Southern California Earthquakes in the Past Week

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

August 7, 1998


The time period covered is 5 pm on Thursday, July 30 through 5 pm on Thursday, August 6, local time. During this period, we detected and analysed 183 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
-----------------------------------------------------------
 7/30 11:16 pm  32 42.5  117 24.2  2.1  9 mi. WSW of Mission Beach, CA
 7/31  2:37 am  33 19.6  118 52.7  3.2  14 mi. SE of Santa Barbara Is., CA
 7/31  6:08 am  33 41.7  116 49.3  2.0  7 mi. WSW of Idyllwild, CA
 7/31 11:54 am  34  7.3  116 51.4  2.2  2 mi. NW of Mt. San Gorgonio, CA
 7/31 12:12 pm  34  7.3  116 51.4  2.8  2 mi. NW of Mt. San Gorgonio, CA
 7/31  4:51 pm  36  7.0  117 49.3  2.1  8 mi. NE of Coso Junction, CA
 7/31  5:05 pm  32  3.0  117 25.5  2.5  41 mi. SSW of San Ysidro, CA
 8/1   1:57 pm  33 58.3  118 23.6  2.3  2 mi. S of Culver City, CA
 8/1   5:44 pm  33  9.0  115 56.4  2.5  9 mi. S of Salton City, CA
 8/1   8:40 pm  32  0.8  115 44.1  3.1  47 mi. SSW of Calexico, CA
 8/2   1:42 am  34 36.9  116 39.2  2.1  20 mi. NE of Lucerne Valley, CA
 8/2   5:03 pm  36  3.4  117 38.5  2.8  17 mi. E of Coso Junction, CA
 8/2   5:27 pm  36  3.4  117 38.4  2.3  17 mi. E of Coso Junction, CA
 8/2   5:45 pm  32  3.7  115 32.6  3.3  42 mi. S of Calexico, CA
 8/2   6:10 pm  34 59.8  116 52.7  2.2  11 mi. NE  of Barstow, CA
 8/2   6:30 pm  32  2.2  115 32.4  3.7  43 mi. S of Calexico, CA
 8/2   7:21 pm  34  8.8  116 26.1  2.3  2 mi. NNE of Yucca Valley, CA
 8/2   7:33 pm  34  8.8  116 26.1  2.1  2 mi. NNE of Yucca Valley, CA
 8/2  10:08 pm  36 57.6  117 28.9  2.0  30 mi. NW of Stovepipe Wells, CA
 8/3  12:51 am  35 55.8  118 17.8  2.0  22 mi. NNE of town of Lake Isabella
 8/3   1:11 am  36  0.9  117 42.4  2.3  13 mi. E of Coso Junction, CA
 8/3   5:43 am  36  0.7  117 42.5  2.2  13 mi. E of Coso Junction, CA
 8/3  12:05 pm  36  1.0  117 42.4  2.0  13 mi. E of Coso Junction, CA
 8/3   1:27 pm  33 23.5  116 18.9  2.4  10 mi. NNE of Borrego Springs, CA
 8/3   7:15 pm  33 24.1  116 21.5  2.1  10 mi. N of Borrego Springs, CA
 8/4   4:05 am  32 58.1  116 22.2  2.9  15 mi. ESE of Julian, CA
 8/4  12:29 pm  32 47.7  116 39.0  2.0  19 mi. S of Julian, CA
 8/4   9:50 pm  33 59.8  116 56.2  2.9  5 mi. NNE of Beaumont, CA
 8/5  12:34 am  35 46.7  117 37.6  2.3  11 mi. NNE of Ridgecrest, CA
 8/5   2:49 am  36  2.6  117 42.8  2.1  13 mi. E of Coso Junction, CA
 8/5   3:43 am  32 57.9  117 41.6  2.8  24 mi. SW of Oceanside, CA
 8/5   8:53 am  32 58.3  115 33.2  2.3  1 mi. NW of Brawley, CA
 8/5   8:29 pm  34 17.5  116 50.9  2.8  1 mi. N of Big Bear City, CA
 8/5   8:40 pm  34 17.4  116 50.9  2.2  1 mi. N of Big Bear City, CA
 8/5   8:41 pm  34 18.1  116 50.3  2.1  2 mi. NNE of Big Bear City, CA
 8/5   9:54 pm  34 17.3  116 50.6  2.1  1 mi. NNE of Big Bear City, CA
 8/6  12:24 am  34 17.6  116 50.4  2.0  2 mi. NNE of Big Bear City, CA
 8/6   1:41 am  34 17.4  116 50.8  2.5  1 mi. NNE of Big Bear City, CA
 8/6   1:47 am  34  2.3  117 35.4  2.2  3 mi. ESE of Ontario, CA
 8/6   1:06 pm  34  1.0  116 19.3  2.0  8 mi. S of Joshua Tree, CA
 8/6   4:16 pm  36  5.1  117 51.6  2.2  5 mi. ENE of Coso Junction, CA