|
Posted by Lowell on August 16, 2001 at 22:08:16:
Two interesting earthquakes occurred in the U.S. today - a swarm
near San Clemente Island, CA and a small event in Connecticut
(reported today, but actually occurred yesterday). Here is some
historical information regarding the seismicity of these two
areas:
The most unusual event reported in the U.S. today occurred in Connecticut.
While this event was only Ml 1.9, it is the largest within 50 km
of it's epicenter in the past 14 years.
Following are the details of this event (which fittingly enough
occurred near HAZARDVILLE, CT). 15AUG2001 14:44:36 41.9N 72.3W MC=1.9 LDGO E of Hazardville, CT Information on earthquakes in the NE United States can be found at: http://www.ldeo.columbia.edu/cgi-bin/quake.cgi A swarm of events off the coast of Southern California west of
San Diego nearly beat out the Andreanoff Island earthquake (MB 4.5) as the
largest in the region and was the largest of the UT day. These occurred
with Ml 4.4, 4.2, 3.2 and 3.1. In the past 20 years only 3 earthquakes
within 50 km of these epicenters have had Ml>4.4. These occurred
on June 20, 1997 (Ml 4.7); July 13, 1986 (Ml 5.3); and April 4, 1990 (Ml 4.7).
The only prior swarm in the area in the past 100 years similar to today's
occurred on June 20, 1997 (Ml 4.4, 4.2, 4.6). Following are the details of these events: 16AUG2001 20:04:18 32.7N 118.2W ML=3.2 SCSN SSE of San Clemente Is., CA
16AUG2001 18:04:32 32.7N 118.2W ML=4.4 SCSN SE of San Clemente Is., CA
16AUG2001 22:06:27 32.7N 118.2W ML=4.2 SCSN ESE of San Clemente Is., CA
16AUG2001 20:37:00 32.7N 118.2W ML=3.1 SCSN ESE of San Clemente Is., CA
16Aug2001 18:04:33 32.7N 118.2W ML=4.4 NEIS OFF COAST OF CALIFORNIA Information on earthquakes in Southern California can be found at: http://www.scecdc.scec.org/scecusers/.plan
|
