 01:17:26 38.809 -122.791 1.9 2 km ( 1 mi) NE of The Geysers, CA
ML1.8 2007/02/25 01:17:03 35.557 -120.779 0.4 6 km ( 4 mi) W of Templeton, CA
ML2.5 2007/02/25 01:13:37 33.475 -116.480 10.3 20 km ( 12 mi) ESE of Anza, CA

ML4.6 2007/02/25 00:37:13 51.254 -178.618 15.0 ANDREANOF ISLANDS, ALEUTIAN IS., ALASKA

ML1.5 2007/02/25 00:01:29 33.377 -116.423 8.0 15 km ( 9 mi) NNW of Borrego 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


ML1.2 2007/02/25 05:49:29 35.528 -120.807 3.2 9 km ( 6 mi) WSW of Templeton, CA
ML1.6 2007/02/25 05:41:06 35.396 -118.636 9.7 18 km (11 mi) NNW of Keene, CA
ML1.2 2007/02/25 05:36:29 37.638 -117.659 12.0 27 km (17 mi) NNE of Sylvania, NV
ML1.2 2007/02/25 05:36:29 33.626 -116.973 45.1 13 km ( 8 mi) S of Hemet, CA
ML1.9 2007/02/25 05:36:17 37.450 -118.844 10.2 19 km (12 mi) SW of Toms Place, CA
ML2.6 2007/02/25 05:34:31 37.859 -122.246 9.4 3 km ( 2 mi) ESE of Berkeley, CA

M4.7 2007/02/25 05:02:55 -9.394 -75.882 51.5 CENTRAL PERU

ML2.0 2007/02/25 04:54:21 33.653 -118.237 0.1 15 km ( 9 mi) SE of Rolling Hills, CA
ML1.6 2007/02/25 04:41:36 38.057 -117.376 0.0 13 km ( 8 mi) W of Tonopah, NV


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


ML1.5 2007/02/25 08:46:18 35.681 -121.173 1.1 4 km ( 3 mi) NNE of San Simeon, CA
ML2.1 2007/02/25 08:35:28 39.351 -123.283 0.9 8 km ( 5 mi) SE of Willits, CA
ML1.0 2007/02/25 08:04:10 33.704 -116.750 21.9 6 km ( 4 mi) SW of Idyllwild, CA
ML1.8 2007/02/25 07:04:49 38.809 -122.791 1.9 2 km ( 1 mi) NE of The Geysers, CA
ML1.7 2007/02/25 06:07:26 38.815 -122.793 4.1 2 km ( 1 mi) NNE of The Geysers, 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


ML3.2 2007/02/25 11:59:41 32.631 -116.013 2.5 12 km ( 8 mi) S of Ocotillo, CA

ML1.3 2007/02/25 11:54:11 36.052 -117.712 7.5 21 km ( 13 mi) E of Coso Junction, CA
ML2.0 2007/02/25 11:47:24 38.817 -122.803 1.1 2 km ( 1 mi) N of The Geysers, CA

M4.9 2007/02/25 11:41:32 33.834 136.909 68.4 NEAR S. COAST OF WESTERN HONSHU, JAPAN

ML1.4 2007/02/25 11:33:12 37.477 -117.685 0.0 9 km ( 6 mi) NNE of Sylvania, NV
ML1.9 2007/02/25 11:32:56 37.970 -118.657 10.3 39 km ( 24 mi) SSW of Qualeys Camp, NV
ML1.8 2007/02/25 11:27:17 59.886 -151.658 46.2 8 km ( 5 mi) SSE of Happy Valley, AK

ML3.1 2007/02/25 11:24:19 37.099 -104.773 5.0 14 km ( 9 mi) WSW of Cokedale, CO

ML2.3 2007/02/25 11:20:10 37.908 -118.609 8.5 39 km ( 24 mi) N of Toms Place, CA
ML2.2 2007/02/25 10:37:21 36.991 -121.471 5.1 10 km ( 6 mi) ESE of Gilroy, CA
ML2.4 2007/02/25 09:47:22 39.882 -117.252 16.0 39 km ( 24 mi) NNE of Petersons Mill, NV

