SCSN Earthquake Commentary

May 28, 2006

Two Northern Baja Aftershocks, M4.2 and M4.4 – Sunday May 28th, 12:42AM and 4:55AM, Respectively

Filed under: Felt Earthquakes, Large Events, Significant Events — Anthony Guarino @ 1:29 am

Another pair of Baja aftershocks occurred early Sunday morning, marking three M4+ aftershocks in two days. The first of the pair that occurred this morning, a M 4.2, was located 29 miles SE of Calexico. The second, a M4.4, was located 25 miles SE of Calexico. M4+ aftershocks are not uncommon to follow the M5.4 that occurred earlier this week, located in the same area. Robust aftershock sequences have occurred here in the past, and may be in part due to the nearby Cerro Prieto Geothermal Field. These quakes were felt throughout the southern San Diego County, and was felt as far away as Orange County.

May 27, 2006

M4.2 Baja CA Earthquake – Saturday May 27 3:21AM

Filed under: Felt Earthquakes, Large Events, Significant Events — Anthony Guarino @ 3:47 am

There was a M4.2 quake at 3:21 AM this morning, located in Bahja CA, 34 miles SSE of Calexico, CA. This is an aftershock of the M5.4 quake that occurred earlier this week in the same area. This quake was felt throughout the San Diego County, and as far away as Orange County.

May 25, 2006

Weekly Report – May 25, 2006

Filed under: Weekly — Anthony Guarino @ 5:07 pm




Southern California Earthquakes in the Past Week

Anthony Guarino
Seismological Laboratory


Lucy JonesU. S. Geological Survey

California Institute of Technology

May 26, 2006

This report covers the seven day period ending 17:00 on May 25, 2006. During this period we detected and analyzed 222 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
-------------------------------------------------------------------------------------------


