SCSN Earthquake Commentary

May 27, 2004

Commentary

Filed under: Weekly — kate @ 12:00 am



Southern California Earthquakes in the Past Week


Nick Scheckel ,

Seismological Laboratory
Lucy Jones,

U. S. Geological Survey
California Institute of Technology

May 27, 2004

The time period covered is 5 pm on Thursday, May 20 (PDT)
through 5 pm on Thursday, May 27 (PDT). During this period
we dectected and analysed 264 earthquakes. Click
here to see a map.

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
-------------------------------------------------------------------------------------------
14057380  2.1  2004/05/20 18:06:17 32 58.0 N 115 52.5 W  8.0   25 km (15 mi) WSW  of Westmorland, CA
14057472  2.1  2004/05/21 03:05:53 36  4.6 N 117 50.2 W  1.9   11 km ( 7 mi) ENE  of Coso Junction, CA
14057520  2.5  2004/05/21 06:43:07 33 20.8 N 116 21.4 W 14.9   10 km ( 6 mi) N    of Borrego Springs, CA
14057604  2.2  2004/05/21 11:56:41 36  4.6 N 117 50.3 W  2.8   11 km ( 7 mi) ENE  of Coso Junction, CA
14057648  2.2  2004/05/21 13:28:55 33  2.5 N 117 46.2 W  6.0   40 km (25 mi) WSW  of Oceanside, CA
14057768  2.6  2004/05/21 22:46:32 33 54.6 N 118  8.7 W 19.6    3 km ( 2 mi) NW   of Bellflower, CA
               Slightly felt in Lakewood, Downey & surrounding towns.
14057772  2.2  2004/05/21 22:49:58 32 54.2 N 116 15.3 W 12.2   29 km (18 mi) SSW  of Ocotillo Wells, CA
14057840  2.3  2004/05/22 08:06:37 36  4.5 N 117 50.1 W  1.8   11 km ( 7 mi) ENE  of Coso Junction, CA
14057884  2.7  2004/05/22 12:34:08 34  0.8 N 116 51.9 W  9.6   10 km ( 6 mi) N    of Banning, CA
14058092  2.4  2004/05/23 13:00:37 34 19.0 N 116 51.7 W  5.1    6 km ( 4 mi) N    of Big Bear City, CA
14058100  2.2  2004/05/23 13:11:16 34  3.7 N 117 15.5 W 13.3    2 km ( 1 mi) NNW  of Loma Linda, CA
14058172  2.0  2004/05/23 16:27:14 34  3.7 N 117 15.3 W 13.0    2 km ( 1 mi) N    of Loma Linda, CA
14058448  2.2  2004/05/24 13:51:14 32 49.8 N 116  8.0 W  7.2   17 km (10 mi) NW   of Ocotillo, CA
14058580  2.4  2004/05/24 21:23:44 34  0.0 N 118 40.2 W  9.4    4 km ( 3 mi) SSE  of Malibu, CA
10012629  2.3  2004/05/25 10:50:29 36 12.0 N 118  2.7 W  5.6   10 km ( 6 mi) SSW  of Olancha, CA
-------------------------------------------------------------------------------------------


May 24, 2004

Commentary

Filed under: Old Commentary — kate @ 6:51 am

A small quake (ML2.6) was slightly felt at 10:46 pm on Friday in Lakewood, Downey & surrounding towns. The epicenter was located about 2 miles south of Downey.

May 20, 2004

Commentary

Filed under: Weekly — kate @ 12:00 am



Southern California Earthquakes in the Past Week


Nick Scheckel ,

Seismological Laboratory
Lucy Jones,

U. S. Geological Survey
California Institute of Technology

May 20, 2004

The time period covered is 5 pm on Thursday, May 13 (PDT)
through 5 pm on Thursday, May 20 (PDT). During this period
we dectected and analysed 239 earthquakes. Click
here to see a map.

