Southern California Earthquakes in the Past Week

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

August 6, 1999


The time period covered is 5 pm on Thursday, July 29 (PDT) through 5 pm on Thursday, August 5 (PDT). During this period, we detected and analysed 168 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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 7/29 11:49 pm  35 43.8  118 28.4  2.1  6 mi. N of town of Lake Isabella, CA
 7/29 11:59 pm  35 59.4  118 53.0  2.1  9 mi. SE of Porterville, CA         
 7/30  1:25 am  34  2.0  117  8.7  2.2  2 mi. SE of Redlands, CA            
 7/30  2:37 am  34 20.7  116 28.4  2.3  15 mi. N of Yucca Valley, CA        
 7/30  2:48 am  34  6.7  116 55.5  2.1  5 mi. W of Mt. San Gorgonio, CA     
 7/30  4:46 am  33 29.4  116 28.0  2.1  12 mi. ESE of Anza, CA              
 7/30  3:35 pm  35 37.2  116 26.9  2.3  26 mi. SSW of Shoshone, CA          
 7/31  3:11 am  35 55.4  117 45.4  2.8  13 mi. SE of Coso Junction, CA      
 7/31  3:36 am  33 15.7  116  0.1  2.9  2 mi. WSW of Salton City, CA        
 7/31  8:45 am  36  0.4  117 47.9  2.0  8 mi. ESE of Coso Junction, CA      
 7/31 11:23 am  35 43.2  117 38.8  2.2  6 mi. N of Ridgecrest, CA           
 7/31  1:16 pm  35 48.2  117 36.3  2.1  12 mi. NNE of Ridgecrest, CA        
 7/31  7:01 pm  34 59.7  116 57.6  2.1  8 mi. NNE of Barstow, CA            
 8/1   4:55 am  32 46.9  115 26.0  2.1  6 mi. E of El Centro, CA            
 8/1   8:30 am  34 58.1  117  1.8  2.3  5 mi. N of Barstow, CA              
 8/1   8:31 am  34 20.5  116 28.6  2.3  15 mi. N of Yucca Valley, CA        
 8/1  10:32 am  36  4.3  118 20.2  2.2  21 mi. W of Coso Junction, CA       
 8/1   8:36 pm  33 28.7  116 26.7  2.3  16 mi. NNW of Borrego Springs, CA   
 8/1  10:44 pm  34 19.9  116 39.1  2.2  12 mi. ENE of Big Bear City, CA     
 8/2   3:10 am  33 44.9  119 33.8  2.0  19 mi. S of Santa Cruz Is., CA (E end)
 8/2   4:16 am  35 45.9  117 39.0  2.0  9 mi. N of Ridgecrest, CA           
 8/2   7:20 am  34 59.6  116 57.4  2.2  8 mi. NNE of Barstow, CA            
 8/2   6:25 pm  34 37.2  116 34.4  2.0  24 mi. ENE of Lucerne Valley, CA    
 8/3  12:29 am  36 27.5  117 51.4  2.3  14 mi. NE  of Olancha, CA           
 8/3   5:11 am  33 59.1  116 59.3  2.0  4 mi. N of Beaumont, CA             
 8/4  12:38 pm  33 55.8  116 19.0  2.0  10 mi. ESE of Desert Hot Springs, CA
 8/4   3:57 pm  36  0.3  117 48.2  2.3  8 mi. ESE of Coso Junction, CA      
 8/4  11:45 pm  34 57.3  116 47.3  2.2  14 mi. ENE of Barstow, CA           
 8/5  12:09 am  34 58.2  117  1.6  2.3  5 mi. N of Barstow, CA              
 8/5   4:12 am  33  9.3  115 39.0  2.2  1 mi. SW of Obsidian Butte, CA      
 8/5   5:03 am  36  3.8  117 38.0  2.1  17 mi. E of Coso Junction, CA       
 8/5   5:33 am  34 57.8  118 33.8  2.0  13 mi. SSW of Tehachapi, CA         
 8/5  12:05 pm  32 33.5  116 10.3  2.2  16 mi. SW of Ocotillo, CA           
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