SCSN Earthquake Commentary

November 27, 2002

Commentary

Filed under: Old Commentary — kate @ 1:03 pm

The High Desert experienced a M3.4 Landers aftershock late this morning, at 10:48 am. The epicenter was 18 miles north of Yucca Valley. The quake was felt in the Johnson Valley area & as far away as Twentynine Palms. The Landers aftershocks have certainly declined in number in the ten-plus years since the Mw7.3 mainshock, but the aftershock zone can still be distinquished on seismicity maps. By definition, the aftershock sequence isn’t over until the seismicity rate has returned to normal.

Commentary

Filed under: Weekly — kate @ 12:00 am

Southern California Earthquakes in the Past Week

Kate Hutton ,

Seismological Laboratory

Lucy Jones,

U. S. Geological Survey

California Institute of Technology

November 28, 2002

The time period covered is 4 pm on Thursday, November 21 (PDT)

through 4 pm on Wednesday, November 27 (PDT). During this period

we dectected and analysed 152 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. Local Date Local Time Lat.      Long.    Depth  Descriptive location

        -------------------------------------------------------------------------------------------

13911960  2.4  2002/11/21 16:59:57 34 18.3 N 116 53.1 W  6.5    5 km ( 3 mi) NNW  of Big Bear City, CA
13911976  2.2  2002/11/21 19:23:57 33 28.5 N 116 32.8 W 13.8   15 km ( 9 mi) SE   of Anza, CA
13911980  2.3  2002/11/21 19:24:22 33 28.4 N 116 32.1 W 13.6   16 km (10 mi) SE   of Anza, CA
13911996  2.4  2002/11/22 00:29:04 32 25.3 N 115 12.4 W  7.0   38 km (24 mi) SE   of Calexico, CA
13912008  2.9  2002/11/22 01:46:54 34 48.2 N 116 17.0 W  7.4   55 km (34 mi) SSW  of Baker, CA
13912024  2.6  2002/11/22 04:16:14 33 52.7 N 117 51.7 W  8.8    5 km ( 3 mi) WSW  of Yorba Linda, CA
               FELT in Orange County
13912092  2.3  2002/11/22 14:02:27 34 40.0 N 116 20.3 W  5.6   59 km (37 mi) N    of Joshua Tree, CA
13912112  1.9  2002/11/22 19:06:16 35 26.6 N 118 34.9 W  5.6   24 km (15 mi) SSW  of town of Lake Isabella, CA
13912288  2.3  2002/11/23 17:46:55 32  4.2 N 115 48.9 W  7.0   73 km (45 mi) SSW  of Calexico, CA
13912292  2.4  2002/11/23 17:51:29 34 48.3 N 116 16.2 W  3.4   54 km (34 mi) SSW  of Baker, CA
13912296  2.0  2002/11/23 18:33:21 33  4.4 N 115 34.5 W 11.9    6 km ( 4 mi) NE   of Westmorland, CA
13912360  2.2  2002/11/24 06:08:21 36  0.3 N 117 42.7 W  1.7   22 km (13 mi) ESE  of Coso Junction, CA
13912392  2.8  2002/11/24 09:24:27 34 48.4 N 116 16.1 W  5.6   54 km (34 mi) SSW  of Baker, CA
13912428  2.1  2002/11/24 13:27:57 33 50.9 N 116 53.1 W 17.4    9 km ( 5 mi) S    of Banning, CA
13912448  2.2  2002/11/24 15:51:07 32 18.8 N 115  8.9 W  7.0   51 km (32 mi) SE   of Calexico, CA
13912460  2.1  2002/11/24 17:50:07 34 48.4 N 116 16.2 W  3.8   54 km (34 mi) SSW  of Baker, CA
13912480  2.0  2002/11/24 22:09:59 35 18.9 N 118 39.6 W  2.7   19 km (12 mi) NE   of Arvin, CA
13912496  2.1  2002/11/24 23:20:17 35 55.6 N 117 42.7 W  4.5   25 km (16 mi) ESE  of Coso Junction, CA
13912844  2.0  2002/11/25 22:40:02 33 11.8 N 116  3.4 W  5.6    9 km ( 6 mi) NE   of Ocotillo Wells, CA
13912872  2.1  2002/11/26 03:53:52 35  9.6 N 117  6.7 W  9.5   30 km (18 mi) SW   of Goldstone Lake, CA
13912892  4.1  2002/11/26 05:45:51 32  6.0 N 115  0.4 W  7.0   76 km (47 mi) SSW  of Yuma, AZ
13912896  2.2  2002/11/26 05:53:31 32  9.0 N 115  6.8 W  7.0   68 km (42 mi) SSE  of Calexico, CA
13912928  2.1  2002/11/26 08:08:07 32 20.3 N 115 13.4 W  7.0   45 km (28 mi) SE   of Calexico, CA
13913044  1.9  2002/11/26 13:01:30 33 49.6 N 116 44.4 W 17.4    9 km ( 6 mi) NNW  of Idyllwild, CA
13913112  2.1  2002/11/26 21:42:08 34 22.5 N 116 27.6 W  4.8   29 km (18 mi) N    of Yucca Valley, CA
13913140  2.1  2002/11/27 01:19:08 35 55.4 N 117 42.7 W  5.0   25 km (16 mi) ESE  of Coso Junction, CA
13913212  3.4  2002/11/27 10:48:00 34 23.0 N 116 27.9 W  3.1   30 km (18 mi) N    of Yucca Valley, CA
               FELT in Johson Valley area, Twentynine Palms
13913264  2.0  2002/11/27 12:53:31 32  7.3 N 116 24.0 W  7.0   77 km (48 mi) SE   of San Ysidro, CA
        -------------------------------------------------------------------------------------------