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
-------------------------------------------------------------------------------------------
10008765  2.0  2004/05/14 05:22:24 34 52.5 N 119 26.0 W 14.9   30 km (18 mi) S    of Taft, CA
10008973  2.2  2004/05/14 23:38:26 34 25.0 N 118 42.8 W 11.2   14 km ( 9 mi) W    of Valencia, CA
10009017  2.2  2004/05/15 03:27:44 35 21.4 N 118 30.1 W  5.8   26 km (16 mi) N    of Tehachapi, CA
10009225  2.4  2004/05/15 19:02:44 32 12.9 N 115 17.9 W  7.0   54 km (33 mi) SSE  of Calexico, CA
10009305  2.1  2004/05/16 01:54:31 35 33.6 N 118 21.6 W  5.6   13 km ( 8 mi) SE   of town of Lake Isabella, CA
10009429  2.2  2004/05/16 11:20:15 34 22.0 N 120  9.0 W  5.6   25 km (16 mi) S    of Solvang, CA
10009461  2.5  2004/05/16 12:18:29 33 59.2 N 118 23.4 W  9.2    2 km ( 1 mi) SSE  of Culver City, CA
               Felt in the West L.A. area, Santa Monica, Culver City and Beverly Hills.
10009865  2.1  2004/05/17 18:35:10 33 36.9 N 118 19.2 W  0.0   10 km ( 6 mi) SSW  of Pt. Fermin San Pedro, CA
10009941  2.0  2004/05/18 03:42:34 34 18.7 N 118 28.7 W  8.0    5 km ( 3 mi) NW   of San Fernando, CA
10010373  2.0  2004/05/18 19:57:58 32 35.7 N 115 17.1 W  7.0   21 km (13 mi) ESE  of Calexico, CA
10010441  2.0  2004/05/19 05:42:40 34  2.0 N 117 33.4 W 11.6    9 km ( 5 mi) SSE  of Rancho Cucamonga, CA
10010489  2.3  2004/05/19 08:25:43 36 18.8 N 117 31.5 W  5.6   42 km (26 mi) WNW  of Telescope Peak, CA
10010509  2.0  2004/05/19 09:11:21 35 26.5 N 118 42.4 W  3.2   28 km (17 mi) ENE  of Bakersfield, CA
14056756  2.2  2004/05/19 14:44:43 34  1.9 N 116 22.6 W  7.0   11 km ( 7 mi) SSE  of Yucca Valley, CA
14056856  2.2  2004/05/19 17:09:15 34  1.9 N 116 22.5 W  6.8   12 km ( 7 mi) SSE  of Yucca Valley, CA
14056904  2.0  2004/05/19 21:56:20 34  1.8 N 116 22.5 W  6.5   12 km ( 7 mi) SSE  of Yucca Valley, CA
-------------------------------------------------------------------------------------------


May 17, 2004

Commentary

Filed under: Old Commentary — kate @ 7:43 am

At 12:18 pm on Sunday, there was a ML2.5 quake felt in the Culver City area. It was located 2 miles southwest of the Baldwin Hills, in or near the complex Newport-Inglewood fault zone. This quake was initially located by our automatic software to be just offshore of Santa Monica, with a magnitude of ML2.7, illustrating that “robots” are not perfect. Seismograms contain a fair amount of “noise” in addition to the earthquake records, including disturbances due to traffic, wind blowing on structures & trees, etc. Sometimes the automatic “P-picker” (which picks the P waves & the S waves, too) has trouble telling the difference, thus throwing the location off a bit. Yesterday’s quake was felt in the West L.A. area, Santa Monica, Culver City and Beverly Hills.

May 13, 2004

Commentary

Filed under: Old Commentary — kate @ 9:09 am

Residents of the Hemet, Idyllwild and Palm Springs areas felt a ML3.1 quake last night at 11:04 pm. The epicenter was located in the complex San Jacinto fault zone 7 miles south of Idyllwild. It was followed by more than 15 tiny aftershocks, many of which are so small that they are mislocated by the automatic software. This produces a false scattering on the “Recent Earthquake Activity” maps. Check the web site again this afternoon & they should all have their correct locations.

