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- March 2, 1995
-
- Weekly Earthquake Report for Southern California
- ------------------------------------------------
- February 23 - March 1, 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, February 23, Pacific Standard Time, to midnight
- Wednesday night, March 1, 1995, Pacific Standard Time. We
- recorded 281 earthquakes of M1.0 or larger during the 7-day period
- covered.
- The largest quakes this week were also the most widely
- felt. A pair of M3.7's occurred 20 seconds apart early Wednesday
- morning, about 11 miles W of Palos Verdes Point. They were felt
- in the South Bay and West L.A. areas, as well as San Fernando
- Valley. They were followed by four aftershocks ranging from 2.0
- to 2.8 within the next four minutes. As regular readers of this
- Report know, the offshore region, known as the Continental
- Borderland, is a fairly active area, so these quakes were no
- surprise. They were not aftershocks of any previous quake.
- Two quakes near Yucca Valley (a M3.2 and a M3.0) were felt
- on Monday morning. These two were Landers aftershocks. Although
- the two active aftershock zones, Northridge and Landers, are both
- still very clear on the seismicity map, these two were the only
- events this week of any significance.
- Also, a small quake (M2.5) in the Santa Ana Mtns. was lightly
- felt last night. Like the offshore quakes, it was part of our
- routine seismic activity and not an aftershock.
- 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
- -------------------------------------------------------------
- 2/23 12:37 am 34 37.6 116 36.2 2.1 23 mi. ENE of Lucerne Valley
- 2/23 4:58 am 35 16.1 118 34.1 2.0 11 mi. NW of Tehachapi
- 2/23 1:02 pm 33 58.4 118 27.2 2.1 Under Marina del Rey
- 2/23 3:48 pm 36 12.4 118 20.4 2.5 19 mi. WSW of Olancha
- 2/23 5:25 pm 36 13.4 118 20.6 2.6 "
- 2/23 7:26 pm 33 56.2 116 39.7 2.5 7 mi. E Cabazon
- 2/23 10:51 pm 34 28.1 116 33.2 2.1 22 mi. NE of Big Bear City
- 2/24 2:58 am 34 14.0 116 26.6 2.3 7 mi. N of Yucca Valley
- 2/24 9:41 am 36 3.9 117 51.0 2.5 5 mi. ENE of Coso Junction
- 2/24 9:41 am 34 18.7 116 26.3 2.0 13 mi. N of Yucca Valley
- 2/24 10:12 am 34 2.3 118 54.6 2.4 1 mi. E of Leo Carrillo
- State Beach
- 2/24 1:46 pm 34 1.8 117 6.7 2.1 4 mi. ESE of Redlands
- 2/25 12:39 am 34 0.1 118 9.8 2.0 4 mi. S of the I10/I710
- interchange/City of Commerce
- 2/25 3:14 am 34 22.1 116 28.3 2.0 17 mi. N of Yucca Valley
- 2/25 7:48 am 34 16.5 116 47.8 2.4 3 mi. ENE of Big Bear City
- 2/25 8:34 am 32 50.6 118 18.4 2.9 2 mi. NE of San Clemente Is.
- 2/25 6:24 pm 34 18.4 116 26.5 2.2 13 mi. N of Yucca Valley
- 2/25 10:04 pm 36 4.0 117 51.2 2.2 5 mi. ENE of Coso Junction
- 2/25 11:22 pm 34 48.5 120 10.9 2.0 14 mi. N of Solvang
- 2/26 3:10 am 33 41.0 116 43.3 2.3 4 mi. S of Idyllwild
- 2/26 9:21 am 34 15.2 118 28.1 2.2 2 mi. SW of San Fernando
- 2/26 9:21 am 32 38.9 115 53.5 2.0 8 mi. SE of Ocotillo
- 2/26 12:02 pm 34 22.6 116 27.6 3.2 17 mi. N of Yucca Valley
- 2/26 12:08 pm 34 22.8 116 27.3 2.0 "
- 2/26 3:21 pm 34 48.8 116 7.2 2.0 31 mi. S of Baker
- 2/27 4:28 am 34 19.3 116 28.9 2.0 14 mi. N of Yucca Valley
- 2/27 5:49 am 34 58.4 116 58.9 2.3 6 mi. NNE of Barstow
- 2/27 8:36 am 34 3.1 116 26.1 3.2 4 mi. S of Yucca Valley
- FELT
- 2/27 10:05 am 34 4.0 116 22.5 2.5 5 mi. SE of Yucca Valley
- 2/27 10:53 am 34 3.1 116 26.2 3.0 4 mi. S of Yucca Valley
- FELT
- 2/27 10:59 am 33 57.0 119 58.1 2.2 8 mi. SSW of Santa Cruz Is.
- 2/27 12:30 pm 33 39.9 116 45.2 2.2 5 mi. SSW of Idyllwild
- 2/28 12:12 am 33 58.6 116 38.3 2.1 7 mi. W of Desert Hot Springs
- 2/28 3:36 am 35 39.8 117 37.7 2.1 3 mi. NE of Ridgecrest
- 2/28 7:36 am 34 0.5 117 0.9 2.7 5 mi. NNW of Beaumont
- 2/28 9:09 am 33 11.7 115 34.3 2.0 4 mi. SW of Niland
- 2/28 9:25 am 34 34.5 116 35.0 2.0 22 mi. ENE of Lucerne Valley
- 2/28 11:43 am 34 24.9 116 28.6 2.0 20 mi. N of Yucca Valley
- 2/28 11:56 am 34 33.9 116 31.7 2.2 25 mi. ENE of Lucerne Valley
- 2/28 11:05 pm 34 16.4 118 27.9 2.2 1 mi. WSW of San Fernando
- 3/1 2:49 am 36 3.8 117 51.0 2.1 5 mi. ENE of Coso Junction
- 3/1 3:09 am 35 21.2 118 36.9 2.2 15 mi. NE of Arvin
- 3/1 3:43 am 34 0.5 117 10.9 2.2 3 mi. S of Redlands
- 3/1 3:47 am 34 57.6 116 56.5 2.0 6 mi. NE of Barstow
- 3/1 5:49 am 34 20.4 116 28.0 2.1 15 mi. N of Yucca Valley
- 3/1 7:56 am 33 44.7 118 36.8 3.7 11 mi. W of Palos Verdes
- Point; FELT
- 3/1 7:56 am 33 45.2 118 36.0 3.7 (20 sec later) " FELT
- 3/1 7:58 am 33 44.8 118 37.8 2.0 "
- 3/1 7:58 am 33 44.6 118 36.6 2.8 "
- 3/1 7:59 am 33 44.9 118 36.4 2.6 "
- 3/1 7:59 am 33 45.2 118 36.5 2.2 "
- 3/1 11:18 am 34 18.1 116 27.0 2.0 12 mi. N of Yucca Valley
- 3/1 2:57 pm 34 2.3 117 31.2 2.3 2 mi. SE of the I10/I15
- interchange
- 3/1 9:13 pm 33 44.6 117 29.9 2.5 9 mi. SSE of Corona; FELT
- Santa Ana Mtns
- 3/1 11:09 pm 34 9.8 116 26.5 2.3 3 mi. N of Yucca Valley
- -------------------------------------------------------------