From: cowen@jade.ucdavis.edu
Newsgroups: ca.earthquakes,sci.geo.geology
Subject: Weekly Caltech Report, 3 August
Date: 3 Sep 92 23:23:08 GMT
Reply-To: cowen@jade.ucdavis.edu
Followup-To: ca.earthquakes
Organization: Geology Department, University of California, Davis

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 very lightly, but the information is unaffected.

Weekly Earthquake Report for Southern California, 
August 27 - September 3, 1992
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, September 
3, Pacific Daylight Time. Aftershocks of the Landers earthquake continue, 
as they will for several months at least. The activity is still so high that
we cannot keep up with the data processing. 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 system. There are 193 in all.
"More of the same" might be the best description of this week's seismicity.
The largest quake this week was a M4.2 early Monday morning, 23 miles N of

Yucca Valley. As it was last week, the emphasis seems to be on the northern

part of the Landers rupture zone, along with the Big Bear area.
Also felt was the M3.4 in the Baldwin Hills in the wee hours of 
Sunday morning, which is probably associated with the northern Newport-
Inglewood fault zone, a common enough source of small earthquakes.
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

	-------------------------------------------------------------
         8/27  8:23 am  34 32.7  116 32.1  2.7  24 mi. ENE of Lucerne Valley
         8/27  8:23 am  34 29.0  116 36.6  2.7  20 mi. NE of Big Bear City
         8/27 11:14 am  34 32.9  116 32.8  2.5  23 mi. ENE of Lucerne Valley
         8/27  7:58 pm  35  1.5  116 58.6  3.0  9 mi. NNE of Barstow
         8/27  8:20 pm  34 16.4  116 46.3  3.1  4 mi. E of Big Bear City
         8/27  9:56 pm  34  0.5  116 47.0  2.6  6 mi. N of Cabazon
         8/27 10:19 pm  34 37.3  116 40.3  2.8  19 mi. NE of Lucerne Valley
         8/27 11:24 pm  34 36.3  116 38.1  3.1  20 mi. ENE of Lucerne Valley
         8/28  1:29 am  34 56.3  116 50.1  2.7  11 mi. ENE of Barstow
         8/28  2:35 am  34 36.1  116 37.1  2.8  21 mi. ENE of Lucerne Valley
         8/28  3:04 am  34 36.2  116 38.2  2.9  20 mi. ENE of Lucerne Valley
         8/28  3:50 am  34  9.6  116 25.6  2.6  3 mi. NNE of Yucca Valley
         8/28  4:50 am  34  7.0  116 59.3  2.7  9 mi. SE of Running Springs
         8/28  4:50 am  34  7.3  116 58.8  3.7  9 mi. SSW of town of Big 
Bear Lake; Felt
         8/28  5:46 am  34 14.8  116 25.8  2.6  8 mi. N of Yucca Valley
         8/28  6:26 am  34 25.7  116 31.3  2.9  21 mi. NNW of Yucca Valley
         8/28  6:44 am  34 37.5  116 39.0  2.5  20 mi. NE of Lucerne Valley
         8/28  9:42 am  35  1.3  116 57.9  3.0  9 mi. NNE of Barstow
         8/28 11:49 am  34 35.2  116 36.9  2.9  21 mi. ENE of Lucerne Valley
         8/28 12:05 pm  34 37.7  116 33.2  3.1  25 mi. ENE of Lucerne Valley
         8/28 12:59 pm  34  1.0  116 20.9  2.6  8 mi. SE of Yucca Valley
         8/28  1:25 pm  36  3.7  117 35.0  2.8  20 mi. SSW of Panamint Springs
         8/28  6:16 pm  34 59.0  116 57.3  2.6  7 mi. NNE of Barstow
         8/28  8:12 pm  35 22.8  118 42.7  2.5  13 mi. NNE of Arvin
         8/29  1:07 am  34  7.5  116 23.7  2.5  2 mi. E of Yucca Valley
         8/29  1:09 am  35  5.5  116 59.6  2.7  14 mi. N of Barstow
         8/29  2:42 am  34 36.0  116 37.9  2.6  20 mi. ENE of Lucerne Valley
         8/29  4:43 am  34  6.7  116 55.1  2.9  5 mi. W of Mt. San Gorgonio
         8/29  6:01 am  34  6.8  116 55.2  2.5  	"
         8/29  6:40 am  34  6.7  116 59.6  2.8  9 mi. SE of Running Springs
         8/29  7:32 am  34 22.7  116 28.3  3.3  18 mi. N of Yucca Valley
         8/29  7:56 am  35  1.0  116 58.0  2.5  9 mi. NNE of Barstow
