Bulletin: April 2006

U.S. DEPARTMENT OF THE INTERIOR                                                                         NO.  4-06-EXP
GEOLOGICAL SURVEY                                                                                        JUL  3, 2006
ROUTINE MINING SEISMICITY IN THE UNITED STATES APRIL 2006
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 03 18 06 05.0 43.803 N 105.193 W 0 G A 0.8 115 33 WYOMING. ML 3.3 (GS). 60 km (35 miles) SSE of Gillette. 03 20 02 41.2 43.702 N 105.178 W 0 G A 0.7 122 18 WYOMING. ML 3.2 (GS). 70 km (45 miles) SSE of Gillette. 04 20 03 49.3 43.811 N 105.184 W 1 G A 0.9 115 30 WYOMING. ML 3.4 (GS). 60 km (35 miles) SSE of Gillette. 04 20 25 32.8 44.079 N 105.256 W 1 G A 1.0 96 21 WYOMING. ML 3.4 (GS). 30 km (20 miles) SE of Gillette. 08 18 06 05.7 43.762 N 105.129 W 0 G A 0.9 97 36 WYOMING. ML 3.3 (GS). 65 km (40 miles) SSE of Gillette. 09 14 59 44.8 43.624 N 105.434 W 0 G A 0.9 190 14 WYOMING. ML 2.7 (GS). 70 km (45 miles) ENE of Midwest. 09 18 02 04.9 43.786 N 105.211 W 0 G A 0.6 143 16 WYOMING. ML 3.4 (GS). 60 km (35 miles) SSE of Gillette. 11 14 25 01.1 44.140 N 105.246 W 0 G A 0.7 140 16 WYOMING. ML 3.3 (GS). 25 km (15 miles) SE of Gillette. 12 20 03 48.6* 43.710 N 105.204 W 0 G B 1.4 143 12 WYOMING. ML 3.1 (GS). 70 km (45 miles) SSE of Gillette. 12 22 58 21.5* 36.750 N 108.406 W 0 G B 1.6 155 8 NEW MEXICO. ML 2.6 (GS). 15 km (10 miles) W of Farmington. 13 22 06 01.8 40.272 N 107.716 W 0 G A 1.3 141 15 COLORADO. ML 3.1 (GS). 30 km (20 miles) SSW of Craig. 14 18 02 49.6 43.724 N 105.152 W 0 G A 0.9 144 22 WYOMING. ML 3.3 (GS). 70 km (45 miles) SSE of Gillette. 14 20 06 44.8 43.785 N 105.313 W 0 G A 0.6 173 15 WYOMING. ML 3.1 (GS). 60 km (35 miles) SSE of Gillette. 15 00 39 36.7 45.112 N 106.755 W 0 G A 0.8 114 23 EASTERN MONTANA. ML 3.3 (GS). 40 km (25 miles) NNE of Sheridan. 15 20 24 07.2 44.151 N 105.352 W 0 G A 1.0 138 23 WYOMING. ML 3.1 (GS). 20 km (10 miles) SE of Gillette. 19 20 03 34.4 43.684 N 105.249 W 0 G A 0.9 166 20 WYOMING. ML 3.3 (GS). 70 km (45 miles) SSE of Gillette. 21 23 36 41.0 43.700 N 105.089 W 0 G A 1.2 125 17 WYOMING. ML 2.9 (GS). 70 km (45 miles) WSW of Newcastle. 22 19 01 14.2 43.606 N 105.138 W 0 G A 1.1 167 10 WYOMING. ML 3.1 (GS). 80 km (50 miles) WSW of Newcastle. 23 20 00 42