ML5.0 2007/02/25 09:40:33 52.701 -174.107 199.0 ANDREANOF ISLANDS, ALEUTIAN IS., ALASKA
M4.9 2007/02/25 09:13:55 73.323 7.860 10.0 GREENLAND SEA

ML3.2 2007/02/25 09:00:59 18.287 -68.006 98.2 80 km ( 50 mi) W of Rincón, PR


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


M4.9 2007/02/25 14:32:41 60.825 166.563 40.9 NEAR THE EAST COAST OF KORYAKIA, RUSSIA

ML1.4 2007/02/25 13:53:07 32.659 -115.860 6.9 16 km ( 10 mi) SE of Ocotillo, CA
ML2.0 2007/02/25 13:34:48 37.277 -121.127 11.1 10 km ( 6 mi) WSW of Newman, CA
ML1.6 2007/02/25 13:16:43 32.635 -115.998 3.6 12 km ( 7 mi) S of Ocotillo, 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


ML1.0 2007/02/25 17:21:33 38.822 -122.826 1.7 3 km ( 2 mi) NNW of The Geysers, CA

ML3.5 2007/02/25 17:02:27 37.299 -121.093 4.4 6 km ( 4 mi) WSW of Newman, CA

ML2.2 2007/02/25 17:00:43 32.664 -116.109 9.4 13 km ( 8 mi) SW of Ocotillo, CA
ML2.9 2007/02/25 16:04:43 38.777 -122.753 2.1 5 km ( 3 mi) ESE of The Geysers, CA
ML2.0 2007/02/25 15:25:16 33.477 -115.793 0.0 15 km ( 9 mi) ESE of North Shore, CA
ML2.1 2007/02/25 15:15:03 36.460 -121.036 5.8 12 km ( 8 mi) SE of Pinnacles, CA

ML5.0 2007/02/25 15:03:47 25.875 -110.591 10.0 78 km ( 48 mi) ESE of Loreto, Mexico
ML5.9 2007/02/25 15:00:41 26.145 -110.430 10.0 93 km ( 58 mi) E of Loreto, Mexico


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


M5.5 2007/02/25 20:47:28 -29.184 -177.158 10.0 KERMADEC ISLANDS, NEW ZEALAND

ML1.3 2007/02/25 20:23:34 34.506 -118.099 14.0 8 km ( 5 mi) S of Palmdale, CA
ML1.5 2007/02/25 19:51:41 35.813 -121.480 8.7 24 km ( 15 mi) SSE of Lopez Point, CA

ML3.1 2007/02/25 19:00:33 19.018 -64.467 52.7 36 km ( 22 mi) NNW of Settlement, British Virgin Islands


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


ML2.5 2007/02/25 23:14:44 34.861 -119.240 11.9 8 km ( 5 mi) W of Pine Mountain Club, CA
ML2.6 2007/02/25 23:05:50 32.205 -115.859 8.4 61 km ( 38 mi) SSE of Ocotillo, CA
ML1.5 2007/02/25 22:59:30 34.519 -118.118 13.4 7 km ( 4 mi) SSW of Palmdale, CA
ML1.4 2007/02/25 22:37:16 34.438 -116.259 9.0 26 km ( 16 mi) NW of Twentynine Palms Base, CA
ML2.0 2007/02/25 22:23:18 35.786 -121.369 5.6 23 km ( 14 mi) NW of San Simeon, CA
ML2.4 2007/02/25 22:15:17 35.783 -121.382 5.6 23 km ( 14 mi) NW of San Simeon, CA
ML1.6 2007/02/25 22:10:41 34.145 -117.467 7.0 5 km ( 3 mi) N of Fontana, CA
ML1.3 2007/02/25 22:00:58 36.605 -121.089 7.0 9 km ( 6 mi) NNE of Pinnacles, CA

M5.4 2007/02/25 21:53:14 73.179 6.898 10.0 GREENLAND SEA


February 26, 2007

24 Hour Peak Crustal Resonant Frequency = 0.18 Hz (-60.03 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


ML2.3 2007/02/26 02:29:33 37.219 -119.382 22.0 12 km ( 7 mi) E of North Fork, CA
ML2.1 2007/02/26 00:45:43 37.328 -121.072 0.3 5 km ( 3 mi) WNW of Newman, CA

