Recent Earthquakes in California and Nevada


== PRELIMINARY EARTHQUAKE REPORT ==

U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California


Version #0: This report supersedes any earlier reports of this event. This is a computer-generated message. This event has not yet been reviewed by a seismologist.

A micro earthquake occurred at 5:10:27 AM (PDT) on Friday, October 3, 2025.
The magnitude 1.0 event occurred 16 km (10 miles) SSE of Livermore, CA.
The hypocentral depth is 9 km ( 5 miles).


Magnitude 1.0 - duration magnitude (Md)
Time Friday, October 3, 2025 at 5:10:27 AM (PDT)
Friday, October 3, 2025 at 12:10:27 (UTC)
Distance from Livermore, CA - 16 km (10 miles) SSE (147 degrees)
Pleasanton, CA - 21 km (13 miles) ESE (122 degrees)
East Foothills, CA - 24 km (15 miles) NNE (33 degrees)
Milpitas, CA - 26 km (16 miles) NE (54 degrees)
Alum Rock, CA - 26 km (16 miles) NNE (32 degrees)
Coordinates 37 deg. 33.8 min. N (37.563N), 121 deg. 40.2 min. W (121.671W)
Depth 8.58 km (5.30 miles)
Quality Good
Location Quality Parameters Nst=8, Nph=8, Dmin=9.1 km, Rmss=0.06 sec, Erho=0.41 km, Erzz=1.91999996 km, Gp=70 degrees
Event ID# nc75244291
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For more information, see https://earthquake.usgs.gov

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