NetNews Usenet Archive 1992 #27/NN_1992_27.iso/spool/ca/earthqua/1359

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Subject: Caltech Weekly Earthquake Report
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Date: 19 Nov 92 23:39:47 GMT
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Organization: Geology Department, University of California, Davis
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Here is the text of the Caltech weekly report. It accompanies a postscript
map that I can't or won't re-post because it's a very big file. You can
ftp the text and map from seismo.gps.caltech.edu under successive
directories pub and ca.earthquakes.
I've edited the text lightly, but the information is unaffected.

Weekly Earthquake Report for Southern California, November 12 - 18, 1992

Kate Hutton, Seismological Laboratory ([e-mail])
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 [phone].

--------------------------------
Aftershocks of the Landers earthquake continued in the seven days to
midnight Wednesday night, November 18, PST, as they will for several
years at least. The map includes a virtually complete set of earthquakes
of M2.5 or larger, plus many smaller ones that made it through the data
processing: 440 in all.
There was not much exciting this week. The largest quake was a M3.5 near
the intersection of the Banning and San Jacinto Faults at Redlands, early
Wednesday morning. It was fairly widely felt, and there was some confusion

about whether "Caltech said" it was a Big Bear aftershock or not. This is
debatable, although we finally said that it was not, because the Redlands
area is one of fairly high activity in its own right.
Only slightly smaller (M3.4 and M3.3) were two quakes 15 minutes apart on

Friday night, both 7 mi. NE of Barstow. These were Landers aftershocks.
Table 1 lists only earthquakes of M2.3 or larger. Times are local; for
GMT, add 8 hrs. to the PST listed.

Table 1
-------
Date  Time      N Lat.   W Long.   Mag

-------------------------------------------------------------
11/12 12:16 am  34 38.2  116 31.1  2.4  27 mi. ENE of Lucerne Valley
11/12  3:08 am  35 45.4  117 36.3  2.9  9 mi. NNE of Ridgecrest
11/12  3:20 am  34 33.8  116 24.3  2.4  30 mi. N of Yucca Valley
11/12  7:44 am  35  2.5  116 58.5  2.4  10 mi. NNE of Barstow
11/12  8:26 am  34  9.6  116 24.9  2.8  3 mi. NNE of Yucca Valley
11/12  1:28 pm  33 32.3  116 39.6  2.3  1 mi. SSE of Anza
11/12  4:53 pm  34  9.6  116 26.5  2.4  2 mi. N of Yucca Valley
11/12  9:45 pm  34 33.7  115 52.7  3.0  31 mi. NNE of Twentynine Palms
11/12 10:15 pm  34  3.0  119  1.3  2.4  4 mi. W of Leo Carrillo State Beach
11/13  8:18 am  34 56.4  116 55.6  2.5  6 mi. ENE of Barstow
11/13  9:18 pm  34 22.4  116 27.2  2.5  17 mi. N of Yucca Valley
11/13  9:38 pm  34 11.3  116 25.9  2.8  4 mi. N of Yucca Valley, Felt
11/13 11:01 pm  34 58.0  116 56.3  3.4  7 mi. NE of Barstow, Felt
11/13 11:17 pm  34 58.4  116 56.4  3.3      " Felt
11/14  5:58 am  34 12.4  116 26.0  2.3  6 mi. N of Yucca Valley
11/15  2:55 am  34 56.3  116 54.2  2.7  7 mi. ENE of Barstow
11/15  9:39 am  35  1.2  116 59.8  2.5  9 mi. N of Barstow
11/15 10:50 am  34 18.5  117 41.8  2.5  3 mi. WNW of Mt. Baldy
11/15  2:04 pm  33  1.0  117 50.8  2.5  31 mi. SSW of San Clemente
11/15  7:28 pm  36  1.7  120 33.8  2.6  11 mi. NW of Parkfield
11/15  7:43 pm  34 56.5  116 42.0  2.4  18 mi. E of Barstow
11/15  8:23 pm  33 56.1  116 42.5  2.3  4 mi. ENE of Cabazon
11/16  4:23 am  33 48.4  116 42.0  2.3  4 mi. N of Idyllwild
11/16 10:12 am  34 56.9  116 56.0  2.5  6 mi. NE of Barstow
11/16  1:33 pm  34 22.6  116 27.1  2.6  17 mi. N of Yucca Valley
11/16  1:53 pm  35  1.8  116 59.1  2.3  10 mi. NNE of Barstow
11/17  1:17 am  34 59.2  116 57.0  2.4  7 mi. NNE of Barstow
11/17  7:49 am  33  6.5  116 24.0  2.4  10 mi. S of Borrego Springs
11/17  9:32 am  33 13.2  116 45.6  2.8  1 mi. S of Lake Henshaw
11/17 12:27 pm  34  9.9  116 26.0  2.5  3 mi. NNE of Yucca Valley
11/17 10:13 pm  34 30.7  116 31.2  2.9  27 mi. N of Yucca Valley
11/17 11:09 pm  34 14.2  116 47.9  2.3  3 mi. ESE of Big Bear City
11/18 12:35 am  34 25.4  116 29.1  2.3  21 mi. N of Yucca Valley
11/18  5:44 am  34 18.0  116 49.3  2.3  3 mi. NE of Big Bear City
11/18  6:10 am  34  0.5  117  6.3  3.5  5 mi. SE of Redlands
11/18 10:48 am  34  5.8  116 23.1  2.6  3 mi. ESE of Yucca Valley
11/18  1:24 pm  34 58.2  116 55.8  2.3  7 mi. NE of Barstow
11/18  5:02 pm  36  3.3  117 53.0  2.4  3 mi. E of Coso Junction
11/18  9:19 pm  34 20.7  116 26.7  2.4  15 mi. N of Yucca Valley
11/18  9:35 pm  34 38.3  116 30.5  2.3  28 mi. ENE of Lucerne Valley
------------------------------------------------------------