2025-04-04 15:37:40 (M3.1) Northern California 38.1 -121.8 (90be5)

M3.1 Earthquake - Northern California

Preliminary Report

Magnitude	3.1
Date-Time	Universal Time (UTC): 4 Apr 2025 15:37:40 Time near the Epicenter (1): 4 Apr 2025 08:37:40 Time in your area (1): 4 Apr 2025 07:37:40
Location	38.137N 121.835W
Depth	24 km
Distances	12.5 km (7.8 mi) WSW of Rio Vista, California 12.9 km (8.0 mi) NNE of Pittsburg, California 14.9 km (9.2 mi) N of Antioch, California 16.4 km (10.1 mi) NE of Bay Point, California 57.6 km (35.7 mi) SSW of Sacramento, California
Location Uncertainty	Horizontal: 0.4 km; Vertical 0.4 km
Parameters	Nph = 78; Dmin = 12.9 km; Rmss = 0.30 seconds; Gp = 79° Version = 2
Event ID	nc 75160067

(1) Nominal Standard Time; local and daylight savings time zone may differ.
For updates, maps, and technical information
see: Event Page or USGS Earthquake Hazards Program
CISN Northern California Management Center
U.S. Geological Survey
Berkeley Seismological Laboratory
http://www.cisn.org/ncmc.html

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