November 11, 1993 Weekly Earthquake Report for Southern California ------------------------------------------------ November 4 - 10, 1993 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 4, Pacific Standard Time, to midnight Wednesday night, November 10, Pacific Standard Time. The map includes a virtually complete set of earthquakes of M2.0 or larger, plus many smaller ones that happen to have made it through the data processing. There are 293 this time. It was a fairly uneventful week. The largest quake was a M3.3 Landers aftershock on last Thursday afternoon. There was an Ojai (M3.2) quake felt on Sunday afternoon, a Redlands quake (M2.9) was felt on Tuesday evening, and a Yucca Valley quake (M2.7) was felt on Wednesday afternoon. The table lists the quakes that were M2.0 or larger in the central part of the coverage area. Only M2.5 and larger events are listed for south of the U.S./Mexico border, and for the Coalinga/Parkfield area. For more information on the latter, see the Northern California Report issued by the U.S.G.S. in Menlo Park. Times are local times; if you want Greenwich Mean Time, add 7 hrs. to the Pacific Daylight Time listed, or 8 hrs, to the Pacific Standard Time. Table 1 ------- Date Time N Lat. W Long. Mag ------------------------------------------------------------- 11/4 12:11 am 32 4.9 115 40.6 2.6 41 mi. SSW of Calexico 11/4 6:27 am 36 11.5 120 10.3 2.6 11 mi. ENE of Coalinga 11/4 9:36 am 34 37.1 116 29.5 2.2 28 mi. ENE of Lucerne Valley 11/4 9:42 am 34 9.3 116 24.7 2.2 3 mi. NE of Yucca Valley 11/4 11:07 am 34 22.1 116 27.7 2.1 17 mi. N of Yucca Valley 11/4 1:38 pm 34 58.8 116 58.7 2.2 6 mi. NNE of Barstow 11/4 3:15 pm 34 37.3 116 39.7 3.3 20 mi. NE of Lucerne Valley 11/4 11:18 pm 33 57.7 116 51.8 2.0 2 mi. NNE of Banning 11/4 11:35 pm 34 24.7 116 28.1 2.0 20 mi. N of Yucca Valley 11/5 3:33 am 35 4.7 119 6.6 2.1 9 mi. WNW of the I5/99 interchange 11/5 7:42 am 34 37.3 116 39.7 2.5 20 mi. NE of Lucerne Valley 11/5 10:11 am 32 44.5 116 0.1 2.1 Under Ocotillo 11/5 10:28 am 34 25.0 120 51.1 2.0 16 mi. SW of Pt. Arguello 11/5 11:28 am 33 59.7 116 49.1 2.4 5 mi. NNW of Cabazon 11/5 11:37 am 34 25.4 116 27.3 2.0 21 mi. N of Yucca Valley 11/5 12:32 pm 34 9.1 116 24.7 2.1 2 mi. NE of Yucca Valley 11/5 12:36 pm 34 9.1 116 24.7 2.1 " 11/5 2:48 pm 34 23.7 116 27.6 2.0 19 mi. N of Yucca Valley 11/6 6:25 am 34 16.4 116 49.8 2.4 1 mi. ENE of Big Bear City 11/6 11:15 am 34 13.3 116 45.3 2.0 6 mi. ESE of Big Bear City 11/6 8:14 pm 34 10.6 116 26.2 2.2 4 mi. N of Yucca Valley 11/6 10:04 pm 32 50.5 116 20.3 2.2 22 mi. SE of Julian 11/7 2:05 am 34 33.4 116 32.8 2.0 24 mi. ENE of Lucerne Valley 11/7 10:56 am 34 56.6 116 46.8 2.2 14 mi. ENE of Barstow 11/7 1:39 pm 34 14.3 116 48.5 2.2 3 mi. SE of Big Bear City 11/7 1:43 pm 34 33.1 119 9.5 3.2 8 mi. NE of Ojai; FELT 11/7 9:28 pm 33 31.4 116 34.5 2.5 5 mi. ESE of Anza 11/8 12:04 am 36 28.0 120 21.6 2.8 22 mi. N of Coalinga 11/8 4:37 am 34 5.7 116 53.8 2.3 4 mi. W of Mt. San Gorgonio 11/8 8:08 am 34 12.1 116 26.0 2.0 5 mi. N of Yucca Valley 11/8 11:03 am 35 1.1 116 58.1 2.1 9 mi. NNE of Barstow 11/8 3:11 pm 34 21.1 116 28.0 2.1 16 mi. N of Yucca Valley 11/8 4:57 pm 36 8.8 118 1.7 2.0 4 mi. W of south end of Haiwee Reservoir 11/8 9:48 pm 34 17.6 116 45.2 2.1 6 mi. ENE of Big Bear City 11/8 10:43 pm 35 1.3 116 58.3 2.7 9 mi. NNE of Barstow 11/9 2:00 am 34 33.5 116 33.3 2.8 23 mi. ENE of Lucerne Valley 11/9 5:05 pm 36 16.4 119 40.7 2.2 21 mi. W of Visalia 11/9 7:47 pm 34 0.7 117 13.4 2.9 3 mi. SW of Redlands; FELT 11/9 8:10 pm 34 8.6 116 52.4 2.2 4 mi. NW of Mt. San Gorgonio 11/9 8:54 pm 36 9.1 118 1.9 2.5 4 mi. WNW of south end of Haiwee Reservoir 11/9 10:46 pm 33 45.3 118 10.8 2.0 1 mi. SW of downtown Long Beach 11/9 10:49 pm 35 48.8 116 46.8 3.2 29 mi. SE of Telescope Peak, Panamint Range 11/9 11:02 pm 34 29.0 116 30.1 2.4 25 mi. N of Yucca Valley 11/9 11:34 pm 33 20.8 116 19.7 2.0 6 mi. NNE of Borrego Springs 11/10 5:17 am 34 37.6 116 37.6 2.7 22 mi. NE of Lucerne Valley 11/10 1:27 pm 34 10.9 116 26.4 2.7 4 mi. N of Yucca Valley; FELT 11/10 1:28 pm 34 27.1 116 30.3 2.1 23 mi. N of Yucca Valley 11/10 1:29 pm 34 6.2 116 59.8 2.2 9 mi. SE of Running Springs 11/10 3:02 pm 32 40.3 117 44.2 2.1 30 mi. WSW of La Jolla 11/10 3:08 pm 34 38.5 116 32.1 2.0 27 mi. ENE of Lucerne Valley 11/10 7:00 pm 33 50.3 118 15.2 2.0 2 mi. SE of the I110/I405 interchange ------------------------------------------------------------- Figure. 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.