November 3, 1994 Weekly Earthquake Report for Southern California ------------------------------------------------ October 27 - November 2, 1994 Prepared by: Kate Hutton, Seismological Laboratory (kate@bombay.gps.caltech.edu) Lucy Jones, U.S. Geological Survey California Institute of Technology This document is a commentary on current seismic activity. The earthquakes discussed have been detected and processed automatically. All epicenters and magnitudes have been reviewed to exclude obvious blunders; however, they must still be considered preliminary. 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, October 27, Pacific Daylight Time, to midnight Wednesday night, November 2, Pacific Standard Time. We recorded 330 earthquakes of M1.0 or larger this week. We were back to boring seismicity this week. No quakes were reported felt by the public. The largest event was a M3.3 Landers aftershock on Sunday afternoon, 17 miles N of Yucca Valley. It was the only M3 or larger event. Landers and Northridge aftershocks continue as expected, along with the usual background seismic activity. 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 ------------------------------------------------------------- 10/27 4:22 am 36 22.8 117 57.6 2.0 7 mi. NNE of Olancha 10/27 8:54 am 32 37.2 115 54.1 2.2 9 mi. SSE of Ocotillo 10/27 9:23 am 35 40.8 117 36.7 2.1 5 mi. NE of Ridgecrest 10/27 12:13 pm 34 47.6 116 17.8 2.2 34 mi. SSW of Baker 10/27 12:54 pm 34 20.9 116 27.4 2.2 15 mi. N of Yucca Valley 10/27 3:37 pm 35 30.6 117 29.5 2.1 12 mi. SE of Ridgecrest 10/27 3:54 pm 34 8.5 116 24.3 2.1 2 mi. NE of Yucca Valley 10/27 7:13 pm 34 2.3 117 15.0 2.0 Loma Linda, 3 mi. ESE of the I10/I215 interchange 10/27 10:46 pm 34 32.3 120 31.6 2.1 5 mi. NNW of Pt. Conception 10/28 1:03 am 34 18.6 118 27.8 2.1 2 mi. NW of San Fernando 10/28 1:03 am 34 19.2 118 27.8 2.3 3 mi. NNW of San Fernando 10/28 6:50 am 34 20.9 116 28.0 2.2 15 mi. N of Yucca Valley 10/28 6:59 am 34 21.4 116 28.0 2.1 " 10/28 7:01 am 34 21.0 116 28.3 2.0 " 10/28 7:19 am 33 59.6 117 0.5 2.3 4 mi. NNW of Beaumont 10/28 9:40 am 34 35.7 116 40.6 2.0 18 mi. NE of Lucerne Valley 10/28 11:51 am 35 30.7 117 29.5 2.4 12 mi. SE of Ridgecrest 10/28 4:01 pm 34 33.8 116 31.3 2.0 25 mi. ENE of Lucerne Valley 10/28 4:56 pm 34 35.9 116 37.5 2.2 21 mi. ENE of Lucerne Valley 10/28 6:52 pm 33 28.6 116 27.9 2.1 13 mi. ESE of Anza 10/28 8:48 pm 35 30.5 117 29.5 2.7 12 mi. SE of Ridgecrest 10/28 11:44 pm 34 21.0 116 28.1 2.4 16 mi. N of Yucca Valley 10/29 2:37 am 34 19.8 118 35.5 2.1 4 mi. SW of Newhall 10/29 5:00 am 34 0.9 117 13.6 2.1 3 mi. SW of Redlands 10/29 10:14 am 34 23.2 116 27.8 2.2 18 mi. N of Yucca Valley 10/29 1:09 pm 32 19.2 115 12.9 2.9 29 mi. SE of Calexico 10/29 3:42 pm 34 22.1 118 36.4 2.0 3 mi. SSW of Magic Mtn. 10/29 8:37 pm 36 4.5 117 51.5 2.1 5 mi. ENE of Coso Junction 10/30 7:32 am 34 18.9 118 33.1 2.3 4 mi. SSW of Newhall 10/30 12:07 pm 36 0.7 117 49.1 2.1 7 mi. ESE of Coso Junction 10/30 4:45 pm 34 22.4 116 27.3 3.3 17 mi. N of Yucca Valley 10/30 4:48 pm 34 22.5 116 27.4 2.2 " 10/30 5:28 pm 33 57.0 116 39.6 2.7 7 mi. ENE of Cabazon 10/30 6:24 pm 35 40.0 117 40.9 2.3 3 mi. NNW of Ridgecrest 10/31 11:49 pm 34 22.6 116 27.2 2.0 17 mi. N of Yucca Valley 10/31 12:42 am 34 37.5 116 38.6 2.1 21 mi. NE of Lucerne Valley 10/31 12:47 am 34 28.4 116 30.4 2.3 24 mi. N of Yucca Valley 10/31 5:03 am 33 41.0 116 47.9 2.4 6 mi. SW of Idyllwild 10/31 2:17 pm 33 20.7 116 47.0 2.3 4 mi. E of Palomar Observatory 10/31 4:37 pm 34 36.6 116 39.5 2.1 19 mi. NE of Lucerne Valley 10/31 8:22 pm 36 0.6 117 49.2 2.1 7 mi. ESE of Coso Junction 10/31 9:44 pm 34 26.4 116 28.1 2.0 22 mi. N of Yucca Valley 11/1 11:54 pm 34 26.3 120 45.3 2.2 11 mi. SSW of Pt. Arguello 11/1 2:07 am 36 0.1 117 47.5 2.1 9 mi. ESE of Coso Junction 11/1 2:12 am 34 13.0 118 28.2 2.9 3 mi. ESE of Northridge 11/1 4:20 am 32 19.3 115 6.2 2.5 33 mi. SE of Calexico 11/1 7:01 am 34 17.2 118 25.2 2.0 1 mi. ENE of San Fernando 11/1 8:31 am 35 50.5 117 47.2 2.0 16 mi. NNW of Ridgecrest 11/1 11:22 am 34 59.6 116 56.8 2.6 8 mi. NNE of Barstow 11/2 3:44 am 34 12.6 119 28.2 2.3 12 mi. NNE of Santa Cruz Is. 11/2 7:15 am 34 55.2 118 41.6 2.0 12 mi. NE of Gorman 11/2 9:43 am 33 56.0 116 21.5 2.2 8 mi. ESE of Desert Hot Springs 11/2 10:35 am 32 54.3 119 7.4 2.9 31 mi. SE of San Nicolas Is. 11/2 11:13 am 34 33.8 116 30.4 2.1 31 mi. N of Yucca Valley 11/2 12:22 pm 34 22.4 116 27.9 2.1 17 mi. N of Yucca Valley 11/2 4:34 pm 34 49.5 116 41.5 2.2 19 mi. ESE of Barstow 11/2 7:27 pm 34 14.3 118 39.2 2.0 3 mi. NW of Canoga Park ------------------------------------------------------------- Figure 1. A map of southern California showing the earthquakes recorded during the past week by the Caltech/USGS Seismic Network. Major faults are marked, as well as the metropolitan areas of Los Angeles (L.A.), Palm Springs (P.S.), San Diego (S.D.), and Santa Barbara (S.B.). The circles denote the earthquakes, the size of the circle indicating the magnitude.