Southern California Earthquakes in the Past Week

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

March 26, 1999


The time period covered is 4 pm on Thursday, March 18 (PST) through 4 pm on Thursday, March 25 (PST). During this period, we detected and analysed 154 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      Lat.     Long.     Mag. Descriptive location
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 3/18  4:18 pm  32  4.2  115 24.1  2.6  41 mi. S of Calexico, CA       
 3/19  1:48 am  33 47.1  118  8.7  2.4  1 mi. SE of Signal Hill, CA    
 3/19  2:46 am  34 59.2  116 57.1  2.4  7 mi. NNE of Barstow, CA       
 3/19  8:45 am  33 11.7  115 36.5  2.0  2 mi. NE of Obsidian Butte, CA 
 3/19  8:45 am  33 11.4  115 36.4  2.7  2 mi. NE of Obsidian Butte, CA 
 3/19  8:46 am  33 11.5  115 36.3  2.6  2 mi. NE of Obsidian Butte, CA 
 3/19  8:47 am  33 12.1  115 36.7  2.0  2 mi. NE of Obsidian Butte, CA 
 3/19  8:48 am  33 11.5  115 36.2  2.9  2 mi. NE of Obsidian Butte, CA 
 3/19  8:52 am  33 10.9  115 36.9  2.2  1 mi. NE of Obsidian Butte, CA 
 3/19 12:50 pm  34  1.8  116 52.8  2.6  5 mi. SSW of Mt. San Gorgonio, CA
 3/19  3:30 pm  34 20.3  116 27.9  2.7  15 mi. N of Yucca Valley, CA    
 3/19 10:12 pm  35 55.0  117 42.0  2.0  16 mi. ESE of Coso Junction, CA 
 3/20  6:14 pm  34 24.9  120 46.9  2.8  13 mi. SW of Pt. Arguello, CA   
 3/20  6:43 pm  33 13.6  116 46.0  2.0  Under Lake Henshaw, CA          
 3/20  7:53 pm  33 17.1  116 13.3  2.0  8 mi. ENE of Borrego Springs, CA
 3/20  8:16 pm  34 17.2  116 41.0  2.0  9 mi. E of Big Bear City, CA    
 3/21  5:53 am  35 41.3  118 27.0  3.1  3 mi. NNE of town of Lake Isabella, CA
 3/21 12:54 pm  32  9.9  117  0.2  2.5  26 mi. S of San Ysidro, CA     
 3/21  3:31 pm  34 19.8  116 51.0  2.7  4 mi. N of Big Bear City, CA   
 3/21  6:17 pm  35 45.3  117 30.7  2.8  8 mi. W of Trona, CA           
 3/22 12:31 am  34  2.0  117 13.5  3.8  1 mi. SE of Loma Linda, CA; FELT
 3/22 12:39 am  34  2.3  117 14.1  2.5  1 mi. ESE of Loma Linda, CA    
 3/22  3:49 am  34  2.0  116 20.8  2.1  7 mi. SSW of Joshua Tree, CA   
 3/22 10:13 am  34 23.3  118 38.9  2.1  4 mi. W of Valencia, CA        
 3/22  8:09 pm  33  9.5  115 55.0  2.1  8 mi. SSE of Salton City, CA   
 3/22 10:16 pm  33  9.8  115 55.1  2.5  8 mi. SSE of Salton City, CA   
 3/22 10:38 pm  33 11.3  115 33.9  2.4  4 mi. SW of Niland, CA         
 3/23  6:17 am  32 35.5  116  9.6  2.4  13 mi. SW of Ocotillo, CA      
 3/23  7:19 am  34  2.0  116 21.0  2.0  7 mi. SSW of Joshua Tree, CA   
 3/23  9:02 am  34 19.9  116 50.8  2.1  4 mi. N of Big Bear City, CA   
 3/23  1:39 pm  33 14.8  115 59.9  2.2  2 mi. SW of Salton City, CA    
 3/23 11:35 pm  32 41.8  116  0.5  2.5  2 mi. SSW of Ocotillo, CA      
 3/24  1:11 pm  33  0.7  116  5.2  2.3  9 mi. SSE of Ocotillo Wells, CA
 3/24  3:16 pm  34 31.7  116 31.1  2.2  28 mi. N of Yucca Valley, CA   
 3/24  4:56 pm  34  3.1  118 55.9  2.2  Under Leo Carrillo State Beach, CA
 3/25 10:03 am  32 39.0  115 38.9  2.4  8 mi. W of Calexico, CA        
 3/25 10:20 am  34  0.1  116 19.4  2.8  9 mi. S of Joshua Tree, CA     
 3/25  2:40 pm  33 59.2  116 19.4  2.1  10 mi. S of Joshua Tree, CA    
 3/25  3:47 pm  34 37.2  116 39.8  2.0  20 mi. NE of Lucerne Valley, CA
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