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Earthquake Hazards Program

Magnitude 1.7 WESTERN MONTANA

2009 November 07 20:49:31 UTC

Preliminary Earthquake Report

Magnitude 1.7
Date-Time 2009 11 07 20:49:31 UTC
Time of Earthquake in other Time Zones
Location 46.90N 112.11W
Depth 0.0 kilometers
Region WESTERN MONTANA
Distances 35 km (20 miles) N of HELENA, Montana
90 km (55 miles) SW of Great Falls, Montana
100 km (60 miles) WNW of White Sulphur Springs, Montana
105 km (65 miles) NE of Anaconda, Montana
Location Quality Error estimate: horizontal +/- 0.4 km; depth fixed by location program
Location Quality
Parameters
Nst=9, Nph=9, Dmin=16 km, Rmss=0.12 sec, Gp=194.4 degrees
Source
Event ID mb21376

Earthquake Location

Earthquake Location

 


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