M4.8 2007/02/26 00:19:25 -7.131 -80.557 35.0 OFF THE COAST OF NORTHERN PERU

ML1.6 2007/02/26 00:03:21 39.641 -122.841 1.3 10 km ( 6 mi) W of Alder 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 2007/02/26 05:58:55 36.263 -115.401 0.0 16 km ( 10 mi) NNW of Summerlin South, NV
ML2.2 2007/02/26 05:09:03 32.247 -115.886 0.0 56 km ( 35 mi) S of Ocotillo, CA
ML1.8 2007/02/26 04:16:11 36.074 -120.668 0.1 22 km ( 14 mi) ENE of San Ardo, CA
ML2.4 2007/02/26 04:10:11 36.056 -120.632 4.3 25 km ( 15 mi) E of San Ardo, CA
ML1.8 2007/02/26 03:54:06 36.884 -121.622 7.7 2 km ( 1 mi) ESE of Aromas, CA

ML3.1 2007/02/26 03:31:07 18.595 -64.135 55.6 22 km ( 14 mi) NNE of West End, British Virgin Islands
ML3.4 2007/02/26 03:24:49 17.905 -68.323 89.6 89 km ( 56 mi) SSE of Higüey, Dominican Republic


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


M4.9 2007/02/26 08:49:00 9.786 43.073 10.0 ETHIOPIA

ML1.5 2007/02/26 07:25:41 37.578 -118.881 7.9 11 km ( 7 mi) SE of Mammoth Lakes, CA
ML2.7 2007/02/26 07:18:23 36.242 -120.682 14.7 19 km ( 12 mi) S of New Idria, CA

M4.5 2007/02/26 06:39:19 16.735 -98.848 30.0 GUERRERO, MEXICO


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 2007/02/26 11:43:20 35.546 -120.760 4.9 5 km ( 3 mi) W of Templeton, CA ML1.8 2007/02/26 11:26:58 32.662 -116.000 2.5 9 km ( 5 mi) S of Ocotillo, CA

ML3.3 2007/02/26 10:54:56 19.279 -64.617 16.4 69 km ( 43 mi) NNW of Settlement, British Virgin Islands

ML1.1 2007/02/26 10:45:07 36.088 -120.693 0.5 20 km ( 13 mi) ENE of San Ardo, CA

M5.3 2007/02/26 09:01:23 -15.930 167.514 56.6 VANUATU


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


ML1.2 2007/02/26 14:17:26 33.346 -116.214 11.7 17 km ( 11 mi) WSW of Desert Shores, CA

ML5.4 2007/02/26 12:19:54 40.642 -124.870 0.4 52 km ( 32 mi) W of Ferndale, CA

ML2.3 2007/02/26 12:06:46 37.590 -118.823 5.7 13 km ( 8 mi) WNW of Toms Place, CA
ML1.9 2007/02/26 12:02:34 37.904 -118.615 7.7 38 km ( 24 mi) N 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


M5.1 2007/02/26 17:58:28 -20.160 -69.280 120.6 TARAPACA, CHILE

ML1.6 2007/02/26 17:00:17 33.403 -116.519 22.3 22 km ( 14 mi) SE of Anza, CA
ML2.9 2007/02/26 16:13:26 40.652 -124.796 2.5 46 km ( 28 mi) W of Ferndale, CA
ML2.0 2007/02/26 16:12:43 37.639 -122.496 7.0 2 km ( 1 mi) NNW of Pacifica, CA
ML2.8 2007/02/26 15:55:06 38.391 -122.575 3.9 5 km ( 3 mi) NW of Glen Ellen, CA
ML2.8 2007/02/26 15:09:18 34.831 -117.168 7.3 8 km ( 5 mi) SW of Lenwood, CA
ML1.5 2007/02/26 15:07:07 32.703 -116.012 6.4 4 km ( 3 mi) SSW of Ocotillo, 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 2007/02/26 20:31:16 33.226 -116.118 7.9 9 km ( 6 mi) N of Ocotillo Wells, CA
ML1.5 2007/02/26 19:52:32 34.492 -116.835 6.2 11 km ( 7 mi) ENE of Lucerne Valley, CA

