U.S. DEPARTMENT OF THE INTERIOR NO. 2-12-EXP GEOLOGICAL SURVEY MAY 1, 2012 ROUTINE MINING SEISMICITY IN THE UNITED STATES FEBRUARY 2012 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 18 06 47.3 43.545 N 105.256 W 0 G A 1.6 127 16 WYOMING. ML 3.1 (GS). 84 km (52 miles) E of Midwest. 01 21 39 37.3 45.180 N 106.878 W 0 G A 0.9 100 10 EASTERN MONTANA. mbLg 2.8 (GS). 43 km (27 miles) N of Sheridan. 02 20 06 40.0 43.804 N 105.262 W 0 G A 1.2 69 19 WYOMING. ML 3.3 (GS). 59 km (37 miles) SSE of Gillette. 03 19 05 45.0 43.835 N 105.176 W 0 G A 1.2 33 33 WYOMING. ML 3.4 (GS). 57 km (35 miles) SSE of Gillette. 05 19 00 51.7 43.563 N 105.422 W 0 G A 1.0 96 12 WYOMING. ML 2.8 (GS). 71 km (44 miles) ENE of Midwest. 06 21 36 35.4 45.907 N 106.820 W 0 G A 0.8 75 11 EASTERN MONTANA. mbLg 2.9 (GS). 16 km (10 miles) W of Colstrip. 07 19 05 30.8 43.785 N 105.251 W 0 G A 1.4 26 31 WYOMING. ML 3.3 (GS). 60 km (37 miles) SSE of Gillette. 07 20 45 47.0* 44.656 N 105.540 W 0 G B 2.6 102 10 WYOMING. ML 2.7 (GS). 41 km (25 miles) N of Gillette. 08 19 42 22.3 43.555 N 105.335 W 0 G A 1.0 58 15 WYOMING. ML 3.1 (GS). 78 km (48 miles) ENE of Midwest. 08 22 00 22.8 43.921 N 105.266 W 0 G A 0.5 76 11 WYOMING. mbLg 2.7 (GS). 44 km (27 miles) SSE of Gillette. 09 17 01 31.1* 41.648 N 110.542 W 0 G B 0.4 81 8 WYOMING. ML 2.0 (GS). 16 km (10 miles) S of Kemmerer. 09 22 36 52.4* 45.998 N 106.490 W 0 G B 2.9 81 11 EASTERN MONTANA. ML 2.8 (GS). 16 km (10 miles) NE of Colstrip. 11 21 01 46.2 43.822 N 105.271 W 0 G A 0.9 68 17 WYOMING. ML 3.5 (GS). 55 km (34 miles) SSE of Gillette. 11 21 02 01.7* 43.226 N 107.157 W 0 G B 1.2 95 8 WYOMING. ML 2.6 (GS). 75 km (47 miles) WSW of Midwest. 13 19 44 58.9 43.782 N 105.195 W 0 G A 1.1 71 12 WYOMING. ML 3.1 (GS). 62 km (38 miles) SSE of Gillette. 13 23 43 47.8 44.515 N 105.314 W 0 G A 1.0 128 10 WYOMING. mbLg 2.7 (GS). 27 km (17 miles) NE of Gillette. 16 19 00 40.4 43.703 N 105.232 W 0 G A 1.3 120 16 WYOMING. ML 3.2 (GS). 69 km (43 miles) SSE of Gillette. 16 20 16 51.0 43.593 N 105.094 W 0 G A 1.4 45 25 WYOMING. ML 3.4 (GS). 77 km (48 miles) WSW of Newcastle. 17 23 36 47.6* 45.237 N 106.900 W 0 G B 1.9 65 15 EASTERN MONTANA. ML 2.6 (GS). 45 km (28 miles) NNE of Sheridan. 20 20 02 45.9 43.482 N 105.105 W 0 G A 1.3 106 12 WYOMING. ML 2.9 (GS). 83 km (52 miles) NNE of Douglas. 21 18 59 51.2* 43.909 N 105.326 W 0 G B 2.3 75 14 WYOMING. ML 3.0 (GS). 45 km (28 miles) SSE of Gillette. 22 12 49 56.9 37.908 N 81.556 W 0 G A 1.1 58 15 WEST VIRGINIA. mbLg 3.2 (GS). 35 km (22 miles) WNW of Beckley. 24 18 26 12.3 44.106 N 105.220 W 0 G A 0.8 95 15 WYOMING. ML 3.1 (GS). 31 km (19 miles) SE of Gillette. 24 19 14 43.1* 43.630 N 105.130 W 0 G B 1.9 127 17 WYOMING. ML 3.2 (GS). 79 km (49 miles) WSW of Newcastle. 24 20 01 13.4 43.510 N 105.248 W 0 G A 1.3 81 13 WYOMING. ML 3.0 (GS). 85 km (53 miles) E of Midwest. 24 23 12 34.3* 44.055 N 105.341 W 0 G B 0.9 126 6 WYOMING. ML 2.7 (GS). 29 km (18 miles) SSE of Gillette. 25 21 28 02.7* 43.522 N 105.660 W 0 G B 1.4 121 10 WYOMING. ML 2.8 (GS). 52 km (32 miles) ENE of Midwest. 26 19 07 51.7 43.710 N 105.206 W 0 G A 1.3 93 16 WYOMING. mbLg 3.0 (GS). 69 km (43 miles) SSE of Gillette. 28 00 32 16.5 43.676 N 105.238 W 0 G A 0.9 150 11 WYOMING. mbLg 2.5 (GS). 72 km (44 miles) SSE of Gillette. 28 19 02 05.8 43.702 N 105.252 W 0 G A 1.1 51 21 WYOMING. ML 3.2 (GS). 69 km (43 miles) SSE of Gillette. 28 20 42 02.1 42.676 N 111.160 W 0 G A 1.5 37 26 SOUTHERN IDAHO. ML 3.1 (GS). 20 km (12 miles) WSW of Afton.