Bulletin: October 2011
U.S. DEPARTMENT OF THE INTERIOR NO. 10-11-EXP
GEOLOGICAL SURVEY DEC 19, 2011
ROUTINE MINING SEISMICITY IN THE UNITED STATES
OCTOBER 2011
ORIGIN TIME GEOGRAPHIC DEPTH MAGNITUDE Q SD GAP NO. F-E REGION, CONTRIBUTED MAGNITUDES AND COMMENTS
UTC COORDINATES GS STA
DAY HR MN SEC LAT LONG mb MS USED
01 21 10 33.2 43.472 N 104.572 W 0 G A 1.0 143 10 WYOMING. ML 2.6 (GS). 52 km (32 miles) SW of Newcastle.
03 19 14 15.5 43.979 N 105.131 W 0 G A 1.2 62 19 WYOMING. ML 3.2 (GS). 46 km (28 miles) SE of Gillette.
03 23 40 01.6 43.669 N 105.283 W 0 G A 0.9 75 18 WYOMING. mbLg 2.4 (GS). 71 km (44 miles) SSE of
Gillette.
04 19 29 06.7 43.775 N 105.216 W 0 G A 1.2 116 22 WYOMING. ML 3.2 (GS). 62 km (38 miles) SSE of Gillette.
08 22 39 51.7 45.787 N 107.020 W 0 G A 0.9 72 20 EASTERN MONTANA. ML 2.8 (GS). 33 km (20 miles) WSW of
Colstrip.
11 19 04 26.2 43.594 N 105.146 W 0 G A 1.6 81 24 WYOMING. ML 3.2 (GS). 81 km (50 miles) WSW of Newcastle.
11 19 54 49.2 44.093 N 105.280 W 0 G A 0.9 53 45 WYOMING. ML 3.1 (GS). 29 km (18 miles) SE of Gillette.
11 20 49 24.9 45.925 N 106.462 W 0 G A 0.7 80 13 EASTERN MONTANA. ML 2.8 (GS). 14 km (8 miles) ENE of
Colstrip.
12 18 09 21.1 43.714 N 105.133 W 0 G A 1.5 70 20 WYOMING. ML 3.0 (GS). 71 km (44 miles) SSE of Gillette.
17 18 12 38.4 43.774 N 105.219 W 0 G A 1.1 71 23 WYOMING. ML 3.1 (GS). 62 km (38 miles) SSE of Gillette.
18 19 17 56.3 45.166 N 106.826 W 0 G A 1.5 65 46 EASTERN MONTANA. ML 3.1 (GS). 42 km (26 miles) NNE of
Sheridan.
20 23 17 39.4* 43.512 N 104.751 W 0 G B 1.3 185 9 WYOMING. ML 2.6 (GS). 58 km (36 miles) SW of Newcastle.
23 20 10 46.6 43.623 N 105.206 W 0 G A 1.1 123 12 WYOMING. mbLg 3.0 (GS). 76 km (47 miles) SSE of
Gillette.
24 18 03 01.8 43.666 N 105.218 W 0 G A 1.5 97 24 WYOMING. ML 3.2 (GS). 74 km (46 miles) SSE of Gillette.
25 19 09 23.9* 43.655 N 105.113 W 0 G B 1.4 219 14 WYOMING. ML 3.2 (GS). 77 km (48 miles) WSW of Newcastle.
25 21 59 54.1 43.566 N 105.244 W 0 G A 1.0 126 14 WYOMING. mbLg 2.9 (GS). 85 km (53 miles) SSE of
Gillette.
26 21 47 52.3 45.854 N 106.702 W 0 G A 1.0 110 11 EASTERN MONTANA. mbLg 2.8 (GS). 7 km (4 miles) WSW of
Colstrip.
28 18 13 18.8 43.785 N 105.210 W 0 G A 1.4 71 26 WYOMING. ML 3.2 (GS). 61 km (38 miles) SSE of Gillette.
For origin times after September 30, 2002, USGS computations of hypocenters and magnitudes for routine mining events are listed in this publication only for exceptionally large events and for events that are also listed in the Reviewed Event Event Bulletins (REB) of the International Data Center of the United Nations' Comprehensive Nuclear-Test-Ban Treaty Organization.
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