SCSN Earthquake Commentary

March 30, 2006

Weekly Report – Thursday, March 30, 2006

Filed under: Weekly — Anthony Guarino @ 5:12 pm


Southern California Earthquakes in the Past Week



Anthony Guarino
 Seismological Laboratory

Lucy Jones U. S. Geological Survey

California Institute of Technology

March 30, 2006

This report covers the seven day period ending 16:00 on March 30, 2006. During this period we detected and analyzed 258 earthquakes.
The table below lists the quakes during the past week that were M2.0 or larger in the central part of the coverage area. Times are local times; if you want Greenwich Mean Time, add 7 hrs to the Pacific Daylight Time or 8 hrs to the Pacific Standard Time listed.

          Mag. PST Date   PST Time  Lat.       Long.    Depth  Descriptive location
-------------------------------------------------------------------------------------------

14218500  2.9  2006/03/23 20:57:12 32 20.4 N 115 14.4 W  6.0   44 km (27 mi) SSE  of Calexico, CA
14218504  3.6  2006/03/23 21:54:13 33 47.2 N 116 10.7 W  9.5    9 km ( 5 mi) NNE  of Indio, CA
Felt in Indio, Cabazon, and surrounding area
14218580  2.3  2006/03/23 23:47:28 32 15.1 N 115  1.0 W  6.0   62 km (38 mi) SW   of Yuma, AZ
14218596  2.0  2006/03/24 01:50:25 33 41.7 N 116 44.1 W 18.4    6 km ( 4 mi) SSW  of Idyllwild, CA
14218808  2.0  2006/03/25 03:26:29 33 46.1 N 116  5.3 W  5.6   13 km ( 8 mi) ENE  of Indio, CA
14218844  2.4  2006/03/25 07:09:34 33  2.3 N 117 44.5 W  6.0   38 km (24 mi) WSW  of Oceanside, CA
14218880  2.4  2006/03/25 12:56:05 34 59.3 N 116 56.3 W  4.9   14 km ( 8 mi) NE   of Barstow, CA
14219116  2.1  2006/03/26 23:51:00 33  9.9 N 115 38.0 W  4.1    1 km ( 0 mi) SSE  of Obsidian Butte, CA
14219200  2.2  2006/03/27 15:28:33 32 27.5 N 115 12.2 W  6.0   36 km (22 mi) SE   of Calexico, CA
14219236  2.1  2006/03/27 19:43:41 36 20.4 N 118  3.6 W  5.6    8 km ( 5 mi) NW   of Olancha, CA
14219308  2.1  2006/03/28 09:05:42 32 30.9 N 115 34.8 W  5.7   19 km (12 mi) SSW  of Calexico, CA
12244795  2.7  2006/03/28 09:06:06 32 27.2 N 115 35.2 W 11.4   25 km (16 mi) SSW  of Calexico, CA
14219320  2.4  2006/03/28 09:20:07 32 37.5 N 115 46.9 W  7.9   23 km (14 mi) ESE  of Ocotillo, CA
14219360  4.0  2006/03/28 17:36:23 35 37.3 N 117 35.3 W  8.8    7 km ( 4 mi) E    of Ridgecrest, CA
Felt in Ridgecrest, Coso Junction, southern Owens Valley, Lake Isabella, Kern, and portions of the Mojave Desert
To view the ShakeMap for this event, click here. If you felt this quake, and would like to report it,
click here.
14219376  2.3  2006/03/28 18:11:07 32 44.7 N 115 30.1 W 17.2    7 km ( 4 mi) SE   of El Centro, CA
14219420  2.3  2006/03/29 01:46:03 33 47.6 N 116 10.6 W  8.2    9 km ( 6 mi) NNE  of Indio, CA
14219436  2.6  2006/03/29 05:24:25 33 10.0 N 116  2.3 W 12.1    9 km ( 6 mi) ENE  of Ocotillo Wells, CA
14219552  2.5  2006/03/29 21:38:01 34 42.2 N 120 16.4 W  7.6   12 km ( 8 mi) NW   of Buellton, CA
14219560  2.3  2006/03/29 22:20:34 33 10.1 N 115 39.2 W  4.8    2 km ( 1 mi) W    of Obsidian Butte, CA

