Southern California Earthquakes in the Past Week

Kate Hutton , Seismological Laboratory
Lucy Jones, U. S. Geological Survey
California Institute of Technology

October 1, 1998


The time period covered is 5 pm on Thursday, September 24 through 5 pm on Thursday, October 1. During this period, we detected and analysed 209 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. In the perepheral areas, quakes larger than M2.5 are listed. 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.

Date  Time(PDT) Lat.     Long.     Mag. Descriptive location
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 9/24  7:24 pm  33 42.6  116 50.3  2.4  7 mi. WSW of Idyllwild, CA
 9/25 12:15 pm  36  4.9  117 35.9  2.0  19 mi. E of Coso Junction, CA
 9/25  6:57 pm  33 56.9  117  7.7  2.1  7 mi. SSE of Redlands, CA
 9/26 12:38 am  36  2.8  117 38.5  2.0  17 mi. E of Coso Junction, CA
 9/26  6:25 am  33 59.1  116 47.1  2.5  4 mi. N of Cabazon, CA
 9/26  9:30 am  34 28.9  116 29.4  2.7  25 mi. N of Yucca Valley, CA
 9/26  2:13 pm  34  6.5  116 55.1  2.4  5 mi. W of Mt. San Gorgonio, CA
 9/26  6:04 pm  35 44.9  117 38.0  2.2  8 mi. NNE of Ridgecrest, CA
 9/26 11:33 pm  33 43.0  116 50.4  2.0  7 mi. WSW of Idyllwild, CA
 9/27  1:36 am  36  4.7  117 36.3  2.4  19 mi. E of Coso Junction, CA
 9/27  3:57 am  34 12.0  119 32.9  2.0  11 mi. N of Santa Cruz Is., CA 
 9/27  5:04 am  32  6.1  115 38.8  3.0  40 mi. SSW of Calexico, CA
 9/27  7:17 am  35 55.5  117 45.5  2.0  13 mi. SE of Coso Junction, CA
 9/27 10:36 am  34 58.7  116 57.6  2.2  7 mi. NNE of Barstow, CA
 9/27  2:27 pm  34  7.1  116 55.8  2.2  5 mi. WNW of Mt. San Gorgonio, CA
 9/27  7:07 pm  34 20.4  116 52.7  2.4  5 mi. NNW of Big Bear City, CA
 9/28  4:41 am  33 47.8  120  0.6  2.1  11 mi. SSE of Santa Rosa Is., CA
 9/28  5:18 pm  33 59.6  116 48.1  2.0  5 mi. N of Cabazon, CA
 9/28  5:25 pm  34  7.7  116 55.0  2.0  5 mi. WNW of Mt. San Gorgonio, CA
 9/28 11:46 pm  35 47.7  118 30.2  2.7  11 mi. N of town of Lake Isabella, CA
 9/29 12:23 am  33 28.8  116 27.1  2.0  13 mi. ESE of Anza, CA
 9/29  1:00 am  33 54.6  118 54.2  2.3  8 mi. SW of Pt. Dume, CA
 9/29  2:34 am  34 45.8  116 35.0  2.5  26 mi. ESE of Barstow, CA
 9/29 11:36 am  34 19.9  116 50.6  2.0  4 mi. N of Big Bear City, CA
 9/29  6:46 pm  32  4.1  115 24.8  2.7  41 mi. S of Calexico, CA
 9/29  8:50 pm  34  2.4  117 33.7  2.7  4 mi. SSE of Rancho Cucamonga, CA; FELT
 9/29 11:21 pm  34 12.7  118 35.2  2.0  1 mi. NE of Canoga Park, CA
 9/30 11:59 am  32 47.4  115 27.3  2.9  5 mi. E of El Centro, CA
 9/30 12:41 pm  34 19.4  116 50.4  2.3  4 mi. N of Big Bear City, CA
 9/30  7:58 pm  34 18.2  116 55.3  2.5  4 mi. N of town of Big Bear Lake, CA
 9/30 10:11 pm  34 56.9  117  1.5  2.3  4 mi. N of Barstow, CA
 9/30 11:09 pm  34  9.9  116 26.2  2.1  3 mi. N of Yucca Valley, CA
10/1   3:23 am  34 29.5  120 51.0  2.6  12 mi. WSW of Pt. Arguello, CA
10/1   6:59 am  34 18.8  116 55.4  3.4  4 mi. N of town of Big Bear Lake, CA
10/1  11:18 am  34  6.9  116 55.1  4.7  5 mi. W of Mt. San Gorgonio, CA
                                        WIDELY FELT from San Diego to Pasadena
10/1  11:23 am  34  6.2  116 55.9  2.4  6 mi. W of Mt. San Gorgonio, CA
10/1  11:36 am  34  6.9  116 55.9  2.2  6 mi. W of Mt. San Gorgonio, CA
10/1   1:28 pm  32 38.6  115 59.1  3.0  6 mi. S of Ocotillo, CA
10/1   1:46 pm  34  6.7  116 55.1  2.2  5 mi. W of Mt. San Gorgonio, CA
10/1   1:56 pm  34  6.7  116 55.8  2.3  6 mi. W of Mt. San Gorgonio, CA
10/1   2:18 pm  34  0.1  116 20.1  2.4  9 mi. S of Joshua Tree, CA
10/1   3:17 pm  34  6.5  116 55.8  2.1  5 mi. W of Mt. San Gorgonio, CA