November 26, 2002

Commentary

Filed under: Old Commentary — kate @ 8:20 am

At 5:45 am this morning, there was a M4.1 quake in northern Baja, 47 miles south-southwest of Yuma AZ. It was preceded by about 14 seconds by a M3.5 quake at or near the same location. The larger quake might conceivably have been felt in Imperial Valley or Yuma, but we have received no reports so far.

November 22, 2002

Commentary

Filed under: Old Commentary — kate @ 7:13 am

A M2.6 quake at 4:16 am this morning was felt in Orange County. The epicenter was located 3 miles southeast of Brea. The quake was felt in Fullerton, Anaheim, Lakewood & Orange.

November 21, 2002

Commentary

Filed under: Weekly — kate @ 12:00 am

Southern California Earthquakes in the Past Week

Kate Hutton ,

Seismological Laboratory

Lucy Jones,

U. S. Geological Survey

California Institute of Technology

November 22, 2002

The time period covered is 4 pm on Thursday, November 14 (PDT)

through 4 pm on Thursday, November 21 (PDT). During this period

we dectected and analysed 146 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. Local Date Local Time Lat.      Long.    Depth  Descriptive location

        -------------------------------------------------------------------------------------------

13910480  2.0  2002/11/14 16:05:53 34 23.7 N 119 21.1 W  3.8   11 km ( 7 mi) WSW  of Ojai, CA
13910776  1.9  2002/11/16 02:07:59 36  5.4 N 117 37.8 W  3.9   29 km (18 mi) E    of Coso Junction, CA
13910800  2.9  2002/11/16 05:33:57 32 38.2 N 116  7.0 W  1.9   16 km (10 mi) SW   of Ocotillo, CA
13910984  2.2  2002/11/16 21:43:19 33  2.7 N 115 36.2 W 15.3    2 km ( 1 mi) ENE  of Westmorland, CA
13910980  2.2  2002/11/16 21:43:19 33  1.5 N 115 41.8 W 16.2    7 km ( 4 mi) W    of Westmorland, CA
13910988  2.4  2002/11/16 22:23:13 34 48.1 N 116 16.0 W  5.1   54 km (34 mi) SSW  of Baker, CA
13911004  3.0  2002/11/17 00:13:55 32 22.6 N 115 13.2 W  7.0   41 km (26 mi) SE   of Calexico, CA
13911120  2.0  2002/11/17 17:55:16 35 32.7 N 118 48.4 W  4.9   26 km (16 mi) NE   of Bakersfield, CA
13911128  2.4  2002/11/17 20:43:53 36  5.2 N 117 36.7 W  0.3   31 km (19 mi) E    of Coso Junction, CA
13911144  2.7  2002/11/18 02:19:06 33 54.7 N 119 18.1 W  7.0   24 km (15 mi) SE   of Santa Cruz Is.
13911164  2.4  2002/11/18 03:59:07 34 48.3 N 116 16.0 W  6.7   54 km (34 mi) SSW  of Baker, CA
13911208  2.1  2002/11/18 06:04:08 33 58.3 N 116 52.7 W 22.1    5 km ( 3 mi) N    of Banning, CA
13911700  2.2  2002/11/20 01:44:17 34 25.8 N 119 18.8 W  3.3    6 km ( 4 mi) WSW  of Ojai, CA
13911768  2.4  2002/11/20 09:21:07 34 20.0 N 119 27.5 W 15.4    9 km ( 6 mi) SE   of Carpinteria, CA
               FELT in Carpinteria
13911836  2.5  2002/11/20 21:17:30 33 10.9 N 115 36.0 W  2.4    4 km ( 2 mi) ENE  of Obsidian Butte, CA  

