U.S. DEPARTMENT OF THE INTERIOR NO. 8-121-EXP GEOLOGICAL SURVEY APR 30, 2008 ROUTINE MINING SEISMICITY IN THE UNITED STATES 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 FEB 2008 01 19 07 50.9 43.695 N 105.190 W 0 G A 1.1 119 24 WYOMING. ML 3.2 (GS). 70 km (45 miles) SSE of Gillette. 01 21 25 07.0 43.811 N 105.202 W 0 G A 1.0 70 21 WYOMING. ML 3.3 (GS). 60 km (35 miles) SSE of Gillette. 02 19 10 15.1 43.703 N 105.181 W 0 G A 1.2 75 25 WYOMING. ML 3.3 (GS). 70 km (45 miles) SSE of Gillette. 04 19 06 32.7 43.740 N 105.236 W 0 G A 1.0 72 19 WYOMING. ML 3.2 (GS). 65 km (40 miles) SSE of Gillette. 05 19 28 22.8 43.793 N 105.277 W 0 G A 1.0 69 19 WYOMING. ML 3.2 (GS). 60 km (35 miles) SSE of Gillette. 09 21 02 16.0 43.739 N 105.220 W 0 G A 1.0 73 34 WYOMING. ML 3.2 (GS). 65 km (40 miles) SSE of Gillette. 11 21 06 17.7 43.802 N 105.221 W 0 G A 0.9 70 18 WYOMING. ML 3.3 (GS). 60 km (35 miles) SSE of Gillette. 13 22 02 52.7 43.477 N 105.205 W 0 G A 1.0 83 16 WYOMING. ML 3.1 (GS). 80 km (50 miles) N of Douglas. 15 16 01 49.1* 37.864 N 81.485 W 0 G B 1.5 93 6 WEST VIRGINIA. mbLg 2.9 (GS). 30 km (15 miles) WNW of Beckley. 15 20 00 55.7 43.592 N 105.113 W 0 G A 1.0 82 22 WYOMING. ML 3.3 (EXP). 80 km (50 miles) WSW of Newcastle. 15 21 08 56.8 43.736 N 105.207 W 0 G A 1.0 73 28 WYOMING. ML 3.3 (GS). 65 km (40 miles) SSE of Gillette. 16 00 17 29.7* 43.794 N 105.281 W 0 G B 0.9 114 8 WYOMING. ML 2.9 (GS). 60 km (35 miles) SSE of Gillette. 16 21 01 35.9 43.754 N 105.296 W 0 G A 1.0 70 26 WYOMING. ML 3.0 (GS). 60 km (40 miles) SSE of Gillette. 18 21 04 54.6* 44.024 N 105.265 W 0 G B 2.1 99 16 WYOMING. ML 2.7 (GS). 35 km (20 miles) SSE of Gillette. 18 23 00 30.1 43.628 N 105.275 W 0 G A 1.4 51 40 WYOMING. ML 3.0 (GS). 75 km (45 miles) SSE of Gillette. 22 22 07 00.8 43.755 N 105.261 W 0 G A 0.9 51 17 WYOMING. ML 2.9 (GS). 65 km (40 miles) SSE of Gillette. 24 18 15 25.8? 44.08 N 105.43 W 0 G C 1.0 136 5 WYOMING. ML 2.5 (GS). 25 km (15 miles) SSE of Gillette. 24 21 03 11.1 43.812 N 105.213 W 0 G A 0.9 51 36 WYOMING. ML 3.1 (GS). 60 km (35 miles) SSE of Gillette. 27 23 43 15.0 43.725 N 105.257 W 0 G A 0.5 96 18 WYOMING. ML 2.6 (GS). 65 km (40 miles) SSE of Gillette. 28 17 05 35.4 45.180 N 106.824 W 0 G A 1.2 65 24 EASTERN MONTANA. ML 2.8 (GS). 45 km (30 miles) NNE of Sheridan. 29 23 39 15.5 43.817 N 105.209 W 0 G A 1.0 51 34 WYOMING. ML 2.9 (GS). 60 km (35 miles) SSE of Gillette.