2025-10-02 02:20:09 (M3.4) Idaho-Montana border region 45.6 -113.6 (90be5)

M3.4 Earthquake - Idaho-Montana border region

Preliminary Report

Magnitude	3.4
Date-Time	Universal Time (UTC): 2 Oct 2025 02:20:10 Time near the Epicenter (1): 1 Oct 2025 20:20:10 Time in your area (1): 1 Oct 2025 18:20:10
Location	45.642N 113.644W
Depth	22 km
Distances	15.3 km (9.5 mi) W of Wisdom, Montana 95.1 km (59.0 mi) WSW of Butte, Montana 139.4 km (86.4 mi) S of Missoula, Montana 163.2 km (101.2 mi) SW of Helena, Montana 203.1 km (125.9 mi) W of Bozeman, Montana
Location Uncertainty	Horizontal: 1.6 km; Vertical 6.7 km
Parameters	Nph = 45; Dmin = 12.7 km; Rmss = 0.59 seconds; Gp = 24° Version =
Event ID	us 6000re4e

(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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