        -------------------------------------------------------------------------------------------

November 20, 2002

Commentary

Filed under: Old Commentary — kate @ 10:38 am

A small quake was felt this morning in Carpinteria. It occurred at 9:21 am, 3 miles southeast of Carpinteria (offshore) & had a magnitude of M2.4.

November 14, 2002

Commentary

Filed under: Weekly — kate @ 12:00 am

Southern California Earthquakes in the Past Week

Kate Hutton ,

Seismological Laboratory

Lucy Jones,

U. S. Geological Survey

California Institute of Technology

November 15, 2002

The time period covered is 4 pm on Thursday, November 7 (PDT)

through 4 pm on Thursday, November 14 (PDT). During this period

we dectected and analysed 181 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. Local Date Local Time Lat.      Long.    Depth  Descriptive location

        -------------------------------------------------------------------------------------------

13909088  2.8  2002/11/07 20:46:56 34 40.7 N 116 17.7 W  5.6   60 km (37 mi) N    of Joshua Tree, CA
13909096  2.6  2002/11/07 21:17:08 34 28.4 N 116 13.8 W  6.6   38 km (24 mi) NNE  of Joshua Tree, CA
13909208  2.0  2002/11/08 13:25:17 35 19.1 N 118 39.6 W  5.0   20 km (12 mi) NE   of Arvin, CA
13909220  3.5  2002/11/08 15:19:06 34 55.4 N 119  1.0 W 12.4    8 km ( 5 mi) WSW  of Grapevine, CA
               FELT in Frazier Park, Lebec area & Bakersfield.
13909232  2.3  2002/11/08 17:05:58 34 54.7 N 119  1.4 W 14.5    9 km ( 6 mi) WSW  of Grapevine, CA
13909292  2.4  2002/11/09 01:35:35 32 39.8 N 115 52.9 W  5.8   13 km ( 8 mi) SE   of Ocotillo, CA
13909296  2.4  2002/11/09 01:37:57 35 16.3 N 118 35.2 W  4.9   20 km (13 mi) NW   of Tehachapi, CA
13909344  2.7  2002/11/09 08:18:35 35 16.2 N 118 35.1 W  5.0   20 km (12 mi) NW   of Tehachapi, CA
               FELT in Tehachapi.
13909360  3.1  2002/11/09 13:06:31 35 56.9 N 117 17.7 W  5.3   21 km (13 mi) NNE  of Trona, CA
13909368  2.4  2002/11/09 14:17:28 35  9.0 N 117 10.8 W  5.8   32 km (20 mi) NNW  of Barstow, CA
13909416  2.2  2002/11/09 23:13:10 34 10.5 N 117 44.7 W  7.3    8 km ( 5 mi) NNW  of Claremont Colleges, CA
13909676  2.2  2002/11/10 01:18:28 34 48.3 N 116 16.0 W  1.9   54 km (34 mi) SSW  of Baker, CA
13909472  2.3  2002/11/10 06:05:29 34 17.4 N 118 31.3 W  7.3    3 km ( 2 mi) NW   of Granada Hills, CA
               FELT in Northridge & Granada Hills.
13909508  2.6  2002/11/10 11:47:49 33 59.7 N 117 10.9 W 14.5    7 km ( 4 mi) S    of Redlands, CA
13909552  2.0  2002/11/10 15:21:21 32 51.0 N 116  2.9 W  5.9   14 km ( 9 mi) NNW  of Ocotillo, CA
13909560  2.1  2002/11/10 15:49:18 34 31.0 N 118 33.4 W 11.0    6 km ( 4 mi) E    of Castaic Lake dam, CA
13909584  2.6  2002/11/10 16:39:15 34 47.7 N 116 15.9 W  4.2   55 km (34 mi) SSW  of Baker, CA
13909652  2.6  2002/11/11 07:02:45 34 48.6 N 116 16.0 W  6.4   54 km (33 mi) SSW  of Baker, CA
13909812  2.0  2002/11/11 18:26:01 34 22.6 N 116 28.0 W  6.1   29 km (18 mi) N    of Yucca Valley, CA
13909816  2.2  2002/11/11 18:28:26 33 57.9 N 118 24.5 W 15.5    3 km ( 2 mi) NE   of Los Angeles Airport, CA
13909856  2.3  2002/11/12 01:25:27 32 19.4 N 115 15.6 W  7.0   44 km (28 mi) SSE  of Calexico, CA
13909920  4.2  2002/11/12 08:48:25 35 58.4 N 120 31.3 W  8.4   11 km ( 7 mi) NW  of Parkfield, CA
               See Menlo Park pages for more info. Felt in Parkfield to San Luis Obisbo areas.
13909932  2.0  2002/11/12 10:05:00 32  3.0 N 116 19.5 W  7.0   82 km (51 mi) SSW  of Ocotillo, CA
13910104  2.4  2002/11/12 20:59:15 34 35.1 N 116 15.7 W  6.2   50 km (31 mi) N    of Joshua Tree, CA
13910136  1.9  2002/11/13 03:56:16 34 24.4 N 119 18.6 W  8.0    7 km ( 4 mi) SW   of Ojai, CA
13910260  2.0  2002/11/13 15:27:41 35 19.1 N 118 39.2 W  1.3   20 km (13 mi) NE   of Arvin, CA
13910296  2.0  2002/11/13 17:31:46 34 51.7 N 116 23.8 W  5.7   54 km (33 mi) SSW  of Baker, CA
13910304  2.2  2002/11/13 17:46:57 32 21.0 N 115 42.0 W  5.6   40 km (25 mi) SSW  of Calexico, CA
13910372  2.7  2002/11/14 05:01:46 35 18.8 N 118 38.6 W  2.9   21 km (13 mi) NE   of Arvin, CA
13910436  2.6  2002/11/14 10:26:23 34 26.1 N 116 15.0 W  4.0   34 km (21 mi) N    of Joshua Tree, CA
        -------------------------------------------------------------------------------------------