March 28, 2006

M4.1 Earthquake – 4 Miles East of Ridgecrest, CA

Filed under: Felt Earthquakes, Large Events, Significant Events — Anthony Guarino @ 7:08 pm

There was a M4.1 earthquake at 5:36PM this evening, located four miles east of Ridgecrest, CA. The quake was felt locally near Ridgecrest, and as far away as Olancha to the north, Lake Isabella to the west, Trona to the east, and Johannesburg to the south. If you felt this quake, and would like to report it, click here. There has been one aftershock as of 6PM, a M1.8, located very near the mainshock.
To view the ShakeMap for this event, click here.
To view the moment tensor solution for this event, click here.

March 24, 2006

Three M3+ quakes

Filed under: Felt Earthquakes — kate @ 8:04 am

In addition to the previously mentioned ML3.1 quake in the Hector Mines aftershock zone, we also recorded two others overnight. The first was a ML3.0 in Mexico about 31 miles south-southeast of Calexico. The time was 8:57 pm. We have no felt reports.

The other was a ML3.6 quake, 6 miles northeast of Indio (about 3 miles from the San Andreas fault), at 9:54 pm. This quake was felt throughout the Coachella Valley.

March 23, 2006

M3.0 Earthquake,

Filed under: Significant Events — Anthony Guarino @ 10:21 pm

There was a M3.0 earthquake at 8:57PM tonight, located 31 miles SSE of Calexico, just over the border in Mexico. This was in a remote area, and therefore was probably not felt.

Weekly Report – March 23, 2006

Filed under: Weekly — Anthony Guarino @ 5:51 pm


Southern California Earthquakes in the Past Week



Anthony Guarino
 Seismological Laboratory

Lucy Jones U. S. Geological Survey

California Institute of Technology

March 23, 2006

This report covers the seven day period ending 16:00 on March 23, 2006. During this period we detected and analyzed 175 earthquakes.
The table below lists the quakes during the past week that were M2.0 or larger in the central part of the coverage area. Times are local times; if you want Greenwich Mean Time, add 7 hrs to the Pacific Daylight Time or 8 hrs to the Pacific Standard Time listed.

          Mag. PST Date   PST Time  Lat.       Long.    Depth  Descriptive location
-------------------------------------------------------------------------------------------

14217528  2.1  2006/03/17 14:03:57 34 37.3 N 116 34.8 W  8.5   39 km (24 mi) ENE  of Lucerne Valley, CA
14217540  2.7  2006/03/17 15:05:53 33 58.5 N 118 42.4 W 13.5    7 km ( 4 mi) SSW  of Malibu, CA
Felt in Malibu, Venice, Santa Monica, and the Westside
14217560  2.3  2006/03/17 18:56:12 32 16.9 N 115 20.0 W  6.0   46 km (28 mi) SSE  of Calexico, CA
14217596  2.2  2006/03/18 06:12:24 32 25.4 N 115  7.0 W  6.0   45 km (28 mi) SE   of Calexico, CA
14217656  2.4  2006/03/18 14:55:39 33 23.3 N 118  4.8 W  6.0   23 km (14 mi) ENE  of Avalon Catalina Island, CA
14217808  2.1  2006/03/19 15:49:54 32 11.2 N 115 51.2 W  6.0   62 km (39 mi) SSE  of Ocotillo, CA
14217848  2.6  2006/03/19 23:32:40 32 52.7 N 117 27.9 W 16.5   20 km (12 mi) W    of La Jolla, CA
14217852  2.4  2006/03/19 23:35:08 33 22.7 N 116 20.3 W  5.5   14 km ( 9 mi) NNE  of Borrego Springs, CA
14217868  2.0  2006/03/20 03:31:20 33 53.0 N 116 13.4 W 10.8   19 km (12 mi) N    of Indio, CA
14217880  2.3  2006/03/20 08:06:49 33 47.3 N 119 33.4 W 24.6   27 km (17 mi) S    of Santa Cruz Is.
14217884  3.6  2006/03/20 09:16:19 32 52.4 N 116 13.3 W 12.4   26 km (16 mi) NW   of Ocotillo, CA
Felt in Ocotillo Wells and surrounding area
14217904  3.3  2006/03/20 10:47:22 35 34.2 N 117 31.7 W  9.5   14 km ( 9 mi) ESE  of Ridgecrest, CA
14217920  2.2  2006/03/20 12:49:57 33 58.0 N 117 14.4 W 12.1    9 km ( 6 mi) S    of Loma Linda, CA
14218164  2.1  2006/03/21 22:45:00 34 19.8 N 116 49.9 W  4.6    8 km ( 5 mi) NNE  of Big Bear City, CA
14218312  2.1  2006/03/22 23:09:59 32  4.8 N 115 49.9 W  6.0   73 km (45 mi) SSW  of Calexico, CA
14218340  2.2  2006/03/23 06:34:43 33 56.5 N 117 50.0 W 17.0    6 km ( 4 mi) NNW  of Yorba Linda, CA
14218424  3.1  2006/03/23 15:48:57 34 34.8 N 116 15.7 W  2.8   50 km (31 mi) N    of Joshua Tree, CA

