Recent Earthquakes in California and Nevada
== PRELIMINARY EVENT REPORT ==
U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California
Version #3: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro quarry occurred at 12:26:59 PM (PDT) on Friday, July 14, 2023.
The magnitude 1.4 event (a probable quarry explosion) occurred 4 km (3 miles) SE of Napa, CA.
The hypocentral depth is -0.16 km (-0.1 miles).
| Magnitude | 1.4 - duration magnitude (Md) |
| Time | Friday, July 14, 2023 at 12:26:59 PM (PDT) Friday, July 14, 2023 at 19:26:59 (UTC) |
| Distance from |
Napa, CA - 4 km (3 miles) SE (132 degrees) Green Valley, CA - 8 km (5 miles) WNW (285 degrees) American Canyon, CA - 11 km (7 miles) N (6 degrees) Sonoma, CA - 18 km (11 miles) E (97 degrees) Vallejo, CA - 18 km (11 miles) N (357 degrees) |
| Coordinates | 38 deg. 16.2 min. N (38.271N), 122 deg. 14.9 min. W (122.248W) |
| Depth | -0.16 km (-0.1 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=14, Nph=14, Dmin=3.0 km, Rmss=0.11 sec, Erho=0.36 km, Erzz=31.61 km, Gp=67 degrees |
| Event ID# | nc73912986 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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