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 6:47:42 PM (PST) on Tuesday, February 18, 2025.
The magnitude 1.3 event occurred 10 km (6 miles) SSW of Brentwood, CA.
The hypocentral depth is 18 km (11 miles).


Magnitude 1.3 - duration magnitude (Md)
Time Tuesday, February 18, 2025 at 6:47:42 PM (PST)
Wednesday, February 19, 2025 at 2:47:42 (UTC)
Distance from Brentwood, CA - 10 km (6 miles) SSW (209 degrees)
Blackhawk, CA - 12 km (7 miles) ENE (75 degrees)
Byron, CA - 13 km (8 miles) W (260 degrees)
Diablo, CA - 16 km (10 miles) E (85 degrees)
Knightsen, CA - 17 km (10 miles) SW (216 degrees)
Coordinates 37 deg. 50.9 min. N (37.848N), 121 deg. 46.8 min. W (121.780W)
Depth 18.41 km (11.40 miles)
Quality Good
Location Quality Parameters Nst=21, Nph=30, Dmin=3.6 km, Rmss=0.17 sec, Erho=0.36 km, Erzz=0.62 km, Gp=67 degrees
Event ID# nc75135972
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