ML4.8 2007/02/26 19:39:17 52.833 -174.029 222.9 ANDREANOF ISLANDS, ALEUTIAN IS., ALASKA

ML1.1 2007/02/26 19:27:42 33.290 -116.185 19.9 17 km ( 11 mi) NNW of Ocotillo Wells, CA
ML1.4 2007/02/26 19:17:35 33.485 -116.396 12.4 23 km ( 14 mi) SSW of La Quinta, CA
ML2.6 2007/02/26 18:18:20 32.634 -116.004 1.8 12 km ( 7 mi) S of Ocotillo, 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


M5.7 2007/02/26 23:49:53 -44.627 35.483 10.0 PRINCE EDWARD ISLANDS REGION

ML3.0 2007/02/26 23:35:27 40.621 -124.875 23.9 52 km ( 32 mi) W of Ferndale, CA

ML1.1 2007/02/26 22:33:47 36.488 -115.618 12.0 11 km ( 7 mi) SSE of Indian Springs, NV
ML1.7 2007/02/26 21:48:08 37.178 -121.964 4.8 3 km ( 2 mi) NE of Lexington Hills, CA
ML1.5 2007/02/26 21:21:12 36.054 -120.654 0.1 23 km ( 14 mi) E of San Ardo, CA


February 27, 2007

Peak Crustal Resonant Frequency = 0.55 Hz (-66.75 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


ML3.4 2007/02/27 02:35:29 18.892 -64.449 17.6 23 km ( 14 mi) NW of Settlement, British Virgin Islands

ML1.7 2007/02/27 02:01:38 38.041 -116.050 0.0 33 km ( 20 mi) ESE of Warm Springs, NV
ML2.0 2007/02/27 01:39:57 38.624 -122.805 2.4 5 km ( 3 mi) E of Healdsburg, CA
ML1.7 2007/02/27 01:34:56 33.995 -116.882 21.3 7 km ( 4 mi) NNE of Banning, CA
ML1.2 2007/02/27 01:09:59 36.472 -114.944 16.0 9 km ( 6 mi) W of Dry Lake, NV

M5.0 2007/02/27 00:44:23 -20.160 172.908 126.7 VANUATU REGION

ML1.6 2007/02/27 00:11:18 35.036 -117.670 0.0 2 km ( 2 mi) NNW of Boron, 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


ML3.5 2007/02/27 04:24:39 19.579 -68.290 29.6 115 km ( 72 mi) NNE of Higuey, Dominican Republic

ML2.1 2007/02/27 03:15:00 38.622 -122.805 5.4 5 km ( 3 mi) E of Healdsburg, CA

ML3.3 2007/02/27 03:09:32 18.892 -64.574 5.1 32 km ( 20 mi) NW 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


ML1.7 2007/02/27 07:04:35 38.004 -118.757 8.5 32 km ( 20 mi) SE of Bodie, CA

M4.8 2007/02/27 06:36:42 63.017 -22.943 5.0 ICELAND REGION
M4.7 2007/02/27 05:51:51 63.287 -23.794 10.0 ICELAND REGION


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


ML4.2 2007/02/27 11:44:43 26.523 -110.180 10.0 64 km ( 40 mi) WSW of Huatabampo, Mexico

ML1.9 2007/02/27 11:20:50 38.105 -116.227 0.0 16 km ( 10 mi) SE of Warm Springs, NV
ML1.5 2007/02/27 10:50:20 38.105 -116.252 0.0 14 km ( 9 mi) SE of Warm Springs, NV
ML1.6 2007/02/27 10:42:42 35.325 -118.555 4.8 10 km ( 6 mi) NNE of Keene, CA
ML1.7 2007/02/27 10:27:57 38.871 -122.439 11.3 13 km ( 8 mi) NE of Hidden Valley Lake, CA

ML3.0 2007/02/27 10:16:00 19.244 -66.438 27.2 87 km ( 54 mi) N of Brenas, PR

ML1.0 2007/02/27 10:09:15 35.998 -120.695 0.8 18 km ( 11 mi) NNE of Bradley, CA
ML1.5 2007/02/27 09:44:09 35.702 -121.016 9.6 13 km ( 8 mi) WSW of Lake Nacimiento, CA