         8/29  3:04 pm  35 19.8  117 37.8  2.8  20 mi. S of Ridgecrest
         8/29  3:04 pm  35 19.7  117 38.0  2.7  	"
         8/29  3:04 pm  34  9.2  116 52.5  2.5  4 mi. NW of Mt. San Gorgonio
         8/29  4:47 pm  34 35.8  116 36.9  2.9  21 mi. ENE of Lucerne Valley
         8/29  7:48 pm  34 14.7  116 26.0  2.5  8 mi. N of Yucca Valley
         8/30  1:15 am  34  0.4  118 22.1  3.4  Under Baldwin Hills; Felt in
Hollywood
         8/30  4:06 am  34 19.5  116 40.9  2.9  10 mi. ENE of Big Bear City
         8/30  8:11 am  34  6.8  116 59.5  2.5  9 mi. SE of Running Springs
         8/30 10:15 am  34 37.4  116 32.0  2.8  26 mi. ENE of Lucerne Valley
         8/30 10:20 am  34 28.6  116 30.6  2.9  25 mi. N of Yucca Valley
         8/30  1:31 pm  34 16.8  116 27.0  2.8  11 mi. N of Yucca Valley
         8/30  2:17 pm  34 33.5  116 32.4  2.9  24 mi. ENE of Lucerne Valley
         8/30  2:40 pm  34 33.4  116 32.0  3.0  	"
         8/30  5:15 pm  34 10.4  116 25.8  2.6  3 mi. NNE of Yucca Valley
         8/30  8:26 pm  34 38.0  116 30.0  2.5  28 mi. ENE of Lucerne Valley
         8/30 11:03 pm  34 37.7  116 40.4  2.6  20 mi. NE of Lucerne Valley
         8/31  2:25 am  34 27.3  116 28.1  4.2  23 mi. N of Yucca Valley; Felt
         8/31  2:51 am  34 56.4  116 47.4  2.7  13 mi. ENE of Barstow
         8/31  5:22 am  34 20.4  116 27.3  2.5  15 mi. N of Yucca Valley
         8/31  5:23 am  35 41.1  117 35.0  2.6  6 mi. NE of Ridgecrest
         8/31  6:48 am  34  8.9  116 25.0  2.8  2 mi. NE of Yucca Valley
         8/31  1:36 pm  34 56.4  116 47.4  2.8  13 mi. ENE of Barstow
         8/31  1:36 pm  34  6.0  116 38.5  2.6  10 mi. E of Mt. San Gorgonio
         8/31  2:00 pm  34 15.3  116 26.0  2.8  9 mi. N of Yucca Valley
         8/31  2:23 pm  34 12.6  116 49.7  2.5  4 mi. SSE of Big Bear City
         8/31  2:25 pm  33 18.7  118 30.7  3.0  11 mi. WSW of Avalon, 
Catalina Island
         8/31  3:54 pm  34 59.3  116 56.8  3.3  8 mi. NNE of Barstow
         8/31  7:57 pm  34 29.2  116 45.2  2.8  11 mi. ENE of Lucerne Valley
         8/31  9:29 pm  34  6.3  116 58.9  2.6  8 mi. W of Mt. San Gorgonio
         8/31  9:54 pm  34  2.3  116 21.4  2.5  7 mi. SE of Yucca Valley
         9/ 1  3:25 am  34 22.3  116 28.0  2.5  17 mi. N of Yucca Valley
         9/ 1  5:17 am  34 35.9  116 19.3  3.7  33 mi. NNE of Yucca Valley
         9/ 1  5:20 am  34 36.2  116 21.1  2.8  33 mi. N of Yucca Valley
         9/ 1  5:44 am  34 35.8  116 19.3  2.9  33 mi. NNE of Yucca Valley
         9/ 1  6:34 am  34 25.2  116 28.3  2.5  20 mi. N of Yucca Valley
         9/ 1  2:17 pm  34 16.0  116 46.1  3.0  4 mi. E of Big Bear City
         9/ 1  5:48 pm  34 19.6  116 27.5  3.2  14 mi. N of Yucca Valley
         9/ 1  5:56 pm  33 52.7  116 18.4  2.5  11 mi. NNE of Palm Desert
         9/ 1  5:56 pm  34 24.9  120  2.6  2.8  10 mi. W of Isla Vista
         9/ 1 10:54 pm  34 30.3  116 30.8  2.6  27 mi. N of Yucca Valley
         9/ 2  1:08 am  34 33.3  116 30.7  2.7  30 mi. N of Yucca Valley
         9/ 2  2:28 am  34  7.0  116 59.4  3.0  8 mi. SE of Running Springs
         9/ 2  2:43 am  34 20.8  116 28.0  2.8  15 mi. N of Yucca Valley
         9/ 2  3:26 am  33 52.9  116 14.9  2.9  11 mi. N of Indio
         9/ 2  3:45 am  35  1.5  116 58.2  2.6  9 mi. NNE of Barstow
         9/ 2 12:15 pm  33 59.7  116 20.7  2.5  10 mi. SE of Yucca Valley
         9/ 2  8:34 pm  35 55.3  117 42.2  2.5  16 mi. ESE of Coso Junction
         9/ 2 11:17 pm  34 22.3  116 26.4  3.6  17 mi. N of Yucca Valley
         9/ 2 11:48 pm  34  6.7  116 58.9  2.8  9 mi. SSW of town of Big 
Bear Lake
	-------------------------------------------------------------
Richard Cowen
Newsgroups: ca.earthquakes