SOUTHERN CALIFORNIA SEISMOGRAPHIC NETWORK A Cooperative Project of Caltech and the U.S. Geological Survey February 8, 1996 Weekly Earthquake Report for Southern California ------------------------------------------------ February 1 - 7, 1996 Prepared by: Nick Scheckel, Seismological Laboratory Debbie Wells, Seismological Laboratory (kate@bombay.gps.caltech.edu) Lucy Jones, U. S. Geological Survey 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, February 1, Universal Time (ie. GMT), to midnight Wednesday night, February 7, Universal Time. In local time, the period of coverage is from 4 p.m., January 31 to 4 p.m., February 7, Pacific Standard Time. We detected and processed 431 earthquakes during the 7-day period covered. This was a very quiet week. The total number of quakes remained the same as last week, with only 25 events of M2.0 or larger and only one above M3.0. That quake, a M3.8 near Barstow, occurred on Saturday night. It was an aftershock of the Landers earthquake (June 28, 1992 Mw7.3). We assume that it was felt by people in Barstow, but nobody in the lab received any reports to that effect. 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 ------------------------------------------------------------- 1/31 6:07 pm 35 44.9 117 38.0 2.3 8 mi. NNE of Ridgecrest 2/1 12:38 am 35 43.5 117 36.0 2.3 " 2/1 5:06 am 34 8.8 116 25.8 2.3 2 mi. NNE of Yucca Valley 2/1 6:34 am 33 3.6 116 29.9 2.2 6 mi. ESE of Julian 2/1 10:44 am 34 21.6 116 28.3 2.2 16 mi. N of Yucca Valley 2/1 8:58 pm 33 0.4 117 51.0 2.9 32 mi. SSW of Dana Point 2/1 11:23 pm 32 59.9 117 50.2 2.0 " 2/2 12:10 am 33 0.5 117 50.7 2.2 " 2/2 4:47 am 33 53.6 116 48.8 2.9 2 mi. SW of Cabazon 2/2 1:33 pm 33 39.0 119 2.4 2.6 12 mi. N of Santa Barbara Is. 2/2 2:39 pm 35 45.5 117 38.5 2.2 9 mi. N of Ridgecrest 2/3 12:48 pm 35 47.9 117 38.5 2.1 12 mi. N of Ridgecrest 2/3 1:02 pm 35 6.1 118 18.3 2.1 8 mi. WNW of Mojave 2/3 8:21 pm 32 26.1 116 16.4 2.3 26 mi. SW of Ocotillo 2/3 10:28 pm 35 1.8 116 57.7 3.8 10 mi. NNE of Barstow 2/4 9:48 am 34 1.9 118 56.0 2.3 Under Leo Carrillo State Beach 2/4 12:10 pm 34 24.4 118 38.3 2.2 4 mi. W of Valencia 2/4 12:36 pm 35 44.6 117 37.7 2.8 8 mi. NNE of Ridgecrest 2/4 9:00 pm 35 49.2 117 41.0 2.0 13 mi. N of Ridgecrest 2/5 9:01 am 33 45.1 116 6.4 2.2 6 mi. ENE of Indio 2/5 11:11 am 34 33.9 116 30.2 2.1 30 mi. N of Yucca Valley 2/5 1:13 pm 33 13.2 116 11.7 2.5 6 mi. NW of Ocotillo Wells 2/5 1:13 pm 35 48.7 117 40.8 2.1 13 mi. N of Ridgecrest 2/5 3:27 pm 33 25.3 116 22.9 2.5 11 mi. N of Borrego Springs 2/7 11:03 am 34 17.6 118 27.5 2.5 1 mi. WNW of Pacoima -------------------------------------------------------------