2017-09-25 08:44:42 UPDATED: (M3.7) western Montana 46.9 -112.5 (90be5)

M3.7 - western Montana

Preliminary Earthquake Report

Magnitude	3.7
Date-Time	25 Sep 2017 08:44:43 UTC 25 Sep 2017 02:44:43 near epicenter 25 Sep 2017 00:44:43 standard time in your timezone
Location	46.877N 112.531W
Depth	11 km
Distances	13.3 km (8.3 mi) NW of Atlantic City (historical), Montana 49.3 km (30.5 mi) NW of Helena, Montana 97.1 km (60.2 mi) N of Butte, Montana 108.8 km (67.5 mi) N of Butte-Silver Bow (Balance), Montana 111.6 km (69.2 mi) E of Missoula, Montana
Location Uncertainty	Horizontal: 0.5 km; Vertical 0.4 km
Parameters	Nph = 36; Dmin = 4.8 km; Rmss = 0.25 seconds; Gp = 77° Version = 3
Event ID	mb 80257564 ***This event supersedes event US2000au7c.

For updates, maps, and technical information
see: Event Page or USGS Earthquake Hazards Program
Montana Regional Seismic Network
Montana Bureau of Mines and Geology
http://mbmgquake.mtech.edu


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