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 is a computer-generated message. This event has not yet been reviewed by a seismologist.
A micro earthquake occurred at 3:32:03 PM (PDT) on Monday, August 18, 2025.
The magnitude 1.1 event occurred 6 km (4 miles) N (7 degrees) of Yorba Linda, CA.
The hypocentral depth is 14 km ( 8 miles).
| Magnitude | 1.1 - local magnitude (Ml) |
| Time | Monday, August 18, 2025 at 3:32:03 PM (PDT) Monday, August 18, 2025 at 22:32:03 (UTC) |
| Distance from |
Yorba Linda, CA - 6 km (4 miles) N (7 degrees) Chino Hills, CA - 7 km (4 miles) SW (217 degrees) Brea, CA - 9 km (6 miles) ENE (72 degrees) Rowland Heights, CA - 10 km (6 miles) ESE (112 degrees) Placentia, CA - 10 km (6 miles) NE (38 degrees) |
| Coordinates | 33 deg. 56.5 min. N (33.942N), 117 deg. 48.3 min. W (117.805W) |
| Depth | 13.75 km (8.50 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=32, Nph=56, Dmin=1.6 km, Rmss=0.18 sec, Erho=0.29 km, Erzz=0.41 km, Gp=80 degrees |
| Event ID# | ci40402290 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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