10183965 2.3 2006/05/19 12:19:37 32 46.8 N 115 32.2 W 17.5 2 km ( 1 mi) SE of El Centro, CA
10184093 2.0 2006/05/20 08:29:45 34 0.6 N 116 53.6 W 12.3 9 km ( 6 mi) N of Banning, CA
10184101 2.5 2006/05/20 08:38:23 36 3.7 N 117 43.0 W 2.8 21 km (13 mi) E of Coso Junction, CA
10184217 2.1 2006/05/20 23:09:05 32 28.3 N 115 15.1 W 35.6 31 km (20 mi) SE of Calexico, CA
10184353 2.2 2006/05/22 01:54:15 33 56.8 N 116 38.7 W 16.2 12 km ( 8 mi) SSW of Morongo Valley, CA
10184413 2.6 2006/05/22 12:57:44 32 15.6 N 115 3.1 W 6.0 62 km (38 mi) SE of Calexico, CA
10184429 2.7 2006/05/22 13:56:56 33 30.6 N 116 34.9 W 14.8 10 km ( 6 mi) ESE of Anza, CA
10184473 2.2 2006/05/22 22:01:45 32 3.1 N 114 57.7 W 6.0 78 km (49 mi) SSW of Yuma, AZ
10184501 2.3 2006/05/23 00:30:13 35 37.8 N 117 34.3 W 4.8 9 km ( 5 mi) E of Ridgecrest, CA
10184561 2.1 2006/05/23 06:52:24 36 5.8 N 117 55.2 W 6.0 6 km ( 4 mi) NNE of Coso Junction, CA
10184573 2.4 2006/05/23 08:35:08 33 38.8 N 117 55.8 W 14.4 4 km ( 2 mi) N of Newport Beach, CA
Possibly felt in Newport Beach
10184641 2.3 2006/05/23 14:19:23 34 52.7 N 117 55.0 W 2.7 28 km (17 mi) S of California City, CA
10184721 3.9 2006/05/23 21:19:07 32 24.9 N 115 16.9 W 6.0 35 km (21 mi) SE of Calexico, CA
12245763 5.4 2006/05/23 21:20:26 32 18.4 N 115 13.7 W 6.0 47 km (29 mi) SSE of Calexico, CA
Felt widely throughout San Diego County. If you felt this quake, and would like to report it, click here.
10184725 3.5 2006/05/23 21:33:08 32 8.8 N 115 10.4 W 6.0 65 km (41 mi) SSE of Calexico, CA
10184729 3.0 2006/05/23 21:36:57 32 24.7 N 115 13.8 W 6.0 38 km (23 mi) SE of Calexico, CA
10184733 2.7 2006/05/23 21:39:35 32 22.3 N 115 13.6 W 6.0 41 km (26 mi) SE of Calexico, CA
10184741 2.4 2006/05/23 21:41:58 32 21.3 N 115 14.9 W 6.0 42 km (26 mi) SSE of Calexico, CA
10184745 2.5 2006/05/23 21:46:16 32 23.8 N 115 12.5 W 6.0 40 km (25 mi) SE of Calexico, CA
10184753 2.7 2006/05/23 21:48:27 32 21.8 N 115 12.6 W 6.0 43 km (27 mi) SE of Calexico, CA
10184749 3.4 2006/05/23 21:49:58 32 17.5 N 115 14.9 W 6.0 48 km (30 mi) SSE of Calexico, CA
10184761 2.3 2006/05/23 22:01:37 32 20.0 N 115 12.4 W 6.0 46 km (29 mi) SE of Calexico, CA
10184765 2.2 2006/05/23 22:05:10 32 23.3 N 115 12.8 W 6.0 41 km (25 mi) SE of Calexico, CA
10184769 2.5 2006/05/23 22:14:27 32 20.6 N 115 13.0 W 6.0 45 km (28 mi) SE of Calexico, CA
10184781 2.2 2006/05/23 23:29:42 32 21.7 N 115 14.0 W 6.0 42 km (26 mi) SE of Calexico, CA
10184789 2.2 2006/05/23 23:57:15 32 21.0 N 115 14.5 W 6.0 43 km (26 mi) SE of Calexico, CA
10184793 2.3 2006/05/24 00:31:09 32 20.5 N 115 14.3 W 6.0 44 km (27 mi) SSE of Calexico, CA
10184797 2.0 2006/05/24 00:53:06 33 15.3 N 116 7.9 W 9.4 12 km ( 8 mi) N of Ocotillo Wells, CA
10184801 2.1 2006/05/24 01:33:34 32 12.7 N 115 11.6 W 6.0 58 km (36 mi) SSE of Calexico, CA
10184809 2.2 2006/05/24 02:32:16 32 24.0 N 115 10.8 W 6.0 42 km (26 mi) SE of Calexico, CA
10184825 3.1 2006/05/24 02:58:49 32 21.8 N 115 15.2 W 6.0 41 km (25 mi) SSE of Calexico, CA
10184833 2.2 2006/05/24 03:44:08 32 16.2 N 115 11.6 W 6.0 53 km (33 mi) SSE of Calexico, CA
10184901 2.1 2006/05/24 11:51:32 34 1.8 N 117 7.2 W 10.6 6 km ( 4 mi) ESE of Redlands, CA
10184949 2.1 2006/05/24 17:50:41 32 22.4 N 115 12.1 W 6.0 43 km (27 mi) SE of Calexico, CA
10185037 3.0 2006/05/25 06:34:18 36 43.6 N 121 32.8 W 7.7 19 km (12 mi) SW of Hollister, CA

May 24, 2006

ML5.2 just south of US/Mexico border

Filed under: Felt Earthquakes, Significant Events — Administrator @ 5:35 am

At 9:19 pm last night, a ML3.9 quake occurred just south of the U.S./Mexico border, followed at 9:20 pm by a Mw5.4 near the same location (29 miles south-southeast of Calexico). The earthquake sequence that followed has so far included 12 more events, including three more with ML greater than 3.0. The mainshock was reported felt at places in the U.S. along the border from Yuma to Imperial Valley to San Diego, as far north as Blythe & Thermal.

May 23, 2006

Small quake in Orange County

Filed under: Felt Earthquakes — Administrator @ 9:11 am

A ML 2.2 at 8:35 am this morning was felt by a few people in Huntington Beach, Costa Mesa, Fountain Valley & Newport Beach. The preliminary epicenter was located 2 miles east of Costa Mesa.

