From: cowen@jade.ucdavis.edu
Newsgroups: ca.earthquakes,sci.geo.geology
Subject: Caltech Weekly Report, 15 October
Date: 15 Oct 92 23:41:32 GMT
Reply-To: cowen@jade.ucdavis.edu
Followup-To: ca.earthquakes
Organization: Geology Department, University of California, Davis

This is the text of the Caltech report. It is accompanied by a postcript
map that I can't or won't repost because it's such a big file. You can
ftp the text and the map from seismo.gps.caltech.edu under successive
directories pub and ca.earthquakes. I have edited the text lightly, but
all information is preserved.

Weekly Earthquake Report for Southern California, October 8 - 14, 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 7 days to midnight Wednesday night, 
October 14, PDT. Aftershocks of the Landers earthquake continue, 
as they will for several years at least. The map includes a nearly 
complete set of earthquakes of M2.5 or larger, plus many smaller 
ones that happen to have made it through the data processing. 
There are 482 in all.

Landers and Big Bear aftershocks continue to die off as expected. 
Again, this week's seismicity looks fairly unremarkable. Most of 
the large events were concentrated in the Barstow to Ridgecrest/
Coso area. The Barstow quakes are considered aftershocks of the 
Landers Mw7.4, while the Cosoquakes are not, although this is 
somewhat a matter of semantic convenience. The week's largest, 
M4.3 on Sunday morning, was felt in the general vicinity of Barstow.

Table 1 lists only earthquakes of M2.5 or larger. Times are local; 
for GMT, add 7 hrs. to the PDT listed.

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

-------------------------------------------------------------
10/8  12:40 am  34 58.7  116 56.8  2.8  7 mi. NE of Barstow
10/8  10:44 am  36  5.1  117 40.6  3.6  15 mi. ESE of S end of Haiwee Reservoir
10/8  11:10 am  36  5.2  117 40.5  2.9  "
10/8  10:22 pm  34 55.6  116 55.0  2.9  6 mi. ENE of Barstow
10/8  10:57 pm  34 16.3  116 46.3  2.6  4 mi. E of Big Bear City
10/9   1:48 am  34 25.0  116 28.2  2.5  20 mi. N of Yucca Valley
10/9  10:29 am  35  5.7  116 31.1  2.9  27 mi. SE of Goldstone (dry) Lake
10/10  7:38 pm  34 30.7  116 45.0  2.5  12 mi. ENE of Lucerne Valley
10/10  7:51 pm  33  9.5  115 39.3  2.7  8 mi. NNW of Westmorland
10/10  8:57 pm  35 59.7  117 52.3  3.0  5 mi. SE of Coso Junction
10/11  5:35 am  34 56.8  116 47.7  2.5  13 mi. ENE of Barstow
10/11  5:38 am  34 56.7  116 47.9  4.4     "	Felt
10/11  5:47 am  34 56.5  116 47.9  2.5     "
10/11  5:53 am  34 57.0  116 47.6  2.5     "
10/11  6:59 am  35  4.3  116 59.8  2.5  12 mi. N of Barstow
10/11  7: 5 am  35  4.4  116 60.0  2.5  	"
10/11  7:16 am  35  0.2  116 57.0  2.8  8 mi. NNE of Barstow
10/11  9:41 am  34 40.1  116 41.5  2.5  21 mi. NE of Lucerne Valley
10/11  3:34 pm  34 56.6  116 48.0  3.5  13 mi. ENE of Barstow
10/11  5:17 pm  34 26.4  116 27.8  3.0  22 mi. N of Yucca Valley
10/11  5:17 pm  34 56.5  116 48.3  3.1  12 mi. ENE of Barstow
10/11  8:56 pm  34 20.8  116 28.0  2.6  15 mi. N of Yucca Valley
10/11 11:50 pm  34 56.6  116 47.9  2.6  13 mi. ENE of Barstow
10/12  7:25 am  35  0.9  116 57.6  2.8  9 mi. NNE of Barstow
10/12  3:25 pm  34 31.8  116 31.4  2.5  28 mi. N of Yucca Valley
10/12  3:27 pm  34 29.9  116 32.1  2.7  26 mi. N of Yucca Valley
10/12  5:14 pm  35 31.3  117 28.3  3.5  13 mi. ESE of Ridgecrest
10/12  5:15 pm  35 31.0  117 28.0  3.5  	"
10/12  9: 2 pm  34  9.2  116 24.5  2.5  3 mi. NE of Yucca Valley
10/13  1: 7 am  34 34.7  116 19.2  3.1  32 mi. NNE of Yucca Valley
10/13  1:40 am  34 37.8  116 36.6  2.6  22 mi. NE of Lucerne Valley
10/13  6: 8 am  34 37.9  116 30.2  2.7  28 mi. ENE of Lucerne Valley
10/13  8:57 am  34 37.5  116 40.1  3.2  20 mi. NE of Lucerne Valley
10/13  1:28 pm  33 59.9  116 19.6  2.8  10 mi. SE of Yucca Valley
10/13  5:18 pm  35  4.3  116 59.8  2.8  12 mi. N of Barstow
10/13  6:54 pm  35  4.6  117  0.2  3.3  	"
10/13  9:21 pm  35  0.5  116 57.9  2.5  8 mi. NNE of Barstow
10/13  9:32 pm  34  0.2  116 20.9  2.9  9 mi. SE of Yucca Valley
10/14  2:47 am  34 37.9  116 39.7  2.8  20 mi. NE of Lucerne Valley
10/14  4: 9 pm  34 14.5  116 44.5  2.6  6 mi. ESE of Big Bear City
10/14  4: 9 pm  34 29.9  116 30.7  2.8  26 mi. N of Yucca Valley
10/14  6:40 pm  34 55.8  116 54.8  2.6  6 mi. ENE of Barstow
-------------------------------------------------------------