SOUTHERN CALIFORNIA
	     	           SEISMOGRAPHIC NETWORK

			  A Cooperative Project of
	          Caltech and the U.S. Geological Survey


						October 26, 1995

		Weekly Earthquake Report for Southern California
		------------------------------------------------
        		      October 19 - 25, 1995

	Prepared by:  Kate Hutton, Seismological Laboratory
		      (kate@bombay.gps.caltech.edu)
                      Lucy Jones, U.S. Geological Survey
		      California Institute of Technology

	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, October 19, Pacific Daylight Time, to midnight 
	Wednesday night, October 25, 1995, Pacific Daylight Time.  We 
	detected and processed 619 earthquakes during the 7-day period 
	covered.
		The week's largest event was a M3.9 Landers aftershock
	(or the June 28, '92 Mw7.3 mainshock) Sunday morning, located 
	very close to the town of Yucca Valley, with the right-lateral 
	strike-slip focal mechanism typical of the Landers sequence.
	It was fairly widely felt in that area and in the Inland Empire.
	Notice that it produced a few small aftershocks of its own.
		The second largest quakes were two separate M3.3
	Ridgecrest quakes, one last Thursday night and one late Wednesday
	morning.  Strangely, we got felt calls about the first one, but
	not about the second one.  Perhaps this is because most people 
	trying to go to sleep at 10:51 pm and readily notice disturbances
	like small earthquakes.
		The table lists the quakes this week that were M2.0 or 
	larger in the central part of the coverage area.  Times are local 
	times; if you want Greenwich Mean Time, add 7 hrs to the Pacific 
	Daylight Time or 8 hrs to the Pacific Standard Time listed.

	Table 1
	-------
	Date  Time      N Lat.   W Long.   Mag  
	-------------------------------------------------------------
        10/19  4:53 am  33 21.8  116 24.0  2.6  7 mi. NNW of Borrego 
						Springs
        10/19  7:43 am  33 57.3  116 51.2  2.0  2 mi. NE of Banning
        10/19  9:06 am  35 44.8  117 38.0  2.3  8 mi. NNE of Ridgecrest
        10/19  9:40 am  35 44.5  117 38.0  2.2  	"
        10/19  2:09 pm  34 30.2  116 30.9  2.2  26 mi. N of Yucca Valley
        10/19  4:19 pm  34 23.7  116 28.3  2.4  19 mi. N of Yucca Valley
        10/19 10:51 pm  35 47.1  117 39.4  3.3  11 mi. N of Ridgecrest
						FELT
        10/20 12:58 am  35 44.2  117 37.8  2.9  8 mi. NNE of Ridgecrest
        10/20  2:29 am  35 44.7  117 37.3  2.5  	"
        10/20  7:40 am  35 43.3  117 37.5  2.2  7 mi. NNE of Ridgecrest
        10/20  8:05 am  35 43.6  117 37.8  2.0  	"
        10/20  2:56 pm  35 47.6  117 38.5  2.4  11 mi. N of Ridgecrest
        10/20 11:32 pm  34 14.5  118 32.2  2.0  Under Northridge
        10/21  2:41 pm  35 47.5  117 40.0  2.0  11 mi. N Ridgecrest
        10/21  6:56 pm  35 44.8  117 38.2  2.3  8 mi. N of Ridgecrest
        10/21  9:51 pm  36  0.9  117 47.8  2.6  8 mi. ESE of Coso 
						Junction
        10/22  6:56 am  33 40.9  116  1.1  2.0  8 mi. NNE of Mecca
        10/22  7:05 am  35  2.5  117  3.1  2.0  10 mi. N of Barstow
        10/22  7:41 am  34  8.3  116 26.0  3.9  1 mi. NNE of Yucca Valley
						FELT
        10/22  7:42 am  34  8.4  116 25.7  2.2  	"
        10/22 12:01 pm  34  8.5  116 25.8  2.0  	"
        10/22  5:51 pm  34 21.1  116 28.0  2.6  16 mi. N of Yucca Valley
        10/22  7:22 pm  35 46.7  117 39.2  2.5  10 mi. N of Ridgecrest
        10/22  9:49 pm  35 44.6  117 40.3  2.1  8 mi. N of Ridgecrest
        10/22 10:35 pm  34  8.6  116 25.9  2.2  1 mi. NNE of Yucca Valley
        10/22 11:21 pm  35 46.5  117 37.6  2.0  10 mi. NNE of Ridgecrest
        10/23  4:20 am  35 44.6  117 40.5  2.1  8 mi. N of Ridgecrest
        10/23 11:59 am  34  0.3  116 19.4  2.7  9 mi. S of Joshua Tree
        10/23  1:33 pm  35 45.2  117 38.0  2.5  9 mi. NNE of Ridgecrest
        10/23  5:19 pm  35 47.0  117 39.0  2.1  11 mi. N of Ridgecrest
        10/24 10:51 am  35 45.2  117 38.8  2.2  9 mi. N of Ridgecrest
        10/24  7:40 pm  35 45.2  117 38.1  2.9  	"
        10/25 12:43 am  34 46.3  118 18.1  2.1  8 mi. NNE of Elizabeth 
						Lake
        10/25 10:58 am  35 46.3  117 39.1  2.1  10 mi. N of Ridgecrest
        10/25 11:18 am  35 45.8  117 37.7  3.3  10 mi. NNE of Ridgecrest
        10/25 11:47 am  35 44.9  117 37.6  2.0  9 mi. NNE of Ridgecrest
        10/25  4:03 pm  34 36.5  116 38.0  2.1  21 mi. ENE of Lucerne 
						Valley
        10/25  7:31 pm  35 47.2  117 37.8  2.4  11 mi. N of Ridgecrest
        10/25 10:25 pm  35 47.5  117 38.6  2.2  	"
	-------------------------------------------------------------