SOUTHERN CALIFORNIA SEISMOGRAPHIC NETWORK A Cooperative Project of Caltech and the U.S. Geological Survey June 6, 1996 Weekly Earthquake Report for Southern California ------------------------------------------------ May 30 - June 5, 1996 Prepared by: Kate Hutton, 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, May 30, Universal Time (ie. GMT), to midnight Wednesday night, June 5, Universal Time. In local time, the period of coverage is from 5 p.m., May 29, Pacific Daylight Time, to 5 p.m., June 5, Pacific Daylight Time. We detected and processed 288 earthquakes during the 7-day period covered. The relatively low seismicity of the past few weeks continued. There were only two M3+ events this week, a pair of M3.1's in the familiar Ridgecrest swarm area, 19 minutes apart very early Sunday morning. A M2.9 occurred in the Tehachapi Mountains on Monday evening. The only quake that generated inquiries, however, was a M2.6 near Yucca Valley on Tuesday evening. It was an aftershock of the 1992 Landers earthquake, Mw7.3, and was felt in Yucca Valley. 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 ------------------------------------------------------------- 5/30 2:02 am 35 44.9 117 37.4 2.3 9 mi. NNE of Ridgecrest 5/30 2:03 am 35 45.0 117 37.7 2.7 " 5/30 6:46 am 35 5.3 118 29.3 2.0 3 mi. SW of Tehachapi 5/30 3:45 pm 34 21.9 118 25.0 2.0 5 mi. N of San Fernando 5/30 4:36 pm 35 23.8 117 33.5 2.1 16 mi. SSE of Ridgecrest 5/30 8:35 pm 34 2.7 117 15.0 2.4 Under Loma Linda 5/30 8:50 pm 35 9.0 116 51.6 2.1 14 mi. S of Goldstone Lake 5/30 10:00 pm 32 59.5 117 42.7 2.3 23 mi. SW of Oceanside 5/31 3:11 am 35 45.0 117 37.5 2.4 9 mi. NNE of Ridgecrest 5/31 4:49 am 34 22.8 118 38.2 2.2 4 mi. WSW of Valencia 5/31 11:42 am 34 7.5 116 22.7 2.0 3 mi. WSW of Joshua Tree 5/31 12:23 pm 32 42.6 117 20.3 2.0 6 mi. SW of Mission Beach 5/31 4:04 pm 34 23.4 116 28.6 2.1 18 mi. N of Yucca Valley 6/1 9:53 am 35 57.9 117 39.5 2.0 17 mi. ESE of Coso Junction 6/2 1:01 am 35 44.3 117 37.4 3.1 8 mi. NNE of Ridgecrest 6/2 1:20 am 35 44.1 117 37.6 3.1 8 mi. NNE of Ridgecrest 6/2 11:54 am 34 2.8 116 50.8 2.1 3 mi. SSW of Mt. San Gorgonio 6/2 3:43 pm 34 22.3 116 27.9 2.6 17 mi. N of Yucca Valley 6/2 5:17 pm 34 59.7 116 56.7 2.1 8 mi. NNE of Barstow 6/3 3:19 am 35 46.6 117 39.2 2.1 10 mi. N of Ridgecrest 6/3 2:26 pm 36 2.9 117 53.4 2.4 3 mi. E of Coso Junction 6/3 6:57 pm 34 36.7 116 34.8 2.0 23 mi. ENE of Lucerne Valley 6/3 7:26 pm 34 9.1 116 25.8 2.0 2 mi. NNE of Yucca Valley 6/3 10:52 pm 35 22.4 118 31.3 2.9 17 mi. NNW of Tehachapi 6/4 1:59 am 34 1.5 118 59.9 2.2 3 mi. WSW of Leo Carrillo State Beach 6/4 8:30 am 35 47.3 117 40.3 2.5 11 mi. N of Ridgecrest 6/4 1:15 pm 33 8.6 115 36.6 2.0 2 mi. SE of Obsidian Butte 6/4 1:19 pm 33 8.6 115 36.7 2.1 " 6/4 8:04 pm 34 1.0 118 57.8 2.0 2 mi. SW of Leo Carrillo State Beach 6/4 8:09 pm 35 2.1 116 59.9 2.4 10 mi. N of Barstow 6/4 11:07 pm 34 7.3 116 23.4 2.6 3 mi. E of Yucca Valley FELT 6/5 8:50 am 33 9.1 115 37.0 2.1 1 mi. SE of Obsidian Butte 6/5 12:10 pm 32 50.3 115 43.5 2.4 10 mi. WNW of El Centro 6/5 3:05 pm 33 19.0 118 18.6 2.2 1 mi. SSE of Avalon, Catalina Island -------------------------------------------------------------