November 17, 1994 Weekly Earthquake Report for Southern California ------------------------------------------------ November 10 - 16, 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, November 10, Pacific Standard Time, to midnight Wednesday night, November 16, Pacific Standard Time. We recorded 318 earthquakes of M1.0 or larger this week. The total number of quakes is approximately average for the past few months. As you can see by looking at the map, both the Northridge and the Landers aftershock sequences are still clearly present, but they no longer dominate. This week, there were three quakes of M3 or larger. The largest one happened to be a Landers aftershock, but the other two were not. The largest, an M3.4, occurred in the desert north of Yucca Valley, early Saturday morning. A quake this size could certainly have been felt, but we got no inquiries. The other two M3's were: a M3.0 near Bakersfield on Thursday afternoon, and a M3.2 near Redlands on Tuesday evening. We did get public inquiries on both of these. Otherwise, there was nothing outstanding in the week's 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 ------------------------------------------------------------- 11/10 1:51 am 34 1.8 117 30.5 2.1 3 mi. SE of the I10/I15 interchange 11/10 2:13 am 34 1.8 117 30.5 2.2 " 11/10 12:19 pm 34 15.0 118 34.3 2.0 2 mi. WNW of Northridge 11/10 1:24 pm 33 41.6 116 48.5 2.0 6 mi. WSW of Idyllwild 11/10 7:35 pm 36 4.6 117 51.7 2.1 5 mi. ENE of Coso Junction 11/10 11:52 pm 32 40.2 115 54.3 2.4 6 mi. SE of Ocotillo 11/11 7:28 am 34 2.0 116 19.5 2.0 8 mi. SE of Yucca Valley 11/11 1:30 pm 35 7.3 118 56.9 3.0 7 mi. N of the I5/99 interchange, FELT in Bakers- field 11/11 3:06 pm 34 38.1 116 39.9 2.0 20 mi. NE of Lucerne Valley 11/11 4:58 pm 34 18.0 118 33.2 2.0 4 mi. NNW of Northridge 11/11 6:59 pm 34 11.3 117 5.8 2.6 1 mi. SSE of Running Springs 11/12 12:55 am 34 16.1 118 37.9 2.7 5 mi. NNW of Canoga Park 11/12 2:03 am 36 7.5 117 38.6 2.6 17 mi. SW of Panamint Springs 11/12 3:48 am 34 21.6 116 27.5 2.2 16 mi. N of Yucca Valley 11/12 3:50 am 34 21.7 116 27.5 3.4 " 11/12 4:19 am 34 21.5 116 27.9 2.2 " 11/12 6:11 am 34 21.8 116 27.3 2.0 " 11/12 7:16 am 33 18.8 115 42.9 2.3 2 mi. SSE of Bombay Beach 11/12 9:16 am 34 3.3 117 28.0 2.0 4 mi. SSW of Fontana 11/12 10:00 am 35 52.4 117 57.7 2.2 11 mi. S of Coso Junction 11/12 12:39 pm 34 17.4 118 30.3 2.1 3 mi. NNE of Northridge 11/12 9:38 pm 34 15.3 118 27.9 2.1 2 mi. SW of San Fernando 11/13 12:33 am 34 18.7 118 28.5 2.0 2 mi. NW of San Fernando 11/13 1:41 am 36 4.4 117 50.9 2.2 5 mi. ENE of Coso Junction 11/13 2:03 am 34 9.5 117 43.2 2.0 3 mi. N of Claremont Colleges 11/13 7:40 am 33 41.2 116 43.8 2.2 4 mi. SSW of Idyllwild 11/13 2:02 pm 36 7.1 117 51.1 2.4 5 mi. ESE of Haiwee Reservoir 11/13 4:16 pm 36 6.3 117 41.6 2.0 14 mi. E of Haiwee Reservoir 11/13 7:47 pm 34 19.9 116 27.7 2.5 14 mi. N of Yucca Valley 11/13 10:22 pm 33 37.4 116 49.6 2.2 10 mi. SW of Idyllwild 11/14 12:44 am 34 22.0 116 28.1 2.2 17 mi. N of Yucca Valley 11/14 4:35 am 33 35.5 118 24.8 2.2 10 mi. SW of Pt. Fermin, San Pedro 11/14 1:23 pm 34 21.4 116 28.4 2.1 16 mi. N of Yucca Valley 11/14 4:09 pm 34 28.2 116 27.7 2.1 24 mi. N of Yucca Valley 11/14 11:40 pm 33 59.3 116 57.9 2.4 4 mi. N of Beaumont 11/15 12:30 am 33 46.7 118 8.1 2.1 1 mi. ENE of downtown Long Beach 11/15 2:45 am 34 27.9 119 14.0 2.6 1 mi. NNE of Ojai 11/15 2:22 pm 34 27.4 116 28.2 2.2 23 mi. N of Yucca Valley 11/15 4:27 pm 33 59.6 118 46.7 2.5 1 mi. ESE of Pt. Dume 11/15 6:52 pm 34 4.3 117 11.2 3.2 1 mi. NNW of Redlands; FELT 11/16 4:10 am 36 0.6 117 48.7 2.1 7 mi. ESE of Coso Junction 11/16 4:57 am 36 10.1 120 5.6 2.6 15 mi. E of Coalinga 11/16 6:26 am 34 32.4 120 49.4 2.5 10 mi. WSW of Pt. Arguello 11/16 7:02 am 34 18.3 118 28.7 2.0 2 mi. NW of San Fernando 11/16 8:49 am 34 15.0 116 26.3 2.2 9 mi. N of Yucca Valley 11/16 10:11 am 36 34.9 119 25.9 2.5 19 mi. NNW of Visalia 11/16 11:18 am 33 38.6 116 42.7 2.3 6 mi. NNW of Anza ------------------------------------------------------------- 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.