2025-12-03 01:53:28 (M4.0) Near the coast of Bio-Bio, Chile -36.1 -73.8 (90be5)

M4.0 Earthquake - Near the coast of Bio-Bio, Chile

Preliminary Report

Magnitude	4.0
Date-Time	Universal Time (UTC): 3 Dec 2025 01:53:28 Time near the Epicenter (1): 2 Dec 2025 21:53:28 Time in your area (1): 2 Dec 2025 17:53:28
Location	36.148S 73.813W
Depth	36 km
Distances	89.5 km (55.5 mi) NW of Talcahuano, Chile 92.9 km (57.6 mi) NW of Tomé, Chile 98.5 km (61.1 mi) NW of Penco, Chile 101.8 km (63.1 mi) NW of Concepción, Chile 111.3 km (69.0 mi) NW of Chiguayante, Chile
Location Uncertainty	Horizontal: 8.6 km; Vertical 16.7 km
Parameters	Nph = 30; Dmin = 220.3 km; Rmss = 0.47 seconds; Gp = 200° Version =
Event ID	us 6000rs4c

(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
National Earthquake Information Center
U.S. Geological Survey


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