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- March 23, 1995
-
- Weekly Earthquake Report for Southern California
- ------------------------------------------------
- March 16 - 22, 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, March 16, Pacific Standard Time, to midnight
- Wednesday night, March 22, 1995, Pacific Standard Time. We
- recorded 260 earthquakes of M1.0 or larger during the 7-day
- period covered.
- It was indeed a quiet week. The largest quake was a M3.3
- very early Saturday morning in the Beaumont/Yucaipa area. In that
- region, the San Andreas fault splits up into several strands.
- None of the strands are continuous at the Earth's surface, so the
- "active trace" of the San Andreas is not well-defined. This week's
- earthquake was located between the Banning strand and the Mission
- Creek strand. Its focal mechanism shows oblique reverse motion
- on an east-striking fault, which means that the fault strikes
- east-west, and the block of rock on the north side moved up and to
- the east compared to the south side. Although the quake was a few
- miles removed from both towns and could have been felt, we got no
- reports.
- All other quakes were less than M3 in magnitude.
- 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
- -------------------------------------------------------------
- 3/16 3:54 am 34 6.4 116 51.9 2.2 2 mi. W of Mt. San Gorgonio
- 3/16 5:32 pm 34 6.5 116 51.7 2.1 "
- 3/16 6:57 pm 34 36.0 116 38.8 2.1 20 mi. ENE of Lucerne
- Valley
- 3/16 7:07 pm 33 40.7 116 48.3 2.1 7 mi. SW of Idyllwild
- 3/16 8:08 pm 33 42.0 116 45.7 2.6 4 mi. SW of Idyllwild
- 3/16 8:19 pm 36 4.7 117 49.9 2.1 6 mi. ENE of Coso Junction
- 3/16 9:25 pm 33 43.7 118 39.3 2.2 13 mi. WSW of Palos Verdes
- Point
- 3/16 9:57 pm 34 34.5 116 35.3 2.3 22 mi. ENE of Lucerne
- Valley
- 3/17 3:58 am 33 37.2 116 43.1 2.4 5 mi. NNW of Anza
- 3/17 5:50 am 34 6.6 116 51.8 2.2 2 mi. WNW of Mt. San
- Gorgonio
- 3/17 6:17 am 33 42.2 116 45.6 2.0 3 mi. SW of Idyllwild
- 3/17 6:40 am 32 46.5 118 18.0 2.3 4 mi. SE of San Clemente
- Is.
- 3/17 4:09 pm 35 0.8 116 57.6 2.0 9 mi. NNE of Barstow
- 3/17 9:17 pm 34 28.6 116 29.5 2.0 24 mi. N of Yucca Valley
- 3/18 12:30 am 34 1.8 116 57.3 3.3 7 mi. N of Beaumont
- 3/18 3:09 am 33 11.8 115 34.8 2.0 4 mi. SW of Niland
- 3/18 3:10 am 34 2.3 116 57.7 2.1 7 mi. N of Beaumont
- 3/18 3:49 am 34 4.3 116 59.1 2.1 9 mi. N of Beaumont
- 3/18 6:52 am 34 22.5 116 27.5 2.0 17 mi. N of Yucca Valley
- 3/18 2:45 pm 34 8.0 117 0.0 2.0 7 mi. SE of Running
- Springs
- 3/18 7:44 pm 34 6.5 116 51.9 2.1 2 mi. WNW of Mt. San
- Gorgonio
- 3/18 8:38 pm 36 4.8 117 50.2 2.2 6 mi. ENE of Coso Junction
- 3/19 12:36 am 34 56.9 116 46.5 2.1 14 mi. ENE of Barstow
- 3/19 3:17 am 34 22.5 116 27.1 2.1 17 mi. N of Yucca Valley
- 3/19 4:11 am 34 18.8 116 53.1 2.3 3 mi. NNW of Big Bear City
- 3/19 12:52 pm 33 55.6 116 19.0 2.0 10 mi. ESE of Desert Hot
- Springs
- 3/19 4:18 pm 34 24.1 118 37.8 2.1 2 mi. WSW of Magic Mtn.
- 3/19 5:42 pm 34 20.2 118 44.4 2.1 4 mi. NNW of Simi Valley
- 3/19 7:54 pm 34 7.3 119 1.4 2.0 6 mi. S of Camarillo
- 3/19 7:54 pm 34 24.1 118 38.3 2.0 3 mi. WSW of Magic Mtn.
- 3/19 11:43 pm 34 18.0 116 27.3 2.0 12 mi. N of Yucca Valley
- 3/20 6:23 am 34 16.6 116 26.3 2.1 10 mi. N of Yucca Valley
- 3/20 7:53 am 34 2.4 118 6.1 2.0 2 mi. ESE of Monterey Park
- 3/20 2:01 pm 34 14.1 117 28.8 2.0 3 mi. WNW of I15/I215
- interchange/Lytle Creek
- 3/21 1:55 am 34 47.1 116 17.9 2.0 35 mi. SSW of Baker
- 3/21 8:30 am 32 45.0 115 26.1 2.7 6 mi. NNE of Calexico
- 3/21 1:13 pm 33 52.3 117 56.6 2.0 2 mi. ENE of I5/91
- interchange/Fullerton
- 3/21 4:03 pm 33 58.3 118 26.3 2.1 Under Marina del Rey
- 3/21 6:30 pm 34 33.2 120 41.2 2.0 2 mi. SW of Pt. Arguello
- 3/21 6:30 pm 34 33.2 120 41.2 2.0 "
- 3/22 6:42 am 33 35.1 116 25.5 2.0 9 mi. SSW of Palm Desert
- 3/22 11:48 am 35 1.9 117 0.3 2.2 9 mi. N of Barstow
- 3/22 4:34 pm 34 10.4 116 25.8 2.0 3 mi. NNE of Yucca Valley
- 3/22 6:40 pm 34 15.0 118 27.9 2.4 2 mi. SW of San Fernando
- 3/22 11:11 pm 34 22.1 118 39.8 2.4 5 mi. SW of Magic Mtn.
- -------------------------------------------------------------