ML5.1 2007/02/27 09:42:42 16.876 -61.554 61.0 24 km ( 15 mi) SE of Freetown, Antigua & Barbuda

ML1.3 2007/02/27 09:19:39 37.570 -118.875 9.6 12 km ( 7 mi) SE of Mammoth Lakes, 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


ML1.9 2007/02/27 14:52:10 38.825 -122.869 2.8 6 km ( 4 mi) WNW of The Geysers, CA
ML1.9 2007/02/27 14:43:59 35.664 -118.100 10.9 11 km ( 7 mi) ESE of Onyx, CA
ML1.7 2007/02/27 13:55:33 37.569 -118.866 8.3 12 km ( 8 mi) SE of Mammoth Lakes, CA
ML2.3 2007/02/27 13:27:52 39.470 -123.106 4.7 14 km ( 9 mi) WNW of Lake Pillsbury, CA
ML1.7 2007/02/27 12:27:08 38.775 -122.752 1.1 5 km ( 3 mi) W 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 2007/02/27 17:29:59 32.685 -116.033 10.1 7 km ( 4 mi) SSW of Ocotillo, CA
ML2.2 2007/02/27 17:16:15 38.828 -122.870 1.4 6 km ( 4 mi) WNW of The Geysers, CA

M5.3 2007/02/27 17:01:04 -16.435 -172.069 9.9 SAMOA ISLANDS REGION

ML1.7 2007/02/27 16:19:19 33.915 -118.344 0.0 1 km ( 0 mi) ESE of Hawthorne, CA
ML1.7 2007/02/27 15:31:35 34.737 -116.295 6.9 12 km ( 8 mi) W of Ludlow, CA
ML1.4 2007/02/27 15:22:10 33.026 -116.401 10.1 18 km ( 11 mi) ESE of Julian, 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


ML2.0 2007/02/27 20:21:22 34.104 -117.975 13.4 1 km ( 1 mi) SW of Irwindale, CA

ML4.8 2007/02/27 20:08:09 25.984 -110.449 10.0 90 km ( 56 mi) E of Loreto, Mexico

ML2.6 2007/02/27 19:44:41 39.394 -123.321 6.7 3 km ( 2 mi) ESE of Willits, CA
ML1.5 2007/02/27 18:36:47 38.820 -122.871 2.8 6 km ( 4 mi) WNW 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


ML1.7 2007/02/27 23:42:10 33.370 -116.362 12.3 14 km ( 9 mi) N of Borrego Springs, CA
ML1.9 2007/02/27 23:13:08 39.923 -122.935 0.0 30 km ( 19 mi) ENE of Covelo, CA
ML2.5 2007/02/27 22:50:26 39.472 -123.108 4.1 15 km ( 9 mi) WNW of Lake Pillsbury, CA
ML1.5 2007/02/27 21:56:50 35.471 -118.252 6.7 20 km ( 13 mi) SSE of Weldon, CA


February 28, 2007

24 Hour Peak Crustal Resonant Frequency =

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


ML2.1 2007/02/28 02:29:13 35.022 -119.096 11.7 12 km ( 8 mi) WSW of Mettler, CA
ML1.5 2007/02/28 00:36:15 35.946 -117.713 4.4 24 km ( 15 mi) ESE of Coso Junction, CA
ML1.5 2007/02/28 00:31:57 35.944 -117.711 5.4 24 km ( 15 mi) ESE of Coso Junction, 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


ML1.7 2007/02/28 05:47:48 39.232 -120.102 6.9 5 km ( 3 mi) WSW of Tahoe Vista, CA
ML1.7 2007/02/28 05:03:21 36.670 -121.295 3.9 13 km ( 8 mi) S of Tres Pinos, CA
ML1.1 2007/02/28 03:45:26 35.813 -121.343 2.0 23 km (15 mi) NW of San Simeon, 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


ML1.6 2007/02/28 07:20:43 32.708 -116.054 10.9 6 km ( 4 mi) WSW of Ocotillo, CA
ML2.3 2007/02/28 06:23:07 35.024 -116.963 2.6 18 km ( 11 mi) NNE of Barstow, 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 2007/02/28 11:59:44 38.796 -122.813 2.5 1 km ( 0 mi) WSW of The Geysers, CA
ML1.4 2007/02/28 11:54:25 35.075 -118.436 6.2 6 km ( 4 mi) SSE of Tehachapi, CA

