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PRELIMINARY EARTHQUAKE REPORT
Rapid Earthquake Location Service U.S. Geological Survey, Menlo Park, California U.C. Berkeley Seismological Laboratory, Berkeley, California Version 2: Updates lower and earlier versions of this earthquake report A LIGHT EARTHQUAKE OCCURRED AT 05:40 PM PDT Monday, May 21, 2001. THE MAGNITUDE 4.1 (ML) EVENT IS LOCATED 30 MILES WNW OF PUNTA GORDA, CA THE HYPOCENTRAL DEPTH IS 9.8 MILES. This event has been reviewed by Hal Macbeth -USGS NCSN. PRINCIPAL EARTHQUAKE PARAMETERS _______________________________ Magnitude : 4.07 ML Event Date & Time : 05/21/2001 05:40:39 PM PDT 05/22/2001 00:40:39 UTC Location : 40.4628 N, 124.8633 W : (40 deg. 27.77 min. N, 124 deg. 51.80 min. W) Depth : 15.7 km. deep ( 9.8 miles) Location Quality : Fair 48 km ( 30 miles) WNW (298 degrees) of Punta Gorda, CA 51 km ( 32 miles) WNW (288 degrees) of Petrolia, CA 52 km ( 32 miles) WSW (256 degrees) of Ferndale, CA 62 km ( 38 miles) WSW (256 degrees) of Fortuna, CA 64 km ( 40 miles) W (267 degrees) of Rio Dell, CA 70 km ( 44 miles) WSW (238 degrees) of Eureka, CA ADDITIONAL EARTHQUAKE PARAMETERS ________________________________ number of phases : 130 rms misfit : 0.16 seconds horizontal location error : 0.7 km vertical location error : 0.9 km maximum azimuthal gap : 242 degrees distance to nearest station : 45. km event ID: 40123127 EDIS-05-21-01 1759 PDT --------------------------------------------------------- To update or terminate your subscription to this email service visit our webpage at http://www.incident.com/edismail.html. EDIS is operated by the Governor's Office of Emergency Services, State of California. This email relay is offered by incident.com as a public service. Because of the complexity of this system and its dependence on other systems, we cannot be responsible for delays or failures in transmission. ---------------------------------------------------------
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