Commentary

Filed under: Weekly — kate @ 12:00 am

Southern California Earthquakes in the Past Week

Kate Hutton ,

Seismological Laboratory

Lucy Jones,

U. S. Geological Survey

California Institute of Technology

November 15, 2002

The time period covered is 4 pm on Thursday, November 7 (PDT)

through 4 pm on Thursday, November 14 (PDT). During this period

we dectected and analysed 181 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. Local Date Local Time Lat.      Long.    Depth  Descriptive location

        -------------------------------------------------------------------------------------------

13909088  2.8  2002/11/07 20:46:56 34 40.7 N 116 17.7 W  5.6   60 km (37 mi) N    of Joshua Tree, CA
13909096  2.6  2002/11/07 21:17:08 34 28.4 N 116 13.8 W  6.6   38 km (24 mi) NNE  of Joshua Tree, CA
13909208  2.0  2002/11/08 13:25:17 35 19.1 N 118 39.6 W  5.0   20 km (12 mi) NE   of Arvin, CA
13909220  3.5  2002/11/08 15:19:06 34 55.4 N 119  1.0 W 12.4    8 km ( 5 mi) WSW  of Grapevine, CA
               FELT in Frazier Park, Lebec area & Bakersfield.
13909232  2.3  2002/11/08 17:05:58 34 54.7 N 119  1.4 W 14.5    9 km ( 6 mi) WSW  of Grapevine, CA
13909292  2.4  2002/11/09 01:35:35 32 39.8 N 115 52.9 W  5.8   13 km ( 8 mi) SE   of Ocotillo, CA
13909296  2.4  2002/11/09 01:37:57 35 16.3 N 118 35.2 W  4.9   20 km (13 mi) NW   of Tehachapi, CA
13909344  2.7  2002/11/09 08:18:35 35 16.2 N 118 35.1 W  5.0   20 km (12 mi) NW   of Tehachapi, CA
               FELT in Tehachapi.
13909360  3.1  2002/11/09 13:06:31 35 56.9 N 117 17.7 W  5.3   21 km (13 mi) NNE  of Trona, CA
13909368  2.4  2002/11/09 14:17:28 35  9.0 N 117 10.8 W  5.8   32 km (20 mi) NNW  of Barstow, CA
13909416  2.2  2002/11/09 23:13:10 34 10.5 N 117 44.7 W  7.3    8 km ( 5 mi) NNW  of Claremont Colleges, CA
13909676  2.2  2002/11/10 01:18:28 34 48.3 N 116 16.0 W  1.9   54 km (34 mi) SSW  of Baker, CA
13909472  2.3  2002/11/10 06:05:29 34 17.4 N 118 31.3 W  7.3    3 km ( 2 mi) NW   of Granada Hills, CA
               FELT in Northridge & Granada Hills.
13909508  2.6  2002/11/10 11:47:49 33 59.7 N 117 10.9 W 14.5    7 km ( 4 mi) S    of Redlands, CA
13909552  2.0  2002/11/10 15:21:21 32 51.0 N 116  2.9 W  5.9   14 km ( 9 mi) NNW  of Ocotillo, CA
13909560  2.1  2002/11/10 15:49:18 34 31.0 N 118 33.4 W 11.0    6 km ( 4 mi) E    of Castaic Lake dam, CA
13909584  2.6  2002/11/10 16:39:15 34 47.7 N 116 15.9 W  4.2   55 km (34 mi) SSW  of Baker, CA
