From : W6VIO @ W6VIO To : QUAKE Date : 921217/2120 Msgid : BN 43497@W6VIO $43497_W6VIO Subject : S. Cal Weekly Rpt 12/10 - 12/16 December 17, 1992 Weekly Earthquake Report for Southern California ------------------------------------------------ December 10 - 16, 1992 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) 356-6326. -------------------------------- This week's Report covers the time period from midnight Thursday morning, December 10, Pacific Standard Time, to midnight Wednesday night, December 16, Pacific Standard Time. Aftershocks of the Landers earthquake continue, as they will for several years at least. 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 444 in all. The phrase for the week is simply "more of the same". The largest quake was a M3.9 north of Yucca Valley on Thursday afternoon. The second largest was a M3.7 near Barstow on Saturday night. Both were Landers aftershocks. For those interested in the progress of the data processing, here is the tally: Processed Still to do --------- ----------- June 28 - 30 860 541 July 2,888 8,756 August 1,571 6,300 September 2,024 3,838 October 2,561 1,709 November 2,294 1,173 December 1,249 so far 668 so far --------- ----------- 13,447 22,985 The numbers in the "still to to" column correspond to on-line system triggers, which may contain multiple earthquakes. Taking this into account, we easily have 45,000 earthquakes for the second half of 1992. Our normal processing load for a six month period is about 5,000. The table lists the quakes that were M2.3 or larger. 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 ------------------------------------------------------------- 12/10 4:20 am 34 16.1 116 54.3 2.7 1 mi. N of town of Big Bear Lake 12/10 6:39 am 34 18.4 116 26.2 2.5 12 mi. N of Yucca Valley 12/10 8:13 am 35 0.4 116 56.8 2.3 9 mi. NNE of Barstow 12/10 10:23 am 34 9.1 116 24.8 3.4 2 mi. NE of Yucca Valley 12/10 12:35 pm 34 57.8 116 56.0 2.4 7 mi. NE of Barstow 12/10 12:47 pm 34 16.3 116 24.1 2.9 10 mi. NNE of Yucca Valley 12/10 4:04 pm 34 36.9 116 37.8 2.8 21 mi. ENE of Lucerne Valley 12/10 4:45 pm 34 22.5 116 52.4 3.0 6 mi. SE of Lucerne Valley 12/10 5:38 pm 34 16.3 116 24.1 3.9 10 mi. NNE of Yucca Valley Felt. 12/10 5:40 pm 34 16.5 116 23.9 2.9 " 12/10 5:52 pm 34 16.2 116 24.2 2.7 " 12/10 9:14 pm 34 21.3 116 56.0 2.5 6 mi. S of Lucerne Valley 12/10 11:41 pm 35 7.8 116 50.4 2.6 15 mi. S of Goldstone (dry) Lake 12/11 3:11 am 34 21.1 116 55.4 2.4 6 mi. S of Lucerne Valley 12/11 3:11 am 32 36.3 117 20.0 2.7 12 mi. SW of the I5/I8 interch., San Diego 12/11 4:13 am 33 11.5 115 33.6 2.3 4 mi. SW of Niland 12/11 4:47 am 33 11.5 115 34.0 2.9 " 12/11 4:56 am 34 59.1 116 56.8 2.7 7 mi. NNE of Barstow 12/11 7:39 am 34 21.2 116 53.8 2.7 6 mi. NNW of Big Bear City 12/11 12:00 pm 34 22.9 116 27.4 2.7 18 mi. N of Yucca Valley 12/11 12:45 pm 34 22.4 116 52.8 2.3 6 mi. SE of Lucerne Valley 12/11 1:06 pm 34 16.1 116 24.0 2.8 10 mi. NNE of Yucca Valley 12/11 1:46 pm 34 22.4 116 52.4 2.3 6 mi. SE of Lucerne Valley 12/11 4:31 pm 34 21.4 116 53.7 3.4 6 mi. SSE of Lucerne Valley Felt. 12/11 5:08 pm 34 11.2 116 47.0 2.7 6 mi. NNE of Mt. San Gorgonio 12/11 7:25 pm 33 57.2 116 23.3 2.4 6 mi. E of Desert Hot Springs 12/11 8:20 pm 35 56.4 117 40.9 2.3 16 mi. ESE of Coso Junction 12/11 9:36 pm 34 16.5 116 24.3 3.1 11 mi. NNE of Yucca Valley Felt. 12/12 12:07 am 