Commentary

Filed under: Weekly — kate @ 12:00 am



Southern California Earthquakes in the Past Week


Nick Scheckel ,

Seismological Laboratory
Lucy Jones,

U. S. Geological Survey
California Institute of Technology

May 13, 2004

The time period covered is 5 pm on Thursday, May 6 (PDT)
through 5 pm on Thursday, May 13 (PDT). During this period
we dectected and analysed 243 earthquakes. Click
here to see a map.

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
-------------------------------------------------------------------------------------------
10006473  2.5  2004/05/07 10:35:22 34 42.5 N 116 20.5 W  7.6   63 km (39 mi) ENE  of Lucerne Valley, CA
10006669  2.5  2004/05/08 01:13:28 34 24.8 N 120  1.7 W  7.3   16 km (10 mi) W    of Isla Vista, CA
10006757  2.1  2004/05/08 13:52:46 32 46.3 N 115 32.6 W 15.6    3 km ( 2 mi) SSE  of El Centro, CA
10006857  4.4  2004/05/09 01:57:17 34 23.7 N 120  1.3 W  4.4   16 km (10 mi) W    of Isla Vista, CA
               Felt sharply in Isla Vista, Goleta, and Santa Barbara. It was felt as far north as
               San Luis Obisbo, and as far south as Torrance.
10006941  2.1  2004/05/09 10:56:11 32  9.0 N 116 42.1 W  7.0   55 km (34 mi) SE   of San Ysidro, CA
10007001  2.0  2004/05/09 17:29:45 32 28.0 N 115 16.9 W  7.0   30 km (19 mi) SE   of Calexico, CA
10007573  2.1  2004/05/10 11:25:17 34 10.5 N 118 14.7 W  5.0    4 km ( 2 mi) NNE  of Glendale, CA
               Felt in the Glendale, Pasadena & Burbank areas.
10007373  2.2  2004/05/10 16:26:49 33 59.5 N 116 34.0 W 12.5    6 km ( 4 mi) SSE  of Morongo Valley, CA
10007489  2.3  2004/05/11 00:43:23 34  2.1 N 117  0.9 W 14.1    2 km ( 1 mi) E    of Yucaipa, CA
10007797  3.2  2004/05/11 16:37:46 33 45.7 N 118 58.6 W  6.0   31 km (19 mi) SSW  of Pt. Dume, CA
10007801  2.2  2004/05/11 16:48:16 33 46.2 N 118 58.5 W  6.0   30 km (19 mi) SSW  of Pt. Dume, CA
10007869  2.1  2004/05/12 00:01:10 35 23.6 N 117 43.8 W  9.8   26 km (16 mi) SSW  of Ridgecrest, CA
10007897  2.1  2004/05/12 03:25:38 34 50.0 N 116 24.3 W  4.2   57 km (35 mi) SSW  of Baker, CA
10007909  2.2  2004/05/12 04:29:31 34 12.3 N 119 14.6 W 18.3    6 km ( 4 mi) W    of Oxnard, CA
10008149  2.6  2004/05/12 16:17:57 34  2.1 N 118 55.6 W 13.1    1 km ( 1 mi) SE   of Leo Carrillo State Beach, CA
10008225  2.2  2004/05/12 22:26:34 34  2.7 N 117 15.8 W 12.9    1 km ( 1 mi) WSW  of Loma Linda, CA
10008241  3.1  2004/05/12 23:04:28 33 38.8 N 116 44.1 W 16.1   11 km ( 7 mi) S    of Idyllwild, CA
               Felt in the Hemet, Idyllwild and Palm Springs areas.
10008321  2.4  2004/05/13 02:27:26 34 12.4 N 119 14.2 W 18.8    6 km ( 3 mi) WNW  of Oxnard, CA
10008517  2.0  2004/05/13 10:41:05 32 28.1 N 115 14.3 W  7.0   33 km (20 mi) SE   of Calexico, CA
10008617  2.6  2004/05/13 14:53:34 32 51.0 N 115 44.6 W 14.1   19 km (12 mi) WNW  of El Centro, CA
-------------------------------------------------------------------------------------------


May 12, 2004

Commentary

Filed under: Old Commentary — kate @ 7:21 am

There was a ML3.2 late yesterday afternoon, at 4:37 pm. The epicenter was located offshore, 22 miles south-southwest of Malibu. The ML3.2 was followed 11 minutes later by a ML2.2 aftershock.

