Recent Earthquakes in California and Nevada
== PRELIMINARY EVENT REPORT ==
U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California
Version #2: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro quarry occurred at 10:01:49 AM (PST) on Thursday, March 5, 2026.
The magnitude 2.1 event (a probable quarry explosion) occurred 6 km (3 miles) SE of Napa, CA.
The hypocentral depth is -0.16 km (-0.10 miles).
| Magnitude | 2.1 - duration magnitude (Md) |
| Time | Thursday, March 5, 2026 at 10:01:49 AM (PST) Thursday, March 5, 2026 at 18:01:49 (UTC) |
| Distance from |
Napa, CA - 6 km (3 miles) SE (136 degrees) Green Valley, CA - 7 km (4 miles) W (277 degrees) American Canyon, CA - 10 km (6 miles) N (10 degrees) Vallejo, CA - 16 km (10 miles) N (358 degrees) Fairfield, CA - 18 km (11 miles) W (274 degrees) |
| Coordinates | 38 deg. 15.7 min. N (38.261N), 122 deg. 14.5 min. W (122.241W) |
| Depth | -0.16 km (-0.10 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=12, Nph=12, Dmin=3.1 km, Rmss=0.14 sec, Erho=0.37 km, Erzz=31.61 km, Gp=72 degrees |
| Event ID# | nc75323107 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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