M3.0 Earthquake, 11 Miles SSW of Ludlow, CA

Filed under: Significant Events — Anthony Guarino @ 5:08 pm

There was a M3.0 quake at 3:48PM (PST) today, located 11 miles SSW of Ludlow, CA. This is a remote desert location, nearly 30 miles north of Joshua Tree National Park, so we may not receive any felt reports for this event. If you felt this quake, and would like to report it, click here to fill out a form.

March 16, 2006

Weekly Report – March 16, 2006

Filed under: Weekly — Anthony Guarino @ 5:06 pm



Southern California Earthquakes in the Past Week


Anthony Guarino
Seismological Laboratory

Lucy Jones U. S. Geological Survey

California Institute of Technology

March 16, 2006

This report covers the seven day period ending 16:00 on March 16, 2006. During this period we detected and analyzed 198 earthquakes.
The table below lists the quakes during the past week that were M2.0 or larger in the central part of the coverage area. Times are local times; if you want Greenwich Mean Time, add 7 hrs to the Pacific Daylight Time or 8 hrs to the Pacific Standard Time listed.

          Mag. PST Date   PST Time  Lat.       Long.    Depth  Descriptive location
-------------------------------------------------------------------------------------------

14216404  2.4  2006/03/09 23:19:37 33 22.8 N 116 20.2 W  7.4   14 km ( 9 mi) NNE  of Borrego Springs, CA
14216468  2.0  2006/03/10 07:26:34 33  2.8 N 116 23.4 W 15.3   20 km (12 mi) E    of Julian, CA
14216472  2.7  2006/03/10 08:58:33 32 58.5 N 115 54.0 W  5.0   27 km (17 mi) WSW  of Westmorland, CA
14216484  2.0  2006/03/10 11:53:42 32 53.1 N 115 30.1 W 10.0    9 km ( 6 mi) SSE  of Brawley, CA
14216528  2.8  2006/03/10 19:18:22 34 37.6 N 116 39.4 W  6.0   33 km (21 mi) NE   of Lucerne Valley, CA
14216544  3.5  2006/03/10 23:45:03 34 17.4 N 116 49.7 W  5.2    4 km ( 2 mi) NE   of Big Bear City, CA
Felt in Big Bear City, Big Bear Lake, Running Springs, Arrowhead, Arrowbear, San Bernardino, Riverside, and Orange Counties.
If you felt this quake, and would like to report it, or to view the map of felt locations, click here.
14216660  2.1  2006/03/11 14:41:20 33 42.2 N 116 45.1 W 20.7    6 km ( 4 mi) SW   of Idyllwild, CA
14216708  2.1  2006/03/11 21:36:42 34  0.7 N 117 34.5 W  4.7    9 km ( 6 mi) SE   of Ontario, CA
14216716  3.1  2006/03/11 22:26:42 32 50.7 N 118 15.6 W  8.8    9 km ( 5 mi) ENE  of San Clemente Is.
14216724  2.8  2006/03/11 22:43:56 32 48.3 N 118 19.5 W  6.0    3 km ( 2 mi) SE   of San Clemente Is.
