[Geology2] UPDATED: (M4.7) western Montana

M4.7 - western Montana

Preliminary Earthquake Report

Magnitude	4.7
Date-Time	17 Jul 2017 08:49:50 UTC 17 Jul 2017 02:49:50 near epicenter 17 Jul 2017 00:49:50 standard time in your timezone
Location	46.878N 112.538W
Depth	11 km
Distances	13.8 km (8.6 mi) NW of Atlantic City (historical), Montana 49.8 km (30.9 mi) NW of Helena, Montana 97.2 km (60.2 mi) N of Butte, Montana 108.9 km (67.5 mi) N of Butte-Silver Bow (Balance), Montana 111.0 km (68.8 mi) E of Missoula, Montana
Location Uncertainty	Horizontal: 0.6 km; Vertical 0.8 km
Parameters	Nph = 21; Dmin = 21.5 km; Rmss = 0.20 seconds; Gp = 105° Version = 2
Event ID	mb 80232594 ***This event supersedes event US20009ww4.

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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Posted by: Kim Noyes <kimnoyes@gmail.com>

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