ML3.5 2007/02/28 11:47:41 41.064 -114.777 5.0 17 km ( 10 mi) ESE of Wells, NV

ML1.8 2007/02/28 11:29:01 38.811 -122.791 2.1 2 km ( 1 mi) NE of The Geysers, CA
ML1.4 2007/02/28 11:28:31 33.081 -116.600 13.0 2 km ( 1 mi) NW of Julian, CA
ML2.2 2007/02/28 11:20:51 33.159 -115.954 24.9 16 km ( 10 mi) S of Salton City, CA
ML1.8 2007/02/28 10:58:26 38.809 -122.793 1.5 2 km ( 1 mi) NE of The Geysers, CA

ML3.3 2007/02/28 10:47:39 38.806 -122.788 2.0 2 km ( 1 mi) ENE of The Geysers, CA

M5.1 2007/02/28 09:29:46 2.443 124.319 280.9 CELEBES SEA


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


ML2.9 2007/02/28 14:46:09 41.110 -114.806 5.0 14 km ( 8 mi) E of Wells, NV
ML1.3 2007/02/28 14:13:49 36.640 -121.253 6.2 16 km ( 10 mi) NW of Pinnacles, CA
ML1.9 2007/02/28 13:32:08 38.820 -122.825 2.7 3 km ( 2 mi) NNW of The Geysers, CA
ML1.4 2007/02/28 13:11:04 37.248 -115.517 0.0 34 km ( 21 mi) WSW of Alamo, NV
ML1.1 2007/02/28 12:08:00 37.631 -118.862 5.1 10 km ( 6 mi) E of Mammoth Lakes, 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


M4.8 2007/02/28 17:02:30 5.542 126.724 71.2 MINDANAO, PHILIPPINES

ML1.3 2007/02/28 16:35:29 36.737 -121.091 0.5 21 km ( 13 mi) ESE of Tres Pinos, CA
ML2.4 2007/02/28 16:07:37 36.151 -118.070 1.6 14 km ( 9 mi) SSW of Olancha, CA
ML1.1 2007/02/28 15:38:05 37.548 -118.870 7.1 14 km ( 9 mi) SE of Mammoth Lakes, CA
ML1.5 2007/02/28 15:37:44 36.152 -118.067 5.9 14 km ( 9 mi) SSW of Olancha, CA
ML1.3 2007/02/28 15:11:42 36.679 -121.307 2.7 12 km ( 8 mi) S of Tres Pinos, CA
ML1.2 2007/02/28 15:09:28 36.092 -117.606 3.6 20 km ( 12 mi) S of Darwin, 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


M4.8 2007/02/28 19:55:34 38.189 39.194 10.0 EASTERN TURKEY
M5.0 2007/02/28 19:37:17 61.002 167.124 10.0 KORYAKIA, RUSSIA

ML1.1 2007/02/28 18:18:53 35.754 -120.373 4.4 11 km ( 7 mi) N of Shandon, 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


ML4.2 2007/02/28 23:56:30 51.178 -178.022 10.0 ANDREANOF ISLANDS, ALEUTIAN IS., ALASKA

ML1.4 2007/02/28 23:24:13 33.465 -116.461 17.1 22 km ( 14 mi) ESE of Anza, CA
ML1.2 2007/02/28 23:20:51 33.472 -116.486 17.2 20 km ( 12 mi) ESE of Anza, CA

M6.2 2007/02/28 23:13:20 -55.174 -29.184 35.0 SOUTH SANDWICH ISLANDS REGION

ML1.2 2007/02/28 22:01:50 33.467 -116.472 9.7 21 km ( 13 mi) ESE of Anza, CA
ML1.8 2007/02/28 21:28:06 33.487 -116.441 5.7 23 km ( 14 mi) ESE of Anza, CA
ML1.3 2007/02/28 21:22:37 33.486 -116.402 15.7 23 km ( 14 mi) SSW of La Quinta, CA



Frank Condon

Independent Earthquake Precursor Research Consultant

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