June 30, 1994

		Weekly Earthquake Report for Southern California
		------------------------------------------------
		               June 23 - 29, 1994

	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 818-395-6326.
	For daily updates, call our Earthquake Information Hotline:
	818-395-6977.

			--------------------------------

	This week's Report covers the time period from midnight Thursday
	morning, June 23, Pacific Daylight Time, to midnight Wednesday
	night, June 29, Pacific Daylight Time.  We recorded 294 earthquakes
	this week, compared to 429 last week.
		Yes, it was a quiet week, for a change.  The largest
	event was a M3.5 early Monday morning near Barstow, a member of
	the Bastow group of Landers aftershocks.  There was one more
	M3+, just after midnight on Wednesday morning, that was a Landers
	aftershock and three more that were not.  The Magic Mountain quake
	on Friday afternoon (M3.0) was a Northridge aftershock.
		The table lists the quakes 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 Daylight
	Time listed.

	Table 1
	-------
	Date  Time      N Lat.   W Long.   Mag  
	-------------------------------------------------------------
         6/23  2:03 am  34 30.8  116 31.6  2.3  27 mi. N of Yucca Valley
         6/23  3:24 am  33 59.1  116 59.2  2.2  3 mi. N of Beaumont
         6/23  3:36 am  34 22.6  116 27.8  2.3  17 mi. N of Yucca Valley
         6/23  3:41 am  34 29.6  116 31.2  2.1  26 mi. N of Yucca Valley
         6/23  6:40 am  34 22.2  116 28.1  2.3  17 mi. N of Yucca Valley
         6/23 12:45 pm  34 17.8  116 48.2  2.5  3 mi. NE of Big Bear City
         6/23 12:46 pm  34 50.8  118 55.9  2.5  2 mi. NNE of Frazier Park
         6/24 12:13 pm  34 27.3  118 35.2  3.0  2 mi. N of Magic Mtn.
         6/24 12:58 pm  34  1.7  116 26.5  2.0  6 mi. S of Yucca Valley
         6/24  1:20 pm  34 22.1  116 54.1  3.1  5 mi. SSE of Lucerne Valley
         6/25 12:29 am  34 12.2  118 34.2  2.4  1 mi. E of Canoga Park
         6/25  1:52 am  33 51.0  120  6.5  2.2  6 mi. S of Santa Rosa Is. 
         6/25  6:19 am  34 28.8  116 30.6  2.1  25 mi. N of Yucca Valley
         6/25  7:39 am  32 39.1  116  2.2  2.3  6 mi. SSW of Ocotillo
         6/25  2:05 pm  34 18.0  118 24.0  2.2  2 mi. ENE of San Fernando
         6/25  5:29 pm  34 21.7  116 23.5  2.4  17 mi. N of Yucca Valley
         6/25 11:34 pm  34 17.3  118 27.0  2.4  Under San Fernando
         6/26  8:54 am  32 25.5  115 28.7  2.0  16 mi. S of Calexico
         6/26 10:47 am  34 11.1  117 44.5  2.0  5 mi. N of Claremont Colleges
         6/26  3:58 pm  34  9.9  116 49.9  2.8  4 mi. N of Mt. San Gorgonio
         6/27 12:18 am  36 58.6  117 42.9  2.3  32 mi. NE of Lone Pine
         6/27  3:53 am  35  1.9  116 59.4  3.5  10 mi. N of Barstow; FELT
         6/27  4:45 am  34 19.5  118 27.2  2.0  3 mi. NNW of San Fernando
         6/27  8:48 am  34 16.3  116 45.1  2.6  5 mi. E of Big Bear City
         6/27  1:01 pm  32 53.3  117 40.8  2.1  24 mi. W of La Jolla
         6/27  1:06 pm  34 16.7  118 40.6  2.4  1 mi. E of Simi Valley
         6/27  5:09 pm  34 23.1  116 27.3  2.1  18 mi. N of Yucca Valley
         6/27  8:22 pm  33 52.7  119 34.1  2.8  10 mi. SSW of Santa Cruz Is. 
         6/27 11:19 pm  33 57.6  116 20.4  2.3  9 mi. E of Desert Hot Springs
         6/28 12:10 am  34 21.7  116 28.6  2.0  16 mi. N of Yucca Valley
         6/28  2:41 am  34 14.2  118 25.8  2.1  3 mi. S of San Fernando
         6/28  3:55 am  34  2.3  117 32.9  2.6  1 mi. S of the I10/I15 inter-
						change
         6/28  5:16 am  34 16.2  118 31.7  2.5  2 mi. N of Northridge
         6/28  3:03 pm  33 22.0  116 23.6  3.2  7 mi. N of Borrego Springs
         6/29 12:31 am  34 16.5  116 24.6  2.0  10 mi. N of Yucca Valley
         6/29 12:34 am  34 16.4  116 24.7  3.4  	"
         6/29 12:46 am  32 19.9  115 15.3  2.9  27 mi. SSE of Calexico
         6/29  3:18 am  34 16.5  116 24.5  2.1  11 mi. N of Yucca Valley
         6/29  6:04 am  32 39.7  115 54.2  2.1  7 mi. SE of Ocotillo
         6/29  6:43 am  34 34.6  120  3.2  2.1  4 mi. ESE of Solvang
         6/29  7:44 am  33 48.5  116 12.1  2.0  6 mi. N of Indio
         6/29  8:09 am  34 23.5  118 35.0  2.2  2 mi. S of Magic Mtn.
         6/29  9:07 am  33  3.1  117 45.1  2.5  26 mi. SSW of San Clemente
         6/29  9:44 am  35  8.8  118 42.4  2.0  8 mi. ESE of Arvin
        -------------------------------------------------------------

        Figure 1. A map of southern California showing the earthquakes
        recorded during the past week by the Caltech/USGS Seismic
        Network.  Major faults are marked, as well as the metropolitan
        areas of Los Angeles (L.A.), Palm Springs (P.S.), San Diego
        (S.D.), and Santa Barbara (S.B.).  The circles denote the
	earthquakes, the size of the circle indicating the magnitude.