Recent Earthquakes in California and Nevada
== PRELIMINARY EVENT 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 quarry occurred at 11:05:40 AM (PDT) on Thursday, August 28, 2025.
The magnitude 1.6 event (a probable quarry explosion) occurred 7 km (5 miles) SSE of Home Gardens, CA.
The hypocentral depth is -1 km (-0.40 miles).
| Magnitude | 1.6 - local magnitude (Ml) |
| Time | Thursday, August 28, 2025 at 11:05:40 AM (PDT) Thursday, August 28, 2025 at 18:05:40 (UTC) |
| Distance from |
Home Gardens, CA - 7 km (5 miles) SSE (151 degrees) Corona, CA - 10 km (6 miles) SE (125 degrees) Woodcrest, CA - 13 km (8 miles) WSW (239 degrees) Norco, CA - 14 km (9 miles) SSE (154 degrees) Riverside, CA - 16 km (10 miles) SSW (209 degrees) |
| Coordinates | 33 deg. 49.2 min. N (33.819N), 117 deg. 28.9 min. W (117.482W) |
| Depth | -0.64 km (-0.40 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=44, Nph=57, Dmin=3.4 km, Rmss=0.27 sec, Erho=0.36 km, Erzz=31.61 km, Gp=41 degrees |
| Event ID# | ci41277528 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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