Preliminary Earthquake Report

Magnitude 2.3 WESTERN MONTANA
2009 November 22 23:38:13 UTC

Magnitude 2.3
Date-Time 2009 11 22 23:38:13 UTC
Time of Earthquake in other Time Zones
Location 44.77N 111.33W
Depth 6.1 kilometers
Region WESTERN MONTANA
Distances 20 km (15 miles) NW of West Yellowstone, Montana
55 km (35 miles) NW of Old Faithful, Wyoming
95 km (60 miles) NE of Dubois, Idaho
210 km (130 miles) SSE of HELENA, Montana
Location Quality Error estimate: horizontal +/- 0.5 km; depth fixed by location program
Location Quality
Parameters
Nst=21, Nph=21, Dmin=9.4 km, Rmss=0.16 sec, Gp=111.6 degrees
Source University of Utah Seismograph Stations
Event ID uu11222338

Earthquake Location

Earthquake Location