13909652  2.6  2002/11/11 07:02:45 34 48.6 N 116 16.0 W  6.4   54 km (33 mi) SSW  of Baker, CA
13909812  2.0  2002/11/11 18:26:01 34 22.6 N 116 28.0 W  6.1   29 km (18 mi) N    of Yucca Valley, CA
13909816  2.2  2002/11/11 18:28:26 33 57.9 N 118 24.5 W 15.5    3 km ( 2 mi) NE   of Los Angeles Airport, CA
13909856  2.3  2002/11/12 01:25:27 32 19.4 N 115 15.6 W  7.0   44 km (28 mi) SSE  of Calexico, CA
13909920  4.2  2002/11/12 08:48:25 35 58.4 N 120 31.3 W  8.4   11 km ( 7 mi) NW  of Parkfield, CA
               See Menlo Park pages for more info. Felt in Parkfield to San Luis Obisbo areas.
13909932  2.0  2002/11/12 10:05:00 32  3.0 N 116 19.5 W  7.0   82 km (51 mi) SSW  of Ocotillo, CA
13910104  2.4  2002/11/12 20:59:15 34 35.1 N 116 15.7 W  6.2   50 km (31 mi) N    of Joshua Tree, CA
13910136  1.9  2002/11/13 03:56:16 34 24.4 N 119 18.6 W  8.0    7 km ( 4 mi) SW   of Ojai, CA
13910260  2.0  2002/11/13 15:27:41 35 19.1 N 118 39.2 W  1.3   20 km (13 mi) NE   of Arvin, CA
13910296  2.0  2002/11/13 17:31:46 34 51.7 N 116 23.8 W  5.7   54 km (33 mi) SSW  of Baker, CA
13910304  2.2  2002/11/13 17:46:57 32 21.0 N 115 42.0 W  5.6   40 km (25 mi) SSW  of Calexico, CA
13910372  2.7  2002/11/14 05:01:46 35 18.8 N 118 38.6 W  2.9   21 km (13 mi) NE   of Arvin, CA
13910436  2.6  2002/11/14 10:26:23 34 26.1 N 116 15.0 W  4.0   34 km (21 mi) N    of Joshua Tree, CA
        -------------------------------------------------------------------------------------------

November 12, 2002

Commentary

Filed under: Old Commentary — kate @ 8:58 am

According to the U.S.G.S. in Menlo Park and U.C. Berkeley, the quake in the Parkfield area this morning was a Mw4.2. It occurred at 8:48 am & the epicenter was located 7 miles northwest of Parkfield. It was felt in the Coalinga, Paso Robles, Atascadero & San Luis Obispo areas.

November 11, 2002

Commentary

Filed under: Old Commentary — kate @ 9:59 am

The largest quake that happened over the weekend was a M3.1 13 miles east of Trona. It occurred at 1:06 am on Saturday. This is an isolated area in the mountains between Owens Valley and Panamint Valley; there have been no “felt reports”.

Two smaller quakes were felt, however. One was a M2.7 at 8:18 am on Saturday, felt in Tehachapi. The epicenter was located 13 miles northwest of Tehachapi.

The other was a M2.3 at 6:05 am on Sunday. This epicenter was 1 mile north of Granada Hills. The quake was felt in Northridge & Granada Hills.

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