2025-12-31 20:36:21 UPDATED: (M4.0) Southern Alaska 60.0 -152.8 (90be5)

M4.0 Earthquake - Southern Alaska

Preliminary Report

Magnitude	4.0
Date-Time	Universal Time (UTC): 31 Dec 2025 20:36:22 Time near the Epicenter (1): 31 Dec 2025 11:36:22 Time in your area (1): 31 Dec 2025 12:36:22
Location	60.048N 152.771W
Depth	101 km
Distances	59.0 km (36.6 mi) W of Happy Valley, Alaska 204.1 km (126.6 mi) SW of Anchorage, Alaska 225.3 km (139.7 mi) SW of Eagle River, Alaska 237.6 km (147.3 mi) SW of Knik-Fairview, Alaska 977.0 km (605.8 mi) WSW of Whitehorse, Canada
Location Uncertainty	Horizontal: 0.0 km; Vertical 1.3 km
Parameters	Nph = 269; Dmin = 11.1 km; Rmss = 0.90 seconds; Gp = 65° Version =
Event ID	ak 2025ztthsw ***This event has been revised.

(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
Alaska Earthquake Center
Geophysical Institute, University of Alaska Fairbanks

https://earthquake.alaska.edu

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