U.S. DEPARTMENT OF THE INTERIOR NO. 8-177-EXP GEOLOGICAL SURVEY JUN 25, 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 APR 2008 02 20 09 07.7 43.777 N 105.262 W 0 G 4.8 A 1.0 44 38 WYOMING. ML 3.3 (GS). 60 km (35 miles) SSE of Gillette. 02 21 00 12.4 43.796 N 105.329 W 0 G A 1.2 50 31 WYOMING. ML 3.1 (GS). 55 km (35 miles) SSE of Gillette. 04 19 26 55.5* 44.133 N 105.450 W 0 G B 1.6 103 13 WYOMING. ML 2.8 (GS). 20 km (10 miles) SSE of Gillette. 05 21 30 59.9 43.539 N 105.230 W 0 G A 0.7 128 18 WYOMING. ML 2.9 (GS). 85 km (55 miles) SSE of Gillette. 06 19 58 53.8 43.644 N 105.250 W 0 G A 1.0 122 12 WYOMING. ML 2.8 (GS). 75 km (45 miles) SSE of Gillette. 08 20 05 13.6 43.839 N 105.242 W 0 G A 1.0 51 30 WYOMING. ML 3.1 (GS). 55 km (35 miles) SSE of Gillette. 09 13 26 18.1 43.791 N 105.267 W 0 G A 0.6 69 24 WYOMING. ML 3.1 (GS). 60 km (35 miles) SSE of Gillette. 09 22 09 52.5 40.045 N 107.660 W 0 G A 1.3 54 20 COLORADO. ML 2.7 (GS). 25 km (15 miles) E of Meeker. 12 21 00 59.4 43.708 N 105.236 W 0 G A 0.8 51 51 WYOMING. ML 3.3 (GS). 70 km (45 miles) SSE of Gillette. 14 21 07 03.3 43.780 N 105.255 W 0 G A 0.9 51 41 WYOMING. ML 3.2 (GS). 60 km (35 miles) SSE of Gillette. 14 22 23 08.5 44.429 N 105.361 W 0 G A 1.2 59 26 WYOMING. ML 3.0 (EXP). 20 km (10 miles) NE of Gillette. 16 20 02 32.5 43.801 N 105.231 W 0 G A 0.9 51 32 WYOMING. ML 3.2 (GS). 60 km (35 miles) SSE of Gillette. 18 13 49 55.6? 43.80 N 105.47 W 0 G C 1.2 117 5 WYOMING. ML 2.5 (GS). 55 km (35 miles) S of Gillette. 18 20 12 19.5 43.765 N 105.288 W 0 G A 1.1 70 20 WYOMING. ML 2.9 (GS). 60 km (40 miles) SSE of Gillette. 18 23 30 50.0 45.247 N 106.799 W 0 G A 1.2 101 15 EASTERN MONTANA. ML 2.3 (GS). 50 km (30 miles) NNE of Sheridan. 18 23 32 51.4 43.497 N 105.134 W 0 G A 1.1 113 15 WYOMING. ML 2.6 (GS). 85 km (55 miles) NNE of Douglas. 19 18 01 13.5 43.785 N 105.236 W 0 G A 0.9 51 28 WYOMING. ML 3.1 (GS). 60 km (35 miles) SSE of Gillette. 19 20 06 26.0 43.741 N 105.240 W 0 G A 0.9 51 38 WYOMING. ML 3.2 (GS). 65 km (40 miles) SSE of Gillette. 22 18 01 13.4 43.706 N 105.217 W 0 G A 0.8 74 20 WYOMING. ML 3.1 (GS). 70 km (45 miles) SSE of Gillette. 25 17 45 23.5 43.475 N 105.332 W 0 G A 1.3 50 14 WYOMING. ML 3.1 (GS). 75 km (50 miles) E of Midwest. 25 23 03 37.3* 43.048 N 104.952 W 0 G B 0.8 193 6 WYOMING. ML 2.7 (GS). 50 km (30 miles) NE of Douglas. 26 20 06 35.0 43.758 N 105.268 W 0 G A 1.0 51 35 WYOMING. ML 3.2 (GS). 60 km (40 miles) SSE of Gillette. 27 18 17 30.1 43.677 N 105.193 W 0 G A 1.0 186 21 WYOMING. ML 3.3 (GS). 75 km (45 miles) SSE of Gillette. 27 20 35 57.5* 44.371 N 104.998 W 0 G B 0.9 203 6 WYOMING. ML 2.7 (GS). 40 km (25 miles) ENE of Gillette. 28 20 04 33.0 43.817 N 105.214 W 0 G A 0.8 51 42 WYOMING. ML 3.3 (GS). 55 km (35 miles) SSE of Gillette. 28 22 35 15.8* 43.277 N 105.034 W 0 G B 1.4 191 11 WYOMING. ML 2.6 (GS). 65 km (40 miles) NNE of Douglas. 30 18 07 23.2 43.755 N 105.199 W 0 G A 1.1 51 50 WYOMING. ML 3.3 (GS). 65 km (40 miles) SSE of Gillette.