SOUTHERN CALIFORNIA
	     	           SEISMOGRAPHIC NETWORK

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


						November 26, 1997

		Weekly Earthquake Report for Southern California
		------------------------------------------------
                	     November 20 - 25, 1997              

	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 626-395-6327.  For daily 
	updates, call our Earthquake Information Hotline: 626-395-6977.
			--------------------------------
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	If you receive this Report by FAX and if you have recently had
	a change of AREA CODE, please notify us ASAP.  We have no other
	way to know which fax numbers need to be changed!!  Actually, if
	your area code is 818 and it HASN'T changed, it would be helpful
	to know that, too.
	*****************************************************************
	This week's Report covers the time period from midnight Thursday
	morning, November 20, Universal Time (ie. UTC), to midnight 
	Wednesday night, November 25, Universal Time.  In local time, 
	the period of coverage is from 4 p.m., November 19, Pacific 
	Standard Time, to 4 p.m., November 25, Pacific Standard Time.  
	This week's Report covers a shorter time period than usual
	because tomorrow is a holiday.  We detected 105 earthquakes during 
	the six-day period covered. 
		These Weekly Reports should not be used for archival 
	purposes.  Further data processing often changes the magnitudes 
	slightly and, especially during times of high seismicity, 
	sometimes changes the estimates of total seismicity.  For the 
	best earthquake catalog currently available, see: 
		http://scec.gps.caltech.edu/catalog-search.html
		While Mammoth Lakes (see Northern California report) had
	another exciting weekend, we had a very quiet time.  Our largest
	quake was a M2.6 near Ridgecrest on Saturday afternoon.  No events
	in our area were reported 'felt'.  And no, it doesn't make us 
	nervous to have so few events.  When it's quiet, it's quiet.
		Table 1 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  
	-------------------------------------------------------------
        11/19  4:41 pm  34 16.3  116 52.0  2.4  Under Big Bear City
        11/20  6:20 am  36  3.8  117 38.3  2.1  17 mi. E of Coso Junction
        11/20  6:24 am  36  3.8  117 38.2  2.3  	"
        11/20 10:32 am  32  8.3  116 27.1  2.5  44 mi. SE of San Ysidro
        11/20 11:53 pm  35  4.2  118 27.1  2.3  4 mi. S of Tehachapi
        11/21  4:31 am  36  3.7  117 38.3  2.1  17 mi. E of Coso Junction
        11/21 10:33 am  33 10.1  116  2.2  2.1  5 mi. ENE of Ocotillo 
						Wells
        11/22  5:46 am  35 31.6  117 28.8  2.6  12 mi. ESE of Ridgecrest
        11/22  1:48 pm  34 50.2  116 17.0  2.1  31 mi. SSW of Baker
        11/22 10:20 pm  34 18.1  116 27.1  2.2  12 mi. N of Yucca Valley
        11/24 12:34 am  33 17.4  116 15.3  2.1  7 mi. ENE of Borrego 
						Springs
        11/24  4:41 am  33 57.0  118 18.4  2.1  1 mi. SE of Inglewood
        11/24  6:19 pm  37 15.8  117 50.0  2.1  26 mi. ENE of Big Pine
        11/25  8:56 am  36  3.7  117 38.3  2.4  17 mi. E of Coso Junction
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