May 18, 2006

Weekly Report – May 18, 2006

Filed under: Weekly — Anthony Guarino @ 5:08 pm




Southern California Earthquakes in the Past Week

Anthony Guarino
Seismological Laboratory


Lucy Jones U. S. Geological Survey

California Institute of Technology

May 18, 2006

This report covers the seven day period ending 17:00 on May 18, 2006. During this period we detected and analyzed 176 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
-------------------------------------------------------------------------------------------
10183033  2.4  2006/05/14 03:07:53 33 38.9 N 117 54.8 W 14.4    4 km ( 3 mi) NNE  of Newport Beach, CA
10183041  2.1  2006/05/14 06:50:02 33  9.8 N 116  2.0 W  5.7    9 km ( 6 mi) ENE  of Ocotillo Wells, CA
10183089  2.2  2006/05/14 15:14:21 33 59.7 N 117 11.7 W 17.4    7 km ( 4 mi) SSW  of Redlands, CA
10183097  2.3  2006/05/14 16:33:01 32  4.8 N 115 42.4 W  6.0   68 km (42 mi) SSW  of Calexico, CA
10183145  2.0  2006/05/14 21:47:51 32 14.0 N 115 22.5 W  6.0   50 km (31 mi) SSE  of Calexico, CA
10183149  2.5  2006/05/15 00:42:54 32 11.8 N 115 52.3 W  5.4   61 km (38 mi) S    of Ocotillo, CA
10183177  2.7  2006/05/15 07:35:36 32  7.2 N 116 24.8 W  6.0   76 km (47 mi) SE   of San Ysidro, CA
10183209  2.2  2006/05/15 12:52:28 34 19.2 N 119 22.9 W 10.8    9 km ( 5 mi) WNW  of Ventura, CA
10183265  2.4  2006/05/15 18:49:27 35 45.0 N 121  7.7 W  6.0   22 km (14 mi) N    of Cambria, CA
10183273  2.1  2006/05/15 19:17:42 33 10.1 N 116  1.9 W  9.6   10 km ( 6 mi) ENE  of Ocotillo Wells, CA
10183321  2.1  2006/05/16 06:50:31 32 28.4 N 115 31.7 W  7.8   22 km (14 mi) S    of Calexico, CA
10183325  2.1  2006/05/16 07:29:37 32 32.0 N 115 31.6 W 13.1   15 km ( 9 mi) S    of Calexico, CA
10183349  2.5  2006/05/16 08:10:03 32 31.1 N 118  5.0 W 11.0   42 km (26 mi) SE   of San Clemente Is.
10183401  2.3  2006/05/16 13:32:40 36  9.3 N 118 41.9 W  6.6   30 km (19 mi) ENE  of Porterville, CA
10183609  2.2  2006/05/17 15:13:14 32 11.7 N 115 49.0 W  6.0   61 km (38 mi) SSW  of Calexico, CA
10183685  3.2  2006/05/18 03:11:52 34  2.8 N 117  1.6 W 12.5    2 km ( 1 mi) NNE  of Yucaipa, CA
Felt in Yucaipa and surrounding area. Also felt as far away as Murrieta, Palm Desert, Palmdale, and San Bernardino. If you felt this quake, and would like to report it, click here.
10183721  2.6  2006/05/18 08:43:35 34 14.4 N 117 28.9 W  6.3    8 km ( 5 mi) WNW  of Devore, CA  

Filed under: Uncategorized — kate @ 3:26 am

There was a small quake, ML3.2, at 3:11 am this morning, located 2 miles northeast of Yucaipa. It was felt by residents in the epicentral area.

