November 23, 1993 Weekly Earthquake Report for Southern California ------------------------------------------------ November 18 - 22, 1993 Prepared by: Helen Qian, 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 18, Pacific Standard Time, to midnight Wednesday night, November 22, Pacific Standard Time. This is a shorter week due to the upcoming Thanksgiving holiday. 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 216 this time. This is yet another dull week. Nothing reached magnitude 3 in our reporting area. Not surprisingly, we didn't get any public inquiries. 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 8 hrs, to the Pacific Standard Time listed. Table 1 ------- Date Time N Lat. W Long. Mag ------------------------------------------------------------- 11/18 3:29 am 33 44.4 117 30.6 2.1 9 mi. SSE of Corona 11/18 3:29 am 34 14.8 116 51.7 2.1 1 mi. SSW of Big Bear City 11/18 4:57 am 34 9.2 116 24.9 2.0 2 mi. NE of Yucca Valley 11/18 10:59 am 32 41.7 117 6.9 2.0 6 mi. SE of the I5/I8 interch., San Diego 11/18 11:16 am 34 2.0 116 19.5 2.7 8 mi. SE of Yucca Valley 11/18 12:52 pm 34 10.0 116 26.0 2.0 3 mi. N of Yucca Valley 11/18 1:18 pm 34 9.4 116 26.0 2.3 2 mi. NNE of Yucca Valley 11/18 2:41 pm 34 8.6 117 35.4 2.3 5 mi. NNW of the I10/I15 interchange 11/18 3:50 pm 34 25.6 116 32.2 2.1 21 mi. NNW of Yucca Valley 11/18 5:12 pm 33 45.9 116 59.6 2.0 1 mi. NW of Hemet 11/18 6:32 pm 36 4.2 119 45.9 2.3 31 mi. SW of Visalia 11/18 6:37 pm 36 4.1 119 47.3 2.8 32 mi. WSW of Visalia 11/19 12:59 am 34 7.6 117 0.3 2.4 7 mi. SE of Running Springs 11/19 8:21 am 34 12.4 116 26.0 2.1 6 mi. N of Yucca Valley 11/19 8:27 am 35 24.0 119 29.0 2.1 17 mi. N of Taft 11/19 9:53 am 34 12.7 116 25.9 2.0 6 mi. N of Yucca Valley 11/19 10:18 am 34 12.7 116 25.9 2.1 6 mi. N of Yucca Valley 11/19 7:27 pm 33 57.0 116 18.8 2.8 10 mi. E of Desert Hot Springs 11/19 7:42 pm 34 23.0 116 27.2 2.3 18 mi. N of Yucca Valley 11/20 3:47 am 34 23.4 116 27.8 2.3 18 mi. N of Yucca Valley 11/20 4:06 am 36 16.7 119 40.3 2.1 21 mi. W of Visalia 11/20 4:22 am 34 28.6 116 45.1 2.1 11 mi. ENE of Lucerne Valley 11/20 5:39 am 33 55.8 116 18.5 2.0 11 mi. E of Desert Hot Springs 11/20 7:46 am 34 28.8 118 26.8 2.0 8 mi. NNE of Newhall 11/20 10:26 am 35 18.4 118 35.9 2.1 14 mi. NW of Tehachapi 11/20 5:12 pm 34 2.8 118 54.7 2.2 1 mi. E of Leo Carrillo State Beach 11/20 10:51 pm 32 42.0 118 6.9 2.0 15 mi. ESE of SE tip of San Clemente Is. 11/20 11:46 pm 33 29.8 116 27.9 2.2 12 mi. ESE of Anza 11/21 12:50 am 34 4.0 116 21.6 2.1 6 mi. SE of Yucca Valley 11/21 9:49 am 34 25.8 116 29.6 2.0 21 mi. N of Yucca Valley 11/21 1:18 pm 34 12.8 116 25.9 2.0 6 mi. N of Yucca Valley 11/21 2:01 pm 34 19.3 116 28.7 2.2 14 mi. N of Yucca Valley 11/21 6:09 pm 35 57.4 115 37.1 2.3 36 mi. E of Shoshone 11/21 6:20 pm 34 58.9 116 58.6 2.1 6 mi. NNE of Barstow 11/21 7:23 pm 32 40.1 115 54.7 2.2 6 mi. SE of Ocotillo 11/21 8:28 pm 34 33.2 116 33.2 2.1 23 mi. ENE of Lucerne Valley 11/22 12:54 am 34 16.3 116 54.1 2.2 2 mi. NNE of town of Big Bear Lake 11/22 7:36 am 34 10.5 116 26.2 2.5 3 mi. N of Yucca Valley 11/22 7:58 am 34 10.2 116 26.2 2.4 3 mi. N of Yucca Valley 11/22 8:55 am 34 37.3 116 36.6 2.0 22 mi. ENE of Lucerne Valley 11/22 11:59 am 34 35.2 116 34.6 2.0 23 mi. ENE of Lucerne Valley 11/22 2:04 pm 34 15.9 116 23.7 2.2 10 mi. NNE of Yucca Valley 11/22 8:09 pm 34 14.4 116 25.5 2.7 8 mi. N of Yucca Valley ------------------------------------------------------------- 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.