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)
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)|
|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|
|Additional Information|| Map
For more information, see https://earthquake.usgs.gov
US and World - USGS/NEIC = National Earthquake Information Center
Northern California - UCB = University of California, Berkeley
Southern California - Caltech = California Institute of Technology
Nevada - UNR = University of Nevada, Reno
Offshore = West Coast & Alaska Tsunami Warning Center
...all members of the Advanced National Seismic System (ANSS)