Recent Earthquakes in California and Nevada
== PRELIMINARY EARTHQUAKE REPORT ==
Southern California Seismic Network: a cooperative project of
U.S. Geological Survey, Pasadena California
Caltech Seismological Laboratory, Pasadena, California
Version #7: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro earthquake occurred at 8:08:46 PM (PDT) on Sunday, August 24, 2025.
The magnitude 0.5 event occurred 4 km (3 miles) NW of Diamond Bar, CA.
The hypocentral depth is 9 km ( 6 miles).
| Magnitude | 0.5 - local magnitude (Ml) |
| Time | Sunday, August 24, 2025 at 8:08:46 PM (PDT) Monday, August 25, 2025 at 3:08:46 (UTC) |
| Distance from |
Diamond Bar, CA - 4 km (3 miles) NW (322 degrees) Walnut, CA - 5 km (3 miles) NNE (31 degrees) Charter Oak, CA - 5 km (3 miles) S (172 degrees) Covina, CA - 6 km (4 miles) SE (127 degrees) San Dimas, CA - 6 km (4 miles) SSW (208 degrees) |
| Coordinates | 34 deg. 3.5 min. N (34.058N), 117 deg. 50.3 min. W (117.838W) |
| Depth | 9.32 km (5.80 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=12, Nph=20, Dmin=4.7 km, Rmss=0.15 sec, Erho=0.53 km, Erzz=0.42 km, Gp=202 degrees |
| Event ID# | ci41273816 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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