Image
© USGS
Date-Time:
Friday, September 25, 2009 at 15:11:34 UTC

Friday, September 25, 2009 at 09:11:34 AM at epicenter

Location:
45.016°N, 104.207°W

Depth:
4.5 km (2.8 miles)

Distances:
48 km (30 miles) NE (40°) from Hulett, WY

48 km (30 miles) NW (324°) from Belle Fourche, SD

56 km (35 miles) NW (314°) from Fruitdale, SD

69 km (43 miles) N (11°) from Sundance, WY

501 km (311 miles) N (8°) from Fort Collins, CO

591 km (368 miles) N (6°) from Denver, CO

Location Uncertainty:
horizontal +/- 0.5 km (0.3 miles); depth +/- 0.8 km (0.5 miles)

Parameters:
NST= 72, Nph= 72, Dmin=38.4 km, Rmss=0.31 sec, Gp= 14°,
M-type=duration magnitude (Md), Version=2

Source:
Earthquake Studies Office, Montana Bureau of Mines and Geology

Event ID mb9333936