May 11, 2006

Weekly Report – May 11, 2006 1

Filed under: Weekly — Anthony Guarino @ 5:09 pm




Southern California Earthquakes in the Past Week

Anthony Guarino
Seismological Laboratory


Lucy JonesU. S. Geological Survey

California Institute of Technology

May 11, 2006

This report covers the seven day period ending 17:00 on May 11, 2006. During this period we detected and analyzed 180 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
-------------------------------------------------------------------------------------------
10181773  2.9  2006/05/05 07:35:20 32  2.2 N 114 58.4 W  6.0   81 km (50 mi) SSW  of Yuma, AZ
10181777  2.2  2006/05/05 07:45:32 32 10.4 N 115  1.9 W  5.5   70 km (43 mi) SSW  of Yuma, AZ
10181793  2.9  2006/05/05 08:52:11 32 11.5 N 115  2.3 W  6.0   68 km (42 mi) SE   of Calexico, CA
10181797  2.6  2006/05/05 08:56:44 32 14.7 N 115  4.2 W  6.0   62 km (38 mi) SE   of Calexico, CA
10181801  2.4  2006/05/05 09:26:35 32  7.4 N 115  0.1 W  6.2   73 km (45 mi) SSW  of Yuma, AZ
10181817  2.2  2006/05/05 10:07:19 32 10.9 N 115  2.4 W  6.0   69 km (43 mi) SE   of Calexico, CA
10181813  3.0  2006/05/05 10:09:41 32 10.5 N 115  2.0 W  6.0   70 km (43 mi) SSW  of Yuma, AZ
10181837  2.1  2006/05/05 14:15:47 33 59.4 N 118 21.7 W 13.8    2 km ( 1 mi) SSE  of Baldwin Hills, CA
10181869  2.2  2006/05/05 23:10:19 35 39.7 N 117 27.0 W  9.2   14 km ( 9 mi) SSW  of Trona, CA
10181885  2.6  2006/05/06 00:32:02 34 36.3 N 116 17.6 W  5.6   52 km (32 mi) N    of Joshua Tree, CA
10181909  2.0  2006/05/06 03:40:39 36 51.8 N 117 44.6 W  6.0   41 km (25 mi) NE   of Lone Pine, CA
10181913  2.2  2006/05/06 06:51:03 33 42.2 N 116 46.5 W 18.0    7 km ( 5 mi) SW   of Idyllwild, CA
10182033  2.4  2006/05/06 19:33:47 32 39.1 N 115 50.7 W  7.0   17 km (10 mi) SE   of Ocotillo, CA
10182093  2.1  2006/05/07 06:46:09 34  1.8 N 117 34.7 W 10.6    8 km ( 5 mi) ESE  of Ontario, CA
10182121  2.2  2006/05/07 11:04:19 32 20.3 N 115 15.0 W  6.0   43 km (27 mi) SSE  of Calexico, CA
10182129  2.2  2006/05/07 12:11:55 32 37.6 N 117 19.8 W  6.0   18 km (11 mi) SSW  of Mission Beach, CA
10182149  2.7  2006/05/07 18:40:16 35 46.7 N 121 12.6 W  6.0   27 km (17 mi) NNW  of Cambria, CA
10182265  3.6  2006/05/08 17:13:36 32 38.3 N 117 18.9 W 14.3   17 km (10 mi) SSW  of Mission Beach, CA
Felt in San Diego, Mission Beach, Ocean Beach, Oceanside, South Orange County, El Cajon, Murrieta and other areas throughout
northern Baja CA. If you fel this quake, and would like to report it, click here.
10182269  3.1  2006/05/08 17:30:32 32 37.8 N 117 19.3 W 14.0   18 km (11 mi) SSW  of Mission Beach, CA
Felt in San Diego, Mission Beach, Ocean Beach, Oceanside, El Cajon,  and other areas throughout
northern Baja CA.
10182273  2.0  2006/05/08 17:56:20 32 14.8 N 115  6.5 W  6.0   59 km (37 mi) SE   of Calexico, CA
10182361  2.3  2006/05/09 01:39:02 32 32.4 N 115 33.2 W 15.0   15 km ( 9 mi) SSW  of Calexico, CA
10182429  2.2  2006/05/09 12:49:28 34 48.6 N 116 41.8 W  0.6   31 km (19 mi) ESE  of Barstow, CA
10182493  2.5  2006/05/10 04:27:45 32 38.4 N 117 19.3 W 14.2   17 km (10 mi) SSW  of Mission Beach, CA
10182505  2.1  2006/05/10 04:57:13 35 49.1 N 117 40.0 W  8.3   22 km (14 mi) N    of Ridgecrest, CA
10182593  2.2  2006/05/10 16:05:56 33 31.2 N 116 58.1 W 11.4   21 km (13 mi) NNW  of Palomar Observatory, CA
10182641  2.1  2006/05/11 06:15:43 34 23.7 N 116  9.4 W  7.6   30 km (19 mi) NNW  of Twentynine Palms, CA
10182645  2.2  2006/05/11 07:07:29 32  5.3 N 115 47.2 W  6.0   70 km (44 mi) SSW  of Calexico, CA  