14216752  2.1  2006/03/12 04:11:26 33 29.8 N 116 26.5 W  8.5   22 km (14 mi) ESE  of Anza, CA
14216760  2.6  2006/03/12 05:10:01 33 25.0 N 118  6.0 W  3.0   22 km (14 mi) ENE  of Avalon Catalina Island, CA
14216776  2.1  2006/03/12 07:10:00 33 47.9 N 116 10.7 W  8.9   10 km ( 6 mi) NNE  of Indio, CA
14216808  2.6  2006/03/12 17:40:40 33 49.6 N 119 24.1 W  6.0   25 km (16 mi) SSE  of Santa Cruz Is.
14216848  3.1  2006/03/13 01:52:53 33 48.2 N 119 23.9 W 10.3   28 km (17 mi) SSE  of Santa Cruz Is.
14216876  2.1  2006/03/13 10:43:12 33 42.5 N 118 16.8 W  4.8    2 km ( 1 mi) ENE  of Pt. Fermin San Pedro, CA
14216932  3.2  2006/03/13 17:41:46 33 49.0 N 119 24.1 W  6.0   26 km (16 mi) SSE  of Santa Cruz Is.
14216992  3.0  2006/03/14 06:50:57 35 56.0 N 117 38.4 W  3.0   30 km (19 mi) ESE  of Coso Junction, CA
14217000  2.5  2006/03/14 07:35:15 32 19.1 N 115 12.0 W  6.0   48 km (30 mi) SE   of Calexico, CA
14217024  2.0  2006/03/14 10:16:25 33  2.3 N 116 25.2 W  5.5   17 km (11 mi) ESE  of Julian, CA
14217028  2.1  2006/03/14 10:46:57 33 57.2 N 119 16.5 W  5.5   22 km (14 mi) SSW  of Port Hueneme, CA
14217032  2.1  2006/03/14 11:29:42 32 47.3 N 116  2.7 W 11.0    8 km ( 5 mi) NW   of Ocotillo, CA
14217236  2.7  2006/03/15 16:51:46 33 57.8 N 117 55.9 W 20.2    4 km ( 3 mi) NNE  of La Habra, CA
Felt in La Habra, Fullerton, Brea, and surrounding areas.
If you felt this quake, and would like to report it, click here.
14217300  2.6  2006/03/16 04:22:56 33 38.1 N 118 31.4 W  1.9   18 km (11 mi) SSW  of Palos Verdes Point, CA
Possibly felt in Palos Verdes, San Pedro, and Rancho PV.
If you felt this quake, and would like to report it, click here.
14217312  2.3  2006/03/16 08:07:02 35 13.3 N 116 29.9 W  2.2   38 km (24 mi) ESE  of Goldstone Lake, CA

%

March 14, 2006

Offshore earthquakes

Filed under: Felt Earthquakes — kate @ 7:22 am

It has been somewhat of a week for offshore earthquakes. The latest activity is a small cluster of quakes about 15 miles south-southeast of the east end of Santa Cruz Island (one of the Channel Islands). The largest ones were both yesterday: a ML3.1 at 1:52 am & a ML3.2 at 5:41 pm.

Earlier, we saw a ML3.1 & a ML2.8 southeast of San Clemente Island (or about 65 miles west of San Diego). These quake occurred at 10:26 pm & 10:43 pm on Saturday.

A little closer to home, there was a ML2.6 at 5:10 am Sunday, located 18 miles southwest of Newport Beach.

None of these quakes are noteworthy of themselves & none was strong enough to be felt on the mainland. It’s a map that we do not see every day, however.

