Southern California Earthquakes in the Past Week

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

December 10, 1999


The time period covered is 4 pm on Thursday, December 2 (PDT) through 4 pm on Thursday, December 9 (PDT). During this period, there were 471 earthquakes listed in the partially-reviewed automatic catalog. 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. For the Hector aftershocks, we have only listed M2.5 and larger, and, in the perepheral areas, only 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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12/2   4:47 pm  35 51.0  117 46.2  2.3  16 mi. NNW of Ridgecrest, CA    
12/2   8:03 pm  34 51.9  116 23.8  2.7  33 mi. SSW of Baker, CA         
12/2   9:14 pm  34 22.5  116 28.3  2.4  17 mi. N of Yucca Valley, CA    
12/2   9:41 pm  34 15.2  118 26.9  2.5  2 mi. N of Panorama City, CA    
12/2   9:54 pm  34 39.8  116 20.2  3.1  36 mi. N of Joshua Tree, CA     
12/3   1:41 am  33 40.3  116 44.1  2.0  5 mi. SSW of Idyllwild, CA      
12/3   2:07 am  34 52.8  116 20.5  2.6  30 mi. SSW of Baker, CA         
12/3   2:48 am  32 52.5  116 16.7  2.0  20 mi. SSW of Ocotillo Wells, CA
12/3   9:34 am  33 10.1  116  5.3  2.1  3 mi. NE of Ocotillo Wells, CA  
12/3   9:50 am  34 50.3  116 24.2  3.3  34 mi. SSW of Baker, CA         
12/3  10:07 am  34 19.9  116 29.1  2.4  14 mi. N of Yucca Valley, CA    
12/3   1:23 pm  34 52.1  116 18.8  2.5  30 mi. SSW of Baker, CA         
12/3   2:36 pm  34 38.9  116 18.2  2.6  35 mi. N of Joshua Tree, CA     
12/3   3:32 pm  34 56.6  116 24.4  2.6  29 mi. SW of Baker, CA          
12/3   8:22 pm  34 32.8  116 15.4  2.8  28 mi. N of Joshua Tree, CA     
12/3   9:47 pm  34 43.6  116  6.1  3.1  37 mi. S of Baker, CA           
12/3  10:50 pm  34 54.1  116 25.2  3.0  31 mi. SW of Baker, CA          
12/4   3:53 am  34 35.2  116 15.8  3.1  31 mi. N of Joshua Tree, CA     
12/4   4:11 am  34 30.8  116  5.9  3.0  26 mi. N of Twentynine Palms, CA
12/4   4:56 am  34 51.7  116 24.9  2.5  33 mi. SW of Baker, CA          
12/4   5:10 am  34 49.8  116 24.1  3.1  35 mi. SSW of Baker, CA         
12/4   4:04 pm  34 48.3  116 24.8  2.5  37 mi. SSW of Baker, CA         
12/5   1:38 am  34 41.1  116 21.0  2.6  37 mi. N of Joshua Tree, CA     
12/5   2:56 am  34 28.8  116 15.9  2.5  23 mi. N of Joshua Tree, CA     
12/5   4:22 am  34 51.9  116 23.7  2.7  33 mi. SSW of Baker, CA         
12/5   6:20 am  34 38.7  116 17.5  2.6  35 mi. N of Joshua Tree, CA     
12/5  10:38 pm  34 11.0  116 26.3  2.0  4 mi. N of Yucca Valley, CA     
12/6   2:48 am  34 25.5  116 12.0  3.0  20 mi. NNE of Joshua Tree, CA   
12/6   4:03 am  34 18.5  116  4.3  2.6  11 mi. N of Twentynine Palms, CA
12/6   9:17 am  35  0.7  119 11.1  2.5  13 mi. W of Wheeler Ridge, CA   
12/6  12:14 pm  32 22.8  115 18.7  2.3  22 mi. SSE of Calexico, CA      
12/6   2:15 pm  34 47.8  116 17.1  2.6  34 mi. SSW of Baker, CA         
12/7   7:59 am  33 35.0  118 14.0  2.2  9 mi. SSE of Pt. Fermin, San Pedro, CA
12/7  10:20 am  35 41.1  116 29.9  2.4  23 mi. SSW of Shoshone, CA       
12/7  11:11 am  34  5.6  116 59.8  2.2  4 mi. NNE of Yucaipa, CA         
12/7  11:25 am  34 47.9  116 19.4  2.5  35 mi. SSW of Baker, CA          
12/7  11:26 am  34 41.7  116 18.2  2.5  38 mi. N of Joshua Tree, CA      
12/7   1:26 pm  34 51.9  116 18.8  2.6  30 mi. SSW of Baker, CA          
12/7   1:58 pm  33 48.3  117 43.1  3.9  7 mi. NE of Tustin, CA           
                                        FELT widely in L.A. and Orange Counties
12/7   2:24 pm  33 49.1  117 42.3  2.1  7 mi. SE of Yorba Linda, CA      
12/7   2:54 pm  34 51.9  116 18.9  2.6  30 mi. SSW of Baker, CA          
12/7   6:23 pm  34 40.0  116 17.7  2.6  36 mi. N of Joshua Tree, CA      
12/7   7:17 pm  34 48.8  116 16.3  2.0  33 mi. SSW of Baker, CA          
12/7   8:08 pm  34 35.7  116 16.4  2.6  31 mi. N of Joshua Tree, CA      
12/7   9:58 pm  34 42.6  116  7.2  2.6  38 mi. S of Baker, CA            
12/7  10:39 pm  34 38.9  116 17.3  2.6  35 mi. N of Joshua Tree, CA      
12/7  11:35 pm  34 51.4  116 20.5  3.8  32 mi. SSW of Baker, CA          
12/8  12:06 am  32 56.8  115 31.2  2.0  1 mi. SE of Brawley, CA          
12/8  12:22 am  34 51.3  116 20.2  2.5  32 mi. SSW of Baker, CA          
12/8   1:16 am  33 48.2  117 43.4  2.0  7 mi. NE of Tustin, CA           
12/8   2:53 am  34  2.4  117 14.7  3.2  Under Loma Linda, CA                
12/8   4:54 am  34  2.6  117 14.4  2.1  Under Loma Linda, CA                
12/8   5:02 am  33 28.5  116 48.8  2.4  8 mi. NNE of Palomar Observatory, CA
12/8   6:55 am  33  5.1  117 58.4  2.7  26 mi. SE of Avalon, Catalina Island, CA
12/8   7:27 am  33 48.7  117 42.8  2.0  7 mi. SE of Yorba Linda, CA         
12/8   9:38 am  35 40.0  117 37.7  2.1  3 mi. NE of Ridgecrest, CA          
12/8  10:36 am  34 49.9  116 24.4  2.5  35 mi. SSW of Baker, CA             
12/8   1:38 pm  33 48.4  117 43.2  2.1  7 mi. NE of Tustin, CA              
12/8  11:48 pm  33 58.8  116 58.3  2.0  3 mi. N of Beaumont, CA             
12/9   7:27 am  34 34.7  116 17.9  2.7  30 mi. N of Joshua Tree, CA         
12/9   1:24 pm  33 49.7  116 37.7  2.3  4 mi. WNW of Palm Springs, CA       
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