Bulletin: April 2009
U.S. DEPARTMENT OF THE INTERIOR NO. 4-09-EXP
GEOLOGICAL SURVEY JUN 24, 2009
ROUTINE MINING SEISMICITY IN THE UNITED STATES
APRIL 2009
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 16 18.6 43.796 N 105.149 W 0 G A 2.3 52 39 WYOMING. ML 3.4 (GS). 60 km (40 miles) SSE of Gillette.
04 18 59 46.3 43.792 N 105.193 W 0 G A 0.9 71 47 WYOMING. ML 3.3 (GS). 60 km (40 miles) SSE of Gillette.
05 22 03 42.7 40.129 N 107.694 W 0 G A 1.0 114 19 COLORADO. ML 2.8 (GS). 20 km (10 miles) ENE of Meeker.
06 18 03 37.5 43.801 N 105.246 W 0 G A 0.9 51 47 WYOMING. ML 3.3 (GS). 60 km (35 miles) SSE of Gillette.
06 20 12 39.1 43.693 N 105.256 W 0 G A 0.9 51 42 WYOMING. ML 3.2 (GS). 70 km (45 miles) SSE of Gillette.
08 18 06 56.1 43.810 N 105.257 W 0 G A 1.0 51 40 WYOMING. ML 3.2 (GS). 60 km (35 miles) SSE of Gillette.
11 16 07 47.4* 44.039 N 104.833 W 0 G B 1.7 180 15 WYOMING. ML 2.7 (GS). 55 km (35 miles) WNW of Newcastle.
12 00 03 35.7 43.706 N 105.228 W 0 G A 0.8 97 22 WYOMING. ML 2.8 (GS). 70 km (40 miles) SSE of Gillette.
12 18 01 36.7* 43.646 N 105.324 W 0 G B 1.3 123 12 WYOMING. ML 2.7 (GS). 75 km (45 miles) SSE of Gillette.
12 18 49 22.4 43.720 N 105.367 W 0 G A 0.9 121 12 WYOMING. ML 3.0 (GS). 65 km (40 miles) S of Gillette.
13 17 28 07.4 41.721 N 110.687 W 0 G A 0.9 138 21 WYOMING. ML 2.2 (GS). 55 km (35 miles) NNE of Evanston.
13 19 05 00.7 43.591 N 105.129 W 0 G A 2.0 82 27 WYOMING. ML 3.2 (GS). 80 km (50 miles) WSW of Newcastle.
18 22 26 04.4* 44.467 N 105.421 W 0 G B 1.3 173 12 WYOMING. ML 3.0 (GS). 20 km (15 miles) NNE of Gillette.
20 18 03 02.4 43.760 N 105.189 W 0 G A 0.9 51 46 WYOMING. ML 3.4 (GS). 65 km (40 miles) SSE of Gillette.
21 18 08 09.1 43.744 N 105.245 W 0 G A 1.1 51 41 WYOMING. ML 3.3 (GS). 65 km (40 miles) SSE of Gillette.
22 22 19 44.3 40.106 N 107.922 W 0 G A 0.8 123 18 COLORADO. ML 2.6 (GS). NEAR Meeker.
23 06 23 49.3 40.445 N 106.884 W 1 G A 0.9 71 26 COLORADO. ML 2.9 (GS). NEAR Steamboat Springs.
25 18 23 34.0 43.817 N 105.167 W 0 G A 1.1 52 40 WYOMING. ML 3.4 (GS). 60 km (35 miles) SSE of Gillette.
27 20 04 31.1 43.808 N 105.218 W 0 G A 1.0 51 42 WYOMING. ML 3.2 (GS). 60 km (35 miles) SSE of Gillette.
29 18 19 28.5 44.088 N 105.387 W 0 G A 1.1 95 15 WYOMING. ML 3.0 (GS). 25 km (15 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.
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