Bulletin: September 2011
U.S. DEPARTMENT OF THE INTERIOR NO. 9-11-EXP
GEOLOGICAL SURVEY DEC 6, 2011
ROUTINE MINING SEISMICITY IN THE UNITED STATES
SEPTEMBER 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
03 17 14 32.9 44.040 N 105.329 W 0 G A 0.6 97 12 WYOMING. ML 3.0 (GS). 31 km (19 miles) SSE of Gillette.
03 22 47 22.1 45.822 N 106.940 W 0 G A 1.4 94 17 EASTERN MONTANA. ML 2.8 (GS). 26 km (16 miles) WSW of
Colstrip.
04 23 07 19.7 43.624 N 106.229 W 0 G A 1.2 160 13 WYOMING. ML 2.7 (GS). 51 km (32 miles) NNE of Midwest.
04 23 16 44.5 44.034 N 105.022 W 0 G A 1.3 151 15 WYOMING. ML 2.7 (GS). 48 km (30 miles) SE of Gillette.
06 22 21 47.6 45.088 N 106.962 W 0 G A 1.2 111 12 EASTERN MONTANA. ML 2.6 (GS). 32 km (20 miles) N of
Sheridan.
08 19 01 57.4 43.645 N 105.081 W 0 G A 1.7 81 22 WYOMING. ML 3.0 (GS). 73 km (45 miles) WSW of Newcastle.
12 20 28 45.5* 41.112 N 112.704 W 0 G B 2.1 113 7 UTAH. ML 2.0 (GS). 63 km (39 miles) W of Ogden.
15 22 01 48.2 40.708 N 109.471 W 0 G A 0.9 90 19 UTAH. ML 2.9 (GS). ML 2.9 (GS).
15 22 07 06.1* 43.414 N 105.815 W 0 G B 1.1 184 8 WYOMING. ML 2.5 (GS). 38 km (23 miles) E of Midwest.
17 21 03 29.4 43.845 N 105.232 W 0 G A 0.9 85 15 WYOMING. ML 3.0 (GS). 55 km (34 miles) SSE of Gillette.
18 23 10 10.6* 43.221 N 104.700 W 0 G B 1.4 203 7 WYOMING. ML 2.6 (GS). 76 km (47 miles) NE of Douglas.
20 22 30 36.6 43.575 N 105.228 W 0 G A 1.5 51 26 WYOMING. mbLg 2.9 (GS). 83 km (52 miles) SSE of
Gillette.
22 20 04 02.4* 43.845 N 105.343 W 0 G B 2.2 53 23 WYOMING. ML 3.2 (GS). 51 km (32 miles) SSE of Gillette.
24 19 19 03.4 43.569 N 105.145 W 0 G A 0.9 99 18 WYOMING. ML 3.1 (GS). 82 km (51 miles) WSW of Newcastle.
24 21 10 18.7* 43.967 N 105.492 W 0 G B 0.6 205 9 WYOMING. ML 2.8 (GS). 36 km (22 miles) S of Gillette.
25 20 19 07.8* 44.052 N 105.397 W 0 G B 1.5 95 8 WYOMING. mbLg 2.5 (GS). 28 km (17 miles) SSE of
Gillette.
29 19 05 36.3 43.709 N 105.050 W 0 G A 1.6 126 17 WYOMING. ML 3.3 (GS). 71 km (44 miles) SSE of Gillette.
29 21 54 04.8 40.601 N 109.362 W 0 G A 1.2 75 18 UTAH. ML 3.0 (GS). 21 km (13 miles) NE of Vernal.
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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