SOUTHERN CALIFORNIA
	     	           SEISMOGRAPHIC NETWORK

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


						June 27, 1996

		Weekly Earthquake Report for Southern California
		------------------------------------------------
        	             June 20 - 26, 1996                   

	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, June 20, Universal Time (ie. GMT), to midnight Wednesday 
	night, June 26, Universal Time.  In local time, the period of 
	coverage is from 5 p.m., June 19, Pacific Daylight Time, to 5 p.m., 
	June 26, Pacific Daylight Time.  We detected and processed 266 
	earthquakes during the 7-day period covered.
		In keeping with the low seismicity that we have been
	experiencing, there were no earthquakes reported felt this week.  
	The largest event was a M3.2 in the northern Imperial Valley,
	near Obsidain Butte.  This event was part of a small swarm.
	Obsidian Butte is typical of the Brawley Seismic Zone, that 
	connects the southern end of the San Andreas Fault with the 
	northern end of the Imperial Fault; it is a regular producer
	of swarm activity.
		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  
	-------------------------------------------------------------
         6/19  9:24 pm  34  1.5  117  6.0  2.2  3 mi. W of Yucaipa
         6/20  8:52 am  34  8.7  116 44.4  2.0  5 mi. ENE of Mt. San 
						Gorgonio
         6/20 12:39 pm  34 57.9  116 56.7  2.0  6 mi. NE  of Barstow
         6/20  7:16 pm  33 10.8  115 35.8  3.2  2 mi. ENE of Obsidian 
						Butte, Imperial Valley
         6/20  7:26 pm  33 10.8  115 36.0  2.4  	"
         6/20  8:16 pm  33 10.9  115 36.2  2.1  	"
         6/20  8:56 pm  35 46.5  117 39.1  2.0  10 mi. N of Ridgecrest
         6/20 10:17 pm  34  1.2  119  2.8  2.1  6 mi. WSW of Leo Carrillo 
						State Beach
         6/21  6:53 am  34 22.4  118 43.8  2.0  6 mi. N of Simi Valley
         6/21  7:20 am  34 56.0  116 54.1  2.2  7 mi. ENE of Barstow
         6/21  2:24 pm  34 23.6  120 41.5  2.0  12 mi. S of Pt. Arguello
         6/21  7:32 pm  34 14.5  118 29.0  2.1  2 mi. SSE of Granada Hills
         6/21  9:21 pm  33  4.6  117 54.6  2.8  28 mi. SSW of Dana Point
         6/21  9:27 pm  33  4.0  117 53.1  2.1  	"
         6/21  9:30 pm  33  4.0  117 53.3  2.0  	"
         6/21 10:47 pm  32 56.2  117 53.8  2.0  27 mi. ENE of San 
						Clemente Is.
         6/21 11:40 pm  34 59.3  116 56.8  2.0  8 mi. NNE of Barstow
         6/22  6:10 am  33 45.2  120 19.3  2.2  19 mi. S of San Miguel Is.
         6/22 12:23 pm  33 49.6  117  2.4  2.0  6 mi. NW of Hemet
         6/22  3:47 pm  34 27.5  116 30.2  2.2  23 mi. N of Yucca Valley
         6/23  8:22 am  33 29.8  118 12.2  2.0  12 mi. NNE of Avalon, 
						Catalina Island
         6/23  6:21 pm  33 26.6  116 25.1  2.3  13 mi. NNW of Borrego 
						Springs
         6/24  6:10 am  34 22.0  118 39.9  2.5  6 mi. NNE of Simi Valley
         6/24  6:39 am  34 21.8  118 39.9  2.3  6 mi. NNE of Simi Valley
         6/24  8:09 am  33 55.8  116 21.6  2.4  8 mi. ESE of Desert Hot 
						Springs
         6/24  2:02 pm  34 16.1  118 26.2  2.1  1 mi. S of Pacoima
         6/24  2:11 pm  34 15.7  118 25.8  2.1  1 mi. SSE of Pacoima
         6/24  6:45 pm  33 30.1  116 30.6  2.2  9 mi. ESE of Anza
         6/25  6:50 am  35 44.7  117 38.0  2.0  8 mi. NNE of Ridgecrest
         6/25 11:45 am  35 15.4  116 30.4  2.3  22 mi. ESE of Goldstone 
						Lake
         6/25 12:14 pm  34  1.4  117  6.8  2.4  4 mi. ESE of Redlands
         6/25  4:43 pm  35 44.8  117 37.9  2.3  8 mi. NNE of Ridgecrest
         6/25  5:08 pm  33 13.6  116  4.9  2.4  6 mi. NNE of Ocotillo 
						Wells
         6/25  6:46 pm  34 22.3  118 38.6  2.0  4 mi. WSW of Valencia
         6/26  3:34 am  35 45.3  118  2.3  2.0  20 mi. SSW of Coso 
						Junction
         6/26  4:48 am  32 55.4  117 42.5  2.1  26 mi. SW of Oceanside
	-------------------------------------------------------------