Recent Earthquake in California and Nevada

== PRELIMINARY EARTHQUAKE REPORT ==
U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California

Version #2: This report supersedes any earlier reports of this event.
This quake occurred on the Calaveras fault immediately north of the epicenter of the 1984 Morgan Hill M6.2 quake. Earthquakes of this size are not unusual for this segment of the fault. This earthquake was reviewed by David Oppenheimer-USGS. (v01)

A light earthquake occurred at 3:18:22 PM (PST) on Sunday, February 25, 2001.
The magnitude 4.4 event occurred 17 km (11 miles) E (93 degrees) of San Jose City Hall, CA.
The hypocentral depth is 8 km ( 5 miles).


Magnitude 4.4 - local magnitude (Ml)
Time Sunday, February 25, 2001 at 3:18:22 PM (PST)
Sunday, February 25, 2001 at 23:18:22 (UTC)
Distance from San Jose City Hall, CA - 17 km (11 miles) E (93 degrees)
Milpitas, CA - 21 km (13 miles) ESE (120 degrees)
Santa Clara, CA - 23 km (14 miles) E (96 degrees)
Campbell, CA - 23 km (14 miles) ENE (77 degrees)
Coordinates 37 deg. 20.0 min. N (37.333N), 121 deg. 41.9 min. W (121.699W)
Depth 7.8 km (4.8 miles)
Quality Excellent
Location Quality Parameters Nst=250, Nph=250, Dmin=6 km, Rmss=0.06 sec, Erho=0.1 km, Erzz=0.3 km, Gp=39.6 degrees
Event ID# nc51105698