May 10, 2004

Commentary

Filed under: Old Commentary — kate @ 1:01 pm

A small earthquake (M2.1) was felt this morning in the Pasadena, Glendale & Burbank areas. The time was 11:25 am & the epicenter was located 1 miles north-northeast of Glendale.

May 9, 2004

Commentary

Filed under: Old Commentary — kate @ 2:19 am

At 1:57am, there was a M4.4 earthquake just offshore, 10 miles WSW of Isla Vista. This quake was felt sharply in the epicentral area of Isla Vista, Goleta, and Santa Barbara. It was felt as far north as San Luis Obisbo, and as far south as Torrance. The maximum intensity reported was Modified Mercalli IV. Click here to view the ShakeMap for this event.

May 6, 2004

Commentary

Filed under: Weekly — kate @ 12:00 am



Southern California Earthquakes in the Past Week


Nick Scheckel ,

Seismological Laboratory
Lucy Jones,

U. S. Geological Survey
California Institute of Technology

May 6,, 2004

The time period covered is 5 pm on Thursday, April 29 (PDT)
through 5 pm on Thursday, May 6 (PDT). During this period
we dectected and analysed 244 earthquakes. Click
here to see a map.

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
-------------------------------------------------------------------------------------------
10004553  2.2  2004/04/30 03:13:46 32 16.4 N 115 18.4 W  7.0   47 km (29 mi) SSE  of Calexico, CA
10004657  3.3  2004/04/30 11:17:17 33 58.4 N 118 40.5 W 12.4    7 km ( 4 mi) S    of Malibu, CA
10004945  2.2  2004/05/01 08:43:00 33 20.9 N 118 47.3 W 12.2   29 km (18 mi) ESE  of Santa Barbara Is., CA
10005277  2.2  2004/05/02 12:23:16 34 23.4 N 118 36.8 W 12.1    5 km ( 3 mi) W    of Valencia, CA
10005417  2.0  2004/05/03 03:11:44 33 59.7 N 116 47.1 W 13.7    8 km ( 5 mi) N    of Cabazon, CA
10005425  2.4  2004/05/03 03:24:48 33 58.6 N 118 40.6 W 12.1    6 km ( 4 mi) S    of Malibu, CA
10005521  2.2  2004/05/03 13:48:01 33 27.6 N 116 37.5 W  6.6   11 km ( 7 mi) SSE  of Anza, CA
10005813  2.8  2004/05/04 18:20:23 32  2.9 N 115 52.0 W  7.0   77 km (48 mi) SSW  of Calexico, CA
10005837  2.4  2004/05/04 20:41:38 33 47.9 N 118 25.1 W 15.8    3 km ( 2 mi) NNE  of Palos Verdes Point, CA
10005857  2.7  2004/05/05 01:25:39 32  2.2 N 115 34.1 W 19.8   71 km (44 mi) S    of Calexico, CA
10005901  2.2  2004/05/05 04:30:53 34 25.0 N 116 28.8 W  4.2   33 km (21 mi) N    of Yucca Valley, CA
10005969  2.3  2004/05/05 09:32:21 34 12.5 N 117 34.6 W  6.7   11 km ( 7 mi) SE   of Mt. Baldy, CA
10005973  2.4  2004/05/05 09:34:57 34 12.5 N 117 34.7 W  6.6   11 km ( 7 mi) SE   of Mt. Baldy, CA
10006129  2.4  2004/05/05 18:14:45 32 19.2 N 115 12.6 W  7.0   47 km (29 mi) SE   of Calexico, CA
10006133  2.0  2004/05/05 19:00:13 33 59.4 N 117 10.1 W 12.2    7 km ( 5 mi) S    of Redlands, CA
10006241  2.4  2004/05/06 09:55:01 35 59.4 N 118 19.7 W  6.0   35 km (22 mi) W    of Coso Junction, CA
-------------------------------------------------------------------------------------------


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