May 8, 2006

M3.6 Quake Near Mission Beach (Including a M3.1 Aftershock)- 5/8/06

Filed under: Felt Earthquakes, Significant Events — Anthony Guarino @ 5:42 pm

There was a M3.6 quake at 5:13PM today, located just 11 south-southwest of Mission Beach, CA, just outside of Downtown San Diego. This event was offshore, but was large enough to be felt by several people in the San Diego area. Light shaking was felt as far away as Glendale to the north, Jamul to the east, and Baja California to the south. If you felt this quake, and would like to report it, click here. There was a ShakeMap generated for this event. If you would like to review the ShakeMap for this event, click here. This event has produced one aftershock so far, a M3.1, also felt in the San Diego area. If you felt the aftershock, and would like to report it, click here.

May 4, 2006

Weekly Report – May 4, 2006

Filed under: Weekly — Anthony Guarino @ 5:10 pm




Southern California Earthquakes in the Past Week

Anthony Guarino,
Seismological Laboratory


Lucy Jones, U. S. Geological Survey


California Institute of Technology

May 04, 2006

This report covers the seven day period ending 17:00 on May 04, 2006. During this period we detected and analyzed 214 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
-------------------------------------------------------------------------------------------
10180657  2.0  2006/04/28 15:51:08 33 42.1 N 116 49.9 W 17.9   12 km ( 7 mi) WSW  of Idyllwild, CA
10180669  2.1  2006/04/28 17:43:29 32 41.6 N 115 51.7 W  5.0   13 km ( 8 mi) ESE  of Ocotillo, CA
10180745  2.2  2006/04/29 03:48:38 33 11.5 N 115 36.4 W  3.6    4 km ( 2 mi) NE   of Obsidian Butte, CA
10180929  2.5  2006/04/30 07:37:01 35 55.2 N 114 41.9 W  0.0  119 km (74 mi) N    of Needles, CA
10180965  2.5  2006/04/30 11:41:59 32 18.2 N 115 17.3 W 14.6   45 km (28 mi) SSE  of Calexico, CA
10180985  2.1  2006/04/30 12:54:18 32 17.0 N 115 18.1 W  8.4   46 km (29 mi) SSE  of Calexico, CA
10180993  2.1  2006/04/30 13:57:26 32 17.4 N 115 17.0 W  6.0   47 km (29 mi) SSE  of Calexico, CA
10181017  2.6  2006/04/30 16:57:11 32 40.1 N 115 50.9 W  8.1   15 km (10 mi) ESE  of Ocotillo, CA
10181105  2.1  2006/05/01 06:53:07 32 48.6 N 115 35.9 W 15.7    5 km ( 3 mi) WNW  of El Centro, CA
10181409  2.5  2006/05/03 00:56:06 33 47.2 N 119 27.5 W  6.0   28 km (17 mi) SSE  of Santa Cruz Is.
10181413  2.2  2006/05/03 01:55:21 33 59.7 N 117  9.5 W 15.4    7 km ( 4 mi) SSE  of Redlands, CA
10181469  3.2  2006/05/03 09:22:49 33 31.2 N 116 35.1 W 12.1    9 km ( 6 mi) ESE  of Anza, CA
Felt in Anza, Idyllwild, and surrounding area. If you felt this quake, and would like to report it, click here.
10181485  2.2  2006/05/03 11:04:23 32 19.0 N 115 19.8 W  6.0   42 km (26 mi) SSE  of Calexico, CA
10181529  2.2  2006/05/03 16:29:35 36  1.1 N 117 52.7 W  5.1    7 km ( 4 mi) ESE  of Coso Junction, CA
10181593  2.4  2006/05/04 02:21:34 33 22.8 N 116 25.6 W 15.4   15 km ( 9 mi) NNW  of Borrego Springs, CA
10181625  2.7  2006/05/04 10:07:07 34 43.4 N 116 18.1 W  5.3   64 km (40 mi) SSW  of Baker, CA  

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