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                    September 29, 1994

    Weekly Earthquake Report for Southern California
    ------------------------------------------------
                 September 22 - 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, September 22, Pacific Daylight Time, to midnight Wednesday
night, September 29, Pacific Daylight Time.  We recorded 327
earthquakes of M1.0 or larger this week.
    Just like last week, the only earthquake above M3 occurred
in the Mojave Desert, SSW of Baker.  This time it happened early
Monday morning and had a magnitude of M3.3.  Again, no-one
reported feeling an earthquake in our area this week.  In spite of
this, the total number of events is about the same as it has been
for the last few months.
    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
-------------------------------------------------------------
     9/22  7:15 am  35 56.9  117 57.8  2.2  6 mi. S of Coso Junction
     9/22  7:16 am  34 11.5  116 25.0  2.2  5 mi. NNE of Yucca Valley
     9/22  7:34 am  35 57.0  117 58.0  2.4  6 mi. S of Coso Junction
     9/22  9:57 am  35 45.4  118  0.6  2.0  20 mi. S of Coso Junction
     9/22 11:00 am  33 59.6  116 58.0  2.4  4 mi. N of Beaumont
     9/22 11:20 am  34  9.9  116 26.5  2.1  3 mi. N of Yucca Valley
     9/22 11:31 am  33 55.6  116 20.8  2.3  9 mi. ESE of Desert Hot
                    Springs
     9/22 10:37 pm  32 27.3  115 28.6  2.1  14 mi. S of Calexico
     9/23  2:43 am  35  1.2  116 58.5  2.0  9 mi. NNE of Barstow
     9/23  8:23 am  34 36.6  116 34.0  2.0  24 mi. ENE of Lucerne Valley
     9/23  9:41 am  34 13.5  118 24.8  2.0  4 mi. SSE of San Fernando
     9/23 10:51 am  34 37.3  116 39.8  2.7  20 mi. NE of Lucerne Valley
     9/23 12:34 pm  34 15.2  117 29.4  2.4  Lytle Creek, 4 mi. WNW of
                    the I15/I215 interchange
     9/23  1:30 pm  33 58.9  118 21.4  2.0  1 mi. SSE of Baldwin Hills
     9/23  3:04 pm  32 40.3  115 54.3  2.3  6 mi. SE of Ocotillo
     9/23  4:21 pm  34 27.8  116 30.8  2.2  24 mi. N of Yucca Valley
     9/23 10:22 pm  34 47.2  116 18.0  2.5  35 mi. SSW of Baker
     9/24  7:46 am  34 24.4  116 28.0  2.1  19 mi. N of Yucca Valley
     9/25  3:28 am  33 57.9  116 21.7  2.4  8 mi. E of Desert Hot Springs
     9/25  4:20 am  34 46.8  116 17.9  2.2  35 mi. SSW of Baker
     9/25  1:15 pm  34 14.6  118 31.3  2.3  Under Northridge
     9/25  1:29 pm  33 15.3  116 17.5  2.3  4 mi. E of Borrego Springs
     9/25  6:15 pm  34  8.7  116 50.5  2.1  3 mi. NNW of Mt. San Gorgonio
     9/25  7:49 pm  33 58.4  116 47.4  2.2  3 mi. N of Cabazon
     9/25  9:11 pm  34 23.5  116 27.8  2.0  18 mi. N of Yucca Valley
     9/26  1:58 am  34 47.7  116 17.8  3.3  34 mi. SSW of Baker
     9/26  2:29 am  34 47.0  116 17.6  2.1      "
     9/26  3:26 am  34 47.6  116 17.8  2.0      "
     9/26  3:57 am  34 47.7  116 17.7  2.7      "
     9/26 12:08 pm  34 35.6  116 36.1  2.0  22 mi. ENE of Lucerne Valley
     9/26 10:28 pm  34 19.9  116 28.2  2.2  14 mi. N of Yucca Valley
     9/26 10:48 pm  34 22.1  116 27.9  2.7  17 mi. N of Yucca Valley
     9/27  1:19 am  34 17.6  118 28.3  2.2  2 mi. WNW of San Fernando
     9/27 12:20 pm  34 22.1  116 28.0  2.0  17 mi. N of Yucca Valley
     9/27 12:53 pm  34  0.8  116 19.5  2.2  9 mi. SE of Yucca Valley
     9/27  4:19 pm  34 48.9  120 56.2  2.8  23 mi. NW of Pt. Arguello
     9/27  5:57 pm  34 15.2  119 39.9  2.9  11 mi. S of Santa Barbara
     9/27  6:11 pm  35  9.6  120 37.1  2.9  8 mi. SSE of San Luis Obispo
     9/27  7:51 pm  34 47.2  116 18.0  2.9  35 mi. SSW of Baker
     9/28  2:29 am  34 37.0  116 40.4  2.3  19 mi. NE of Lucerne Valley
     9/28  8:52 am  33 54.7  120 16.1  2.7  9 mi. SE of San Miguel Is.
     9/28  5:03 pm  33 30.3  117 55.0  2.1  7 mi. S of Newport Beach
     9/28  7:52 pm  34  7.4  117 34.4  2.2  Rancho Cucamonga, 4 mi. NNW
                    of the I10/I15 interchange
     9/28 10:22 pm  33  1.6  116 22.3  2.1  15 mi. S of Borrego Springs
    -------------------------------------------------------------

    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.

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

                                 CDMG ONLINE
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