SOUTHERN CALIFORNIA SEISMOGRAPHIC NETWORK A Cooperative Project of Caltech and the U.S. Geological Survey December 28, 1995 Weekly Earthquake Report for Southern California ------------------------------------------------ December 21 - 27, 1995 Prepared by: Nick Scheckel, Seismological Laboratory (kate@bombay.gps.caltech.edu) California Institute of Technology For further information, please contact the authors or the Caltech Public Relations Office at 818-395-6326. For daily updates, call our Earthquake Information Hotline: 818-395-6977. -------------------------------- This week's Report covers the time period from midnight Thursday morning, December 21, Universal Time (ie. GMT), to midnight Wednesday night, December 27, 1995, Universal Time. In local time, the period of coverage is from 4 p.m., December 21 to 4 p.m., December 27 Pacific Standard Time. We detected and processed 422 earthquakes during the 7-day period covered. The rate of seismicity this week was a little lower than last weeks though the number of felt quakes increased. The largest felt event, a M3.7, occurred on the afternoon of Christmas day near the city of Niland. Later that evening, a M3.3 quake was felt by the people of Idyllwild. On Wednesday about noon two earthquakes were felt, a M3.1 in El Centro and a M2.9 near Niland. The table lists the quakes this week that were M2.0 or larger in the central part of the coverage area. 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. Table 1 ------- Date Time N Lat. W Long. Mag ------------------------------------------------------------- 12/20 5:39 pm 34 21.6 119 59.8 2.0 8 mi. WSW of Isla Vista 12/20 6:08 pm 34 20.0 116 27.4 2.2 14 mi. N of Yucca Valley 12/20 9:55 pm 34 8.4 117 43.7 2.4 2 mi. N of Claremont Colleges 12/21 1:30 am 35 48.1 117 41.4 2.1 12 mi. N of Ridgecrest 12/21 5:07 am 32 12.5 117 39.5 2.3 45 mi. SSW of Mission Beach 12/21 12:30 pm 34 52.1 118 29.8 2.5 15 mi. NNW of Elizabeth Lake 12/21 3:14 pm 35 44.6 117 38.1 2.0 8 mi. NNE of Ridgecrest 12/22 2:32 am 35 57.7 117 39.6 2.4 17 mi. ESE of Coso Junction 12/22 5:45 am 34 22.0 116 27.3 2.1 17 mi. N of Yucca Valley 12/22 4:06 pm 32 2.5 116 17.5 2.1 50 mi. SSW of Ocotillo 12/22 7:47 pm 35 58.3 117 39.2 2.1 17 mi. ESE of Coso Junction 12/23 12:44 am 35 48.3 117 37.8 2.0 12 mi. N of Ridgecrest 12/23 2:20 pm 34 0.7 116 44.2 2.6 6 mi. NNE of Cabazon 12/23 3:57 pm 35 44.6 117 40.8 2.1 8 mi. N of Ridgecrest 12/23 7:52 pm 35 47.2 117 38.9 2.3 11 mi. N of Ridgecrest 12/24 12:06 am 35 45.7 117 39.2 2.5 9 mi. N of Ridgecrest 12/24 2:36 am 34 55.2 116 44.2 2.0 16 mi. E of Barstow 12/24 3:44 am 36 0.1 117 47.7 2.5 9 mi. ESE of Coso Junction 12/24 8:16 am 33 31.3 116 33.0 2.3 7 mi. ESE of Anza 12/24 10:59 am 35 46.5 117 37.4 2.1 10 mi. NNE of Ridgecrest 12/24 11:16 am 33 35.5 116 38.2 2.7 3 mi. NE of Anza 12/24 12:06 pm 32 41.9 115 57.4 2.3 3 mi. SE of Ocotillo 12/24 6:00 pm 35 44.6 117 38.2 2.0 8 mi. NNE of Ridgecrest 12/24 7:59 pm 35 56.3 117 42.8 2.5 15 mi. ESE of Coso Junction 12/24 11:07 pm 33 44.3 118 51.9 2.1 18 mi. S of Pt. Dume 12/24 11:49 pm 34 16.6 116 50.6 2.0 1 mi. NNE of Big Bear City 12/25 6:03 am 33 21.6 116 22.2 2.6 7 mi. N of Borrego Springs 12/25 3:38 pm 33 11.0 115 36.0 2.1 2 mi. ENE of Obsidian Butte 12/25 3:40 pm 33 11.1 115 36.3 3.7 " FELT 12/25 4:48 pm 35 40.0 117 35.4 2.1 5 mi. NE of Ridgecrest 12/25 5:09 pm 34 21.3 116 25.7 2.4 16 mi. N of Yucca Valley 12/25 6:19 pm 32 47.5 115 27.4 2.2 5 mi. E of El Centro 12/25 6:20 pm 32 47.5 115 27.5 2.3 " 12/25 6:21 pm 32 47.2 115 27.3 2.7 " 12/25 7:14 pm 35 45.8 117 38.7 2.0 9 mi. N of Ridgecrest 12/25 7:40 pm 33 11.2 115 35.7 2.0 2 mi. ENE of Obsidian Butte 12/25 9:44 pm 33 42.2 116 46.0 3.3 4 mi. SW of Idyllwild FELT 12/25 11:10 pm 35 9.0 116 50.4 2.0 14 mi. S of Goldstone Lake 12/26 1:39 am 35 56.1 117 42.8 2.0 15 mi. ESE of Coso Junction 12/26 5:09 am 32 17.5 116 22.4 2.5 37 mi. SW of Ocotillo 12/26 9:18 am 33 10.8 115 35.9 2.0 2 mi. ENE of Obsidian Butte 12/26 1:29 pm 33 46.7 116 8.0 2.0 6 mi. NE of Indio 12/26 3:48 pm 35 1.4 116 57.8 2.5 9 mi. NNE of Barstow 12/26 6:10 pm 32 40.7 116 0.7 2.3 4 mi. SSW of Ocotillo 12/27 12:25 am 33 30.7 119 13.2 2.0 9 mi. WNW of Santa Barbara Island 12/27 1:29 am 33 22.2 116 57.7 2.2 5 mi. W of Palomar Observatory 12/27 2:03 am 33 60.0 118 41.0 2.0 2 mi. S of Malibu 12/27 2:09 am 34 23.6 116 27.6 2.1 18 mi. N of Yucca Valley 12/27 5:56 am 34 2.0 117 14.8 2.1 1 mi. SSE of Loma Linda 12/27 11:28 am 32 46.8 115 27.6 3.1 5 mi. E of El Centro FELT 12/27 12:10 pm 33 12.0 115 36.2 2.9 2 mi. NE of Obsidian Butte FELT 12/27 12:12 pm 33 12.8 115 35.3 2.2 4 mi. NE of Obsidian Butte 12/27 12:13 pm 33 12.9 115 35.1 2.1 " 12/27 12:14 pm 33 12.4 115 35.1 2.2 3 mi. NE of Obsidian Butte -------------------------------------------------------------