Recent Earthquakes 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 event has been reviewed by a seismologist.
A micro earthquake occurred at 9:56:40 PM (PDT) on Monday, September 15, 2025.
The magnitude 0.9 event occurred 12 km (7 miles) S of Ridgemark, CA.
The hypocentral depth is 3 km ( 2 miles).
| Magnitude | 0.9 - duration magnitude (Md) |
| Time | Monday, September 15, 2025 at 9:56:40 PM (PDT) Tuesday, September 16, 2025 at 4:56:40 (UTC) |
| Distance from |
Ridgemark, CA - 12 km (7 miles) S (184 degrees) Hollister, CA - 16 km (10 miles) S (172 degrees) Chualar, CA - 20 km (12 miles) NE (41 degrees) San Juan Bautista, CA - 21 km (13 miles) SE (137 degrees) Gonzales, CA - 23 km (14 miles) NNE (16 degrees) |
| Coordinates | 36 deg. 42.3 min. N (36.705N), 121 deg. 22.5 min. W (121.375W) |
| Depth | 2.52 km (1.60 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=16, Nph=21, Dmin=2.5 km, Rmss=0.12 sec, Erho=0.26 km, Erzz=0.59 km, Gp=61 degrees |
| Event ID# | nc75238277 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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