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 #4: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro earthquake occurred at 0:59:00 AM (PDT) on Monday, April 20, 2026.
The magnitude 0.9 event occurred 6 km (4 miles) ESE of Ontario, CA.
The hypocentral depth is 11 km ( 7 miles).
| Magnitude | 0.9 - local magnitude (Ml) |
| Time | Monday, April 20, 2026 at 0:59:00 AM (PDT) Monday, April 20, 2026 at 7:59:00 (UTC) |
| Distance from |
Ontario, CA - 6 km (4 miles) ESE (117 degrees) Mira Loma, CA - 6 km (4 miles) NW (309 degrees) Glen Avon, CA - 8 km (5 miles) WNW (283 degrees) Pedley, CA - 10 km (6 miles) NW (304 degrees) Chino, CA - 11 km (7 miles) E (81 degrees) |
| Coordinates | 34 deg. 1.7 min. N (34.028N), 117 deg. 34.2 min. W (117.570W) |
| Depth | 10.72 km (6.70 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=47, Nph=79, Dmin=9.7 km, Rmss=0.13 sec, Erho=0.16 km, Erzz=0.27 km, Gp=56 degrees |
| Event ID# | ci41445472 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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