U.S. DEPARTMENT OF THE INTERIOR NO. 4-13-EXP GEOLOGICAL SURVEY JUN 18, 2013 ROUTINE MINING SEISMICITY IN THE UNITED STATES APRIL 2013 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 02 19 09 35.2? 43.07 N 104.80 W 0 G C 2.1 229 9 WYOMING. ML 3.4 (GS). 59 km (37 miles) NE of Douglas. 02 20 05 25.4 43.793 N 105.230 W 0 G A 1.1 50 20 WYOMING. ML 3.2 (GS). 60 km (37 miles) SSE of Gillette. 04 20 08 21.5 43.779 N 105.268 W 0 G A 1.1 26 79 WYOMING. ML 3.9 (GS). 59 km (37 miles) SSE of Gillette. 04 21 06 00.5? 43.78 N 105.34 W 0 G C 0.4 201 5 WYOMING. ML 2.6 (GS). 51 km (32 miles) SSE of Gillette. 05 19 05 16.1 43.612 N 105.209 W 0 G A 1.4 78 13 WYOMING. ML 3.3 (GS). 79 km (49 miles) SSE of Gillette. 06 20 02 34.7 43.782 N 105.165 W 0 G A 0.6 52 50 WYOMING. ML 3.1 (GS). 63 km (39 miles) SSE of Gillette. 07 19 20 54.9 43.576 N 105.121 W 0 G A 1.4 83 26 WYOMING. ML 3.2 (GS). 80 km (50 miles) WSW of Newcastle. 10 22 19 39.9 33.683 N 87.278 W 0 G A 1.5 62 29 ALABAMA. mbLg 2.9 (GS). 16 km (10 miles) S of Jasper. 12 21 59 51.7 43.603 N 105.284 W 0 G A 1.0 76 11 WYOMING. ML 2.9 (GS). 78 km (49 miles) SSE of Gillette. 13 19 16 36.9 43.598 N 105.228 W 0 G A 0.9 78 22 WYOMING. ML 3.0 (GS). 77 km (48 miles) SSE of Gillette. 13 19 43 31.9 44.436 N 105.436 W 0 G A 0.6 120 21 WYOMING. ML 2.9 (GS). 17 km (11 miles) NNE of Gillette. 14 15 20 58.1 43.762 N 105.220 W 0 G A 0.5 72 26 WYOMING. ML 3.4 (GS). 62 km (39 miles) SSE of Gillette. 16 19 01 31.2 43.824 N 105.252 W 0 G A 1.0 31 50 WYOMING. ML 3.4 (GS). 56 km (35 miles) SSE of Gillette. 20 18 08 30.8 43.786 N 105.241 W 0 G A 0.9 33 76 WYOMING. ML 3.4 (GS). 60 km (37 miles) SSE of Gillette. 21 18 04 19.5 43.838 N 105.228 W 0 G A 0.9 29 58 WYOMING. ML 3.5 (GS). 53 km (33 miles) SSE of Gillette. 22 22 31 32.0* 41.084 N 113.056 W 0 G B 1.4 103 7 UTAH. ML 1.9 (GS). 85 km (53 miles) SSE of Park Valley. 25 23 17 19.1* 45.968 N 106.838 W 0 G B 0.7 97 6 EASTERN MONTANA. ML 2.8 (GS). 19 km (12 miles) WNW of Colstrip. 28 18 59 50.1* 43.612 N 104.990 W 0 G B 2.0 86 27 WYOMING. ML 3.6 (GS). 69 km (43 miles) WSW of Newcastle. 30 18 09 31.5 43.736 N 105.264 W 0 G A 1.0 26 68 WYOMING. ML 3.5 (GS). 63 km (39 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.