March 11, 2006

3.5 in Big Bear area

Filed under: Felt Earthquakes — kate @ 1:06 am

An earthquake with magnitude 3.5 occurred late this evening, located 2 miles north-northeast of Big Bear City. The time was 11:45 pm on Friday. The earthquake has been reported felt in the epicentral area, as well as San Bernardino & Riverside.

March 9, 2006

Weekly Report – March 9, 2006

Filed under: Weekly — Anthony Guarino @ 5:21 pm


Southern California Earthquakes in the Past Week


Anthony Guarino
 Seismological Laboratory

Lucy Jones U. S. Geological Survey

California Institute of Technology

March 9, 2006

This report covers the seven day period ending 16:00 on March 09, 2006. During this period we detected and analyzed 209 earthquakes.
The table below lists the quakes during the past week that were M2.0 or larger in the central part of the coverage area. Times are local times; if you want Greenwich Mean Time, add 7 hrs to the Pacific Daylight Time or 8 hrs to the Pacific Standard Time listed.

          Mag. PST Date   PST Time  Lat.       Long.    Depth  Descriptive location
-------------------------------------------------------------------------------------------

14215264  2.0  2006/03/02 17:43:44 33 20.9 N 116 21.3 W 13.2   11 km ( 7 mi) N    of Borrego Springs, CA
14215276  2.1  2006/03/02 21:52:14 33 31.7 N 116 41.1 W 13.2    3 km ( 2 mi) SSW  of Anza, CA
14215316  3.7  2006/03/03 05:44:05 35  7.3 N 117 33.4 W  2.1   16 km (10 mi) NNE  of Boron, CA
Felt in Boron and surrounding area. If you felt this quake, and would like to report it, click here.
14215420  3.1  2006/03/03 19:16:42 32 14.6 N 115  1.4 W  6.0   63 km (39 mi) SW   of Yuma, AZ
14215424  2.7  2006/03/03 19:28:41 32 12.5 N 115  0.7 W  6.0   66 km (41 mi) SSW  of Yuma, AZ
14215432  2.8  2006/03/03 19:50:44 32 21.1 N 115  5.1 W  6.0   52 km (32 mi) SE   of Calexico, CA
14215452  2.3  2006/03/03 23:26:12 32 18.4 N 115  3.1 W  6.0   58 km (36 mi) SE   of Calexico, CA
14215476  2.8  2006/03/04 03:24:37 35  7.0 N 117 33.2 W  0.8   16 km (10 mi) NE   of Boron, CA
14215484  2.1  2006/03/04 05:38:57 32 23.9 N 115  8.1 W  6.0   45 km (28 mi) SE   of Calexico, CA
14215524  2.1  2006/03/04 10:24:33 32 21.5 N 115  5.2 W  6.0   52 km (32 mi) SE   of Calexico, CA
14215540  2.6  2006/03/04 14:00:50 35  2.1 N 119  0.0 W  9.2    6 km ( 4 mi) WNW  of Wheeler Ridge, CA
14215544  2.1  2006/03/04 14:18:02 33 13.9 N 116  6.5 W 10.8   10 km ( 6 mi) NNE  of Ocotillo Wells, CA
14215592  3.6  2006/03/04 23:27:40 32 20.6 N 115  4.9 W  6.0   53 km (33 mi) SE   of Calexico, CA
14215600  2.4  2006/03/04 23:46:33 32  3.9 N 114 57.8 W  6.0   77 km (48 mi) SSW  of Yuma, AZ
14215620  2.1  2006/03/05 00:38:00 32 13.5 N 115  2.7 W  6.0   65 km (40 mi) SE   of Calexico, CA
14215632  3.4  2006/03/05 02:43:13 34  1.4 N 117 33.4 W 10.7   10 km ( 6 mi) ESE  of Ontario, CA
Felt throughout the Inland Empire and Orange County, and as far away as portions of Pasadena, Lancaster,
Culver City, Victorville, and Carlsbad. If you felt this quake, and would like to report it, click here.
14215636  2.0  2006/03/05 02:44:12 34  2.6 N 117 29.7 W  9.4    9 km ( 6 mi) SW   of Fontana, CA
14215708  2.4  2006/03/05 11:24:09 32 21.1 N 115 17.4 W  6.0   40 km (25 mi) SSE  of Calexico, CA
12241023  2.6  2006/03/05 11:26:30 32 23.4 N 115 17.4 W  6.0   36 km (23 mi) SSE  of Calexico, CA
14215732  2.4  2006/03/05 12:47:46 32 37.6 N 115 46.7 W  5.7   23 km (15 mi) ESE  of Ocotillo, CA
14215752  2.7  2006/03/05 13:41:06 32 20.9 N 115  5.4 W  6.0   52 km (32 mi) SE   of Calexico, CA
14215812  3.7  2006/03/05 22:54:42 32 34.1 N 115 34.4 W 10.0   13 km ( 8 mi) SSW  of Calexico, CA
14215876  2.1  2006/03/06 11:58:57 32 15.7 N 115 21.1 W  6.0   47 km (29 mi) SSE  of Calexico, CA
14215912  2.6  2006/03/06 22:40:58 32 10.4 N 115  3.2 W  6.0   69 km (43 mi) SE   of Calexico, CA
14215920  2.4  2006/03/06 23:26:19 32 10.2 N 115  3.1 W  6.0   69 km (43 mi) SE   of Calexico, CA
14215928  3.1  2006/03/07 00:52:30 33 47.7 N 119 23.6 W  6.0   29 km (18 mi) SSE  of Santa Cruz Is.
14215948  2.1  2006/03/07 07:38:40 32 18.4 N 115  3.1 W  6.0   58 km (36 mi) SE   of Calexico, CA
14216008  2.3  2006/03/07 15:00:52 33 47.7 N 116 10.6 W  6.1   10 km ( 6 mi) NNE  of Indio, CA
14216020  3.3  2006/03/07 17:23:38 32 19.8 N 115 14.2 W 29.2   45 km (28 mi) SSE  of Calexico, CA
14216036  2.1  2006/03/07 19:02:14 33  2.6 N 117 35.4 W 15.2   26 km (16 mi) SW   of Oceanside, CA
14216044  2.5  2006/03/07 19:09:13 33 48.4 N 119 21.8 W  9.7   29 km (18 mi) SSE  of Santa Cruz Is.
14216052  2.7  2006/03/07 21:47:39 32 20.0 N 115  4.9 W 28.4   54 km (33 mi) SE   of Calexico, CA
14216060  2.1  2006/03/07 23:04:22 33 23.1 N 118  4.5 W  5.8   23 km (14 mi) ENE  of Avalon Catalina Island, CA
14216076  2.1  2006/03/08 06:02:43 32 10.1 N 115 20.4 W  6.0   57 km (36 mi) SSE  of Calexico, CA
14216080  2.9  2006/03/08 06:23:39 33 48.8 N 119 23.2 W  6.0   27 km (17 mi) SSE  of Santa Cruz Is.
14216112  2.7  2006/03/08 08:36:59 33 50.3 N 119 22.9 W  6.0   25 km (16 mi) SSE  of Santa Cruz Is.
14216116  2.1  2006/03/08 09:00:59 36  9.0 N 118  4.4 W  0.9   16 km (10 mi) SSW  of Olancha, CA
14216128  2.4  2006/03/08 11:11:35 33 22.9 N 116 20.6 W  6.0   14 km ( 9 mi) N    of Borrego Springs, CA
14216220  2.7  2006/03/08 21:48:38 35 44.5 N 118  3.2 W  4.1   35 km (22 mi) SSW  of Coso Junction, CA
14216320  2.1  2006/03/09 08:37:02 34 47.7 N 120 20.9 W 25.1   19 km (12 mi) SSE  of Santa Maria, CA
14216332  2.2  2006/03/09 11:19:53 32 29.5 N 115 36.3 W 14.8   22 km (14 mi) SSW  of Calexico, CA
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