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 7:34:52 AM (PDT) on Wednesday, July 30, 2025.
The magnitude 1.6 event occurred 1 km (1 miles) NNW of Pleasant Hill, CA.
The hypocentral depth is 17 km (10 miles).


Magnitude 1.6 - duration magnitude (Md)
Time Wednesday, July 30, 2025 at 7:34:52 AM (PDT)
Wednesday, July 30, 2025 at 14:34:52 (UTC)
Distance from Pleasant Hill, CA - 1 km (1 miles) NNW (329 degrees)
Pacheco, CA - 3 km (2 miles) S (170 degrees)
Waldon, CA - 4 km (2 miles) NNW (341 degrees)
Concord, CA - 5 km (3 miles) W (259 degrees)
Walnut Creek, CA - 6 km (4 miles) N (356 degrees)
Coordinates 37 deg. 57.6 min. N (37.959N), 122 deg. 4.2 min. W (122.070W)
Depth 16.79 km (10.40 miles)
Quality Good
Location Quality Parameters Nst=24, Nph=27, Dmin=8.6 km, Rmss=0.16 sec, Erho=0.48 km, Erzz=0.41 km, Gp=118 degrees
Event ID# nc75216942
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