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 #6: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro earthquake occurred at 0:58:56 AM (PDT) on Monday, July 27, 2026.
The magnitude 0.8 event occurred 5 km (3 miles) NNW of Rancho Cucamonga, CA.
The hypocentral depth is 9 km ( 6 miles).
| Magnitude | 0.8 - local magnitude (Ml) |
| Time | Monday, July 27, 2026 at 0:58:56 AM (PDT) Monday, July 27, 2026 at 7:58:56 (UTC) |
| Distance from |
Rancho Cucamonga, CA - 5 km (3 miles) NNW (339 degrees) Upland, CA - 9 km (5 miles) NNE (31 degrees) Montclair, CA - 13 km (8 miles) NE (41 degrees) Ontario, CA - 13 km (8 miles) NNE (12 degrees) Claremont, CA - 14 km (8 miles) NE (56 degrees) |
| Coordinates | 34 deg. 9.9 min. N (34.165N), 117 deg. 35.9 min. W (117.599W) |
| Depth | 9.29 km (5.80 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=25, Nph=46, Dmin=6.1 km, Rmss=0.15 sec, Erho=0.28 km, Erzz=0.35 km, Gp=68 degrees |
| Event ID# | ci40661954 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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