U.S. DEPARTMENT OF THE INTERIOR NO. 8-187-EXP GEOLOGICAL SURVEY JUL 5, 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 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. MAY 2008 03 14 19 20.0 43.756 N 105.242 W 0 G A 0.8 51 17 WYOMING. ML 3.0 (GS). 65 km (40 miles) SSE of Gillette. 03 20 46 08.6 43.809 N 105.244 W 0 G A 1.1 50 59 WYOMING. ML 3.3 (GS). 60 km (35 miles) SSE of Gillette. 04 18 03 40.4 43.710 N 105.177 W 0 G A 1.1 121 16 WYOMING. ML 2.8 (GS). 70 km (45 miles) SSE of Gillette. 05 18 07 03.2 43.801 N 105.257 W 0 G A 0.9 51 42 WYOMING. ML 3.3 (GS). 60 km (35 miles) SSE of Gillette. 05 19 03 37.0 43.763 N 105.279 W 0 G A 1.0 62 21 WYOMING. ML 3.0 (GS). 60 km (40 miles) SSE of Gillette. 06 22 10 43.9 41.696 N 108.733 W 0 G A 1.0 59 24 WYOMING. ML 2.5 (GS). 40 km (25 miles) ENE of Rock Springs. 07 13 41 46.0 43.743 N 105.254 W 0 G A 0.8 54 28 WYOMING. ML 3.0 (GS). 65 km (40 miles) SSE of Gillette. 09 18 08 00.2 43.755 N 105.271 W 0 G A 1.1 51 42 WYOMING. ML 3.2 (GS). 60 km (40 miles) SSE of Gillette. 09 20 08 06.2 43.733 N 105.245 W 0 G A 0.8 50 44 WYOMING. ML 3.2 (GS). 65 km (40 miles) SSE of Gillette. 11 20 04 49.7* 43.791 N 105.213 W 0 G B 1.5 81 7 WYOMING. ML 3.1 (GS). 60 km (35 miles) SSE of Gillette. 11 20 22 58.4? 44.46 N 105.00 W 0 G C 0.7 136 5 WYOMING. ML 2.5 (GS). 45 km (25 miles) ENE of Gillette. 15 21 40 40.3 44.276 N 105.404 W 0 G A 0.9 111 18 WYOMING. ML 2.7 (GS). 10 km (5 miles) E of Gillette. 15 22 39 24.7 43.790 N 105.279 W 0 G A 0.5 82 18 WYOMING. ML 2.7 (GS). 60 km (35 miles) SSE of Gillette. 18 20 03 54.6* 43.865 N 105.175 W 0 G B 1.3 138 10 WYOMING. ML 2.8 (GS). 55 km (35 miles) SSE of Gillette. 19 18 34 50.0 43.751 N 105.241 W 0 G A 1.0 72 31 WYOMING. ML 3.2 (GS). 65 km (40 miles) SSE of Gillette. 20 21 31 54.9 43.710 N 105.228 W 0 G A 0.8 74 24 WYOMING. ML 3.1 (GS). 70 km (40 miles) SSE of Gillette. 25 18 02 06.2 43.762 N 105.231 W 0 G A 0.8 51 45 WYOMING. ML 3.3 (GS). 65 km (40 miles) SSE of Gillette. 28 21 14 35.5 40.355 N 109.551 W 0 G A 1.6 91 28 UTAH. ML 2.6 (GS). 10 km (5 miles) S of Vernal. 28 22 18 14.3 43.581 N 105.204 W 0 G A 0.8 110 17 WYOMING. ML 2.7 (GS). 80 km (50 miles) SSE of Gillette. 29 17 45 58.3? 36.21 N 110.18 W 0 G C 1.1 158 5 ARIZONA. ML 2.7 (GS). 55 km (35 miles) NNE of Second Mesa. 29 18 07 39.1 41.784 N 108.624 W 0 G A 1.2 88 16 WYOMING. ML 2.7 (GS). 55 km (35 miles) ENE of Rock Springs. 29 20 12 58.3* 45.178 N 106.891 W 0 G B 0.6 103 9 EASTERN MONTANA. ML 2.9 (GS). 45 km (30 miles) N of Sheridan. 29 20 21 32.6 43.677 N 105.258 W 0 G A 1.2 75 13 WYOMING. ML 2.9 (GS). 70 km (45 miles) SSE of Gillette. 29 22 37 19.8 41.573 N 108.713 W 0 G A 1.3 78 25 WYOMING. ML 2.5 (GS). 40 km (25 miles) E of Rock Springs. JUN 2008 03 00 03 00.2 43.743 N 105.257 W 0 G A 1.1 58 23 WYOMING. ML 3.2 (GS). 65 km (40 miles) SSE of Gillette. 04 21 16 50.6 40.776 N 116.166 W 0 G A 1.0 102 19 NEVADA. ML 2.5 (GS). 35 km (20 miles) W of Elko. 09 20 19 00.6 43.700 N 105.228 W 0 G A 0.5 51 24 WYOMING. ML 3.1 (GS). 65 km (40 miles) SSE of Gillette. 12 23 47 04.9 43.647 N 105.113 W 0 G A 0.9 115 21 WYOMING. ML 3.1 (GS). 75 km (45 miles) WSW of Newcastle. 17 00 25 41.3 43.647 N 105.335 W 0 G A 1.0 53 30 WYOMING. ML 3.0 (GS). 75 km (45 miles) S of Gillette. 23 23 46 06.0 43.766 N 105.238 W 0 G A 0.9 59 19 WYOMING. ML 2.7 (GS). 60 km (40 miles) SSE of Gillette. JUL 2008 02 22 11 33.9 40.224 N 107.821 W 0 G A 0.8 86 16 COLORADO. ML 2.8 (GS). 20 km (15 miles) NNE of Meeker. 03 23 03 15.7 43.802 N 105.267 W 0 G A 1.0 61 28 WYOMING. ML 2.8 (GS). 55 km (35 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.