Southern California Earthquakes in the Past Week

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

October 8, 1999


The time period covered is 5 pm on Thursday, September 30 (PDT) through 5 pm on Thursday, October 7 (PDT). During this period, we detected and analysed 238 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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 9/30  5:50 pm  35 55.9  119 34.0  2.9  31 mi. SSW of Visalia, CA       
 9/30  6:29 pm  36 12.4  117 54.0  3.3  7 mi. SE of Olancha, CA         
 9/30  6:31 pm  36 12.6  117 53.4  2.5  8 mi. SE of Olancha, CA         
 9/30  6:45 pm  36 13.1  117 53.3  2.1  7 mi. ESE of Olancha, CA        
 9/30 11:06 pm  36 12.7  117 53.4  2.2  8 mi. SE of Olancha, CA         
10/1  10:38 pm  33 17.2  116 14.6  2.9  7 mi. ENE of Borrego Springs, CA
10/2  12:08 am  34  8.2  116 58.3  2.7  7 mi. NNE of Yucaipa, CA        
10/2   7:21 am  36 13.2  117 53.6  2.5  7 mi. SE of Olancha, CA         
10/2   7:51 am  36 13.2  117 53.6  2.5  7 mi. SE of Olancha, CA         
10/2   8:39 am  34  8.9  119 59.2  2.4  6 mi. NNW of Santa Cruz Is., CA 
10/2   8:43 am  34 16.2  119 31.5  2.2  8 mi. S of Carpinteria, CA           
10/2  10:37 am  36 12.3  117 53.5  2.2  8 mi. SE of Olancha, CA              
10/2  10:40 am  36 13.3  117 53.7  2.2  7 mi. ESE of Olancha, CA             
10/2   3:50 pm  33  2.2  116 21.5  2.2  15 mi. S of Borrego Springs, CA      
10/2   4:03 pm  33  1.6  115 33.7  2.0  3 mi. ESE of Westmorland, CA         
10/2   8:39 pm  35 50.0  117 31.4  2.2  9 mi. WNW of Trona, CA               
10/3   3:14 am  32 13.8  115 40.2  3.6  31 mi. SSW of Calexico, CA           
10/3   3:41 am  33 56.2  117 10.3  2.0  8 mi. S of Redlands, CA              
10/3   4:04 am  36 12.5  117 53.8  3.0  7 mi. SE of Olancha, CA              
10/3   4:54 am  33  3.0  115 54.1  3.4  16 mi. SSE of Salton City, CA        
10/3   4:56 am  33  3.2  115 54.3  2.9  15 mi. SSE of Salton City, CA        
10/3   6:05 am  33  3.0  115 54.0  2.1  16 mi. SSE of Salton City, CA        
10/3   6:20 am  33  3.1  115 53.9  2.0  16 mi. SSE of Salton City, CA        
10/3   6:25 am  33  3.0  115 54.0  2.9  16 mi. SSE of Salton City, CA        
10/3   6:30 am  33  3.0  115 54.3  2.9  16 mi. SSE of Salton City, CA        
10/3   8:29 am  33  2.8  115 53.8  2.2  16 mi. SSE of Salton City, CA        
10/3  11:12 am  33  2.6  115 54.0  2.2  16 mi. SSE of Salton City, CA        
10/3  12:15 pm  36 13.0  117 53.4  2.2  7 mi. SE of Olancha, CA              
10/3   1:29 pm  33  4.1  117 49.5  2.3  27 mi. SSW of Dana Point, CA         
10/3   5:20 pm  33  9.7  115 39.0  2.8  1 mi. SW of Obsidian Butte, CA       
10/3   7:21 pm  34  6.8  116 55.1  2.3  5 mi. W of Mt. San Gorgonio, CA      
10/3  10:43 pm  35 47.4  118 26.5  2.2  10 mi. N of town of Lake Isabella, CA
10/4   9:13 am  33  3.1  115 53.7  2.5  16 mi. SSE of Salton City, CA        
10/4   6:19 pm  33 48.6  118  6.5  2.2  3 mi. SSE of Lakewood, CA            
10/4  10:43 pm  34 18.3  116 25.3  2.0  12 mi. N of Yucca Valley, CA         
10/5  12:58 am  34 22.2  119 16.4  2.1  5 mi. SSW of Ojai, CA                
10/5   1:11 am  36  0.4  117 48.0  2.1  8 mi. ESE of Coso Junction, CA       
10/5   1:31 am  33 55.3  118 46.9  2.3  5 mi. SSE of Pt. Dume, CA            
10/5   8:24 am  32 34.6  116  9.1  2.1  14 mi. SW of Ocotillo, CA            
10/5   9:53 am  34  9.8  116 25.8  2.0  3 mi. NNE of Yucca Valley, CA        
10/5  10:59 am  34  9.8  116 25.8  2.2  3 mi. NNE of Yucca Valley, CA        
10/5  12:42 pm  34 20.9  119 17.5  2.2  4 mi. N of Ventura, CA               
10/5   4:25 pm  33 20.9  116 22.4  2.0  6 mi. N of Borrego Springs, CA       
10/6   8:11 am  32 58.1  115 33.2  2.2  1 mi. WNW of Brawley, CA             
10/6  10:35 am  34 21.2  119 17.0  2.1  5 mi. N of Ventura, CA               
10/6   1:15 pm  34 23.9  119 26.1  3.4  4 mi. E of Carpinteria, CA           
                                        FELT
10/6   1:29 pm  33 37.4  116 40.9  2.5  4 mi. N of Anza, CA                  
10/6   1:47 pm  33 10.6  115 37.5  2.0  Under Obsidian Butte, CA            
10/6   5:54 pm  32 49.6  115 28.3  2.0  5 mi. ENE of El Centro, CA           
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