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 5:44:34 AM (PDT) on Thursday, August 21, 2025.
The magnitude 1.7 event occurred 16 km (10 miles) S of Ridgemark, CA.
The hypocentral depth is 3 km ( 2 miles).
| Magnitude | 1.7 - duration magnitude (Md) |
| Time | Thursday, August 21, 2025 at 5:44:34 AM (PDT) Thursday, August 21, 2025 at 12:44:34 (UTC) |
| Distance from |
Ridgemark, CA - 16 km (10 miles) S (171 degrees) Chualar, CA - 20 km (12 miles) NE (55 degrees) Hollister, CA - 20 km (12 miles) SSE (164 degrees) Gonzales, CA - 21 km (13 miles) NNE (27 degrees) San Juan Bautista, CA - 26 km (16 miles) SE (137 degrees) |
| Coordinates | 36 deg. 40.4 min. N (36.674N), 121 deg. 20.2 min. W (121.337W) |
| Depth | 2.53 km (1.60 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=26, Nph=26, Dmin=3.8 km, Rmss=0.18 sec, Erho=0.35 km, Erzz=0.99000001 km, Gp=52 degrees |
| Event ID# | nc75226722 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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