2017-07-23 06:53:22 UPDATED: (M3.4) western Montana 46.9 -112.5 (90be5)

M3.4 - western Montana

Preliminary Earthquake Report

Magnitude	3.4
Date-Time	23 Jul 2017 06:53:22 UTC 23 Jul 2017 00:53:22 near epicenter 22 Jul 2017 22:53:22 standard time in your timezone
Location	46.855N 112.484W
Depth	18 km
Distances	9.3 km (5.7 mi) NNW of Atlantic City (historical), Montana 45.0 km (27.9 mi) NW of Helena, Montana 94.8 km (58.7 mi) N of Butte, Montana 106.8 km (66.2 mi) N of Butte-Silver Bow (Balance), Montana 114.8 km (71.2 mi) SW of Great Falls, Montana
Location Uncertainty	Horizontal: 0.9 km; Vertical 0.6 km
Parameters	Nph = 30; Dmin = 6.5 km; Rmss = 0.31 seconds; Gp = 58° Version = 4
Event ID	mb 80235364 ***This event supersedes event US20009zyb.

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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