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 #5: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro quarry occurred at 12:30:52 PM (PST) on Tuesday, December 9, 2025.
The magnitude 1.0 event (a probable quarry explosion) occurred 2 km (1 miles) ESE of Home Gardens, CA.
The hypocentral depth is -0.44 km (-0.30 miles).
| Magnitude | 1.0 - local magnitude (Ml) |
| Time | Tuesday, December 9, 2025 at 12:30:52 PM (PST) Tuesday, December 9, 2025 at 20:30:52 (UTC) |
| Distance from |
Home Gardens, CA - 2 km (1 miles) ESE (119 degrees) Corona, CA - 6 km (4 miles) E (90 degrees) Norco, CA - 8 km (5 miles) SSE (148 degrees) Pedley, CA - 12 km (7 miles) SSW (192 degrees) Riverside, CA - 13 km (8 miles) SW (229 degrees) |
| Coordinates | 33 deg. 52.2 min. N (33.870N), 117 deg. 30.2 min. W (117.503W) |
| Depth | -0.44 km (-0.30 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=31, Nph=36, Dmin=5.4 km, Rmss=0.22 sec, Erho=0.41 km, Erzz=31.61 km, Gp=47 degrees |
| Event ID# | ci41136247 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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