34 22.4 116 54.3 2.7 5 mi. SSE of Lucerne Valley 12/12 6:38 am 35 0.4 116 57.8 2.7 8 mi. NNE of Barstow 12/12 7:10 am 32 59.7 117 48.0 2.3 27 mi. WSW of Oceanside 12/12 7:28 am 34 38.2 116 30.7 2.3 28 mi. ENE of Lucerne Valley 12/12 11:40 am 34 36.4 116 38.2 2.4 20 mi. ENE of Lucerne Valley 12/12 3:59 pm 34 22.2 116 52.7 2.6 6 mi. SE of Lucerne Valley 12/12 4:46 pm 34 30.9 116 31.1 2.3 27 mi. N of Yucca Valley 12/12 8:14 pm 34 58.9 116 56.8 3.7 7 mi. NE of Barstow Felt. 12/12 9:30 pm 34 0.9 116 20.6 3.1 9 mi. SE of Yucca Valley 12/12 11:15 pm 34 0.0 116 20.3 2.5 " 12/12 11:31 pm 36 25.5 117 53.6 2.6 11 mi. NNE of Olancha 12/13 3:47 am 34 21.8 116 52.4 2.3 6 mi. N of Big Bear City 12/13 3:48 am 34 56.7 116 55.8 2.4 6 mi. NE of Barstow 12/13 4:12 am 34 58.7 116 56.7 2.3 " 12/13 4:32 am 34 7.3 116 23.9 2.6 2 mi. E of Yucca Valley 12/13 6:15 am 34 21.1 116 53.8 2.3 6 mi. NNW of Big Bear City 12/13 11:14 am 34 34.6 116 35.2 2.4 22 mi. ENE of Lucerne Valley 12/13 11:15 am 34 29.2 116 31.2 2.7 25 mi. N of Yucca Valley 12/13 1:10 pm 33 58.7 116 18.8 2.9 10 mi. E of Desert Hot Springs 12/13 1:57 pm 34 17.9 116 28.1 2.3 12 mi. N of Yucca Valley 12/13 4:02 pm 34 32.6 116 33.3 2.5 23 mi. ENE of Lucerne Valley 12/13 5:15 pm 34 18.5 116 25.0 3.0 13 mi. N of Yucca Valley 12/13 5:21 pm 34 37.7 116 33.5 2.4 25 mi. ENE of Lucerne Valley 12/13 6:13 pm 34 37.8 116 35.5 2.3 " 12/13 7:23 pm 34 12.9 116 27.0 2.3 6 mi. N of Yucca Valley 12/14 1:58 am 34 57.2 116 56.6 3.2 6 mi. NE of Barstow 12/14 4:46 am 34 32.5 116 32.7 2.3 23 mi. ENE of Lucerne Valley 12/14 5:19 am 34 57.2 116 55.6 2.3 7 mi. NE of Barstow 12/14 6:08 am 34 55.7 116 42.8 2.4 17 mi. E of Barstow 12/14 9:15 am 32 33.2 115 52.3 2.3 14 mi. SSE of Ocotillo 12/14 9:35 am 34 20.2 116 54.6 2.6 5 mi. NNW of Big Bear City 12/14 9:46 am 34 20.4 116 54.7 3.0 6 mi. NNW of Big Bear City 12/14 9:57 am 34 4.2 116 23.0 2.6 4 mi. SE of Yucca Valley 12/14 11:52 am 34 58.5 116 47.9 3.2 14 mi. ENE of Barstow 12/14 1:39 pm 34 16.5 116 44.5 2.3 6 mi. E of Big Bear City 12/14 2:12 pm 34 29.8 116 30.5 2.3 26 mi. N of Yucca Valley 12/14 2:42 pm 35 0.1 116 57.0 2.4 8 mi. NNE of Barstow 12/14 2:49 pm 34 23.7 116 27.6 2.3 19 mi. N of Yucca Valley 12/14 4:52 pm 35 4.0 116 59.8 2.3 12 mi. N of Barstow 12/14 10:48 pm 34 15.7 116 44.1 3.0 6 mi. E of Big Bear City 12/15 2:17 am 34 12.9 116 50.4 2.4 3 mi. SSE of Big Bear City 12/15 6:26 am 34 58.2 116 56.5 2.3 7 mi. NE of Barstow 12/15 6:53 am 34 38.0 116 40.0 2.4 20 mi. NE of Lucerne Valley 12/15 12:07 pm 34 20.1 116 53.2 3.2 5 mi. NNW of Big Bear City 12/15 3:11 pm 34 3.1 116 23.5 2.8 5 mi. SE of Yucca Valley 12/15 4:18 pm 34 21.0 116 53.4 2.4 6 mi. NNW of Big Bear City 12/15 8:42 pm 34 1.1 116 18.7 2.4 10 mi. SE of Yucca Valley 12/15 9:18 pm 34 21.2 116 53.3 2.7 6 mi. NNW of Big Bear City 12/16 1:55 am 34 37.5 116 32.7 3.3 25 mi. ENE of Lucerne Valley 12/16 1:57 am 34 37.3 116 32.8 2.5 " 12/16 8:25 am 33 56.1 118 35.2 2.5 8 mi. SW of Santa Monica 12/16 11:58 am 34 37.3 116 34.6 2.3 24 mi. ENE of Lucerne Valley 12/16 2:03 pm 32 53.8 115 31.9 2.3 4 mi. S of Brawley 12/16 2:31 pm 34 59.4 116 57.0 3.3 8 mi. NNE of Barstow 12/16 4:07 pm 34 59.3 116 56.7 2.3 " 12/16 6:53 pm 34 38.2 116 40.0 2.5 20 mi. NE of Lucerne Valley 12/16 8:33 pm 35 40.9 117 37.2 2.3 4 mi. NNE of Ridgecrest ----- End of message 43497 from W6VIO @ W6VIO. ----- WD6CDN at W6VIO-1 [0959] =>