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 4:28:00 PM (PDT) on Wednesday, September 17, 2025.
The magnitude 1.6 event occurred 15 km (10 miles) S of Ridgemark, CA.
The hypocentral depth is 5 km ( 3 miles).
| Magnitude | 1.6 - duration magnitude (Md) |
| Time | Wednesday, September 17, 2025 at 4:28:00 PM (PDT) Wednesday, September 17, 2025 at 23:28:00 (UTC) |
| Distance from |
Ridgemark, CA - 15 km (10 miles) S (176 degrees) Chualar, CA - 19 km (12 miles) NE (52 degrees) Hollister, CA - 20 km (12 miles) SSE (168 degrees) Gonzales, CA - 20 km (13 miles) NNE (24 degrees) San Juan Bautista, CA - 25 km (16 miles) SE (139 degrees) |
| Coordinates | 36 deg. 40.4 min. N (36.674N), 121 deg. 21.2 min. W (121.353W) |
| Depth | 4.65 km (2.90 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=10, Nph=10, Dmin=3.8 km, Rmss=0.17 sec, Erho=0.78 km, Erzz=1.33000004 km, Gp=141 degrees |
| Event ID# | nc75238962 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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