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Southern California Earthquake Data Center

Recent Earthquakes

Recent Earthquakes in California and Nevada

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

Version #3: This report supersedes any earlier reports of this event.
This event has been reviewed by a seismologist.


A micro earthquake occurred at 4:30:00 PM (PDT) on Friday, May 3, 2013.
The magnitude 1.7 event occurred 14 km (8 miles) S of Alder Springs, CA.
The hypocentral depth is 0.3 km (0.2 miles).




Magnitude 1.7 - duration magnitude (Md)
Time Friday, May 3, 2013 at 4:30:00 PM (PDT)
Friday, May 3, 2013 at 23:30:00 (UTC)
Distance from Alder Springs, CA - 14 km (8 miles) S (183 degrees)
Stony Gorge Reservoir, CA - 18 km (11 miles) WSW (251 degrees)
Lake Pillsbury, CA - 24 km (15 miles) NE (55 degrees)
Ukiah, CA - 59 km (36 miles) NE (44 degrees)
Coordinates 39 deg. 31.8 min. N (39.530N), 122 deg. 44.1 min. W (122.734W)
Depth 0.3 km (0.2 miles)
Quality Good
Location Quality Parameters Nst= 20, Nph= 20, Dmin=14 km, Rmss=0.14 sec, Erho=0.3 km, Erzz=1.3 km, Gp=50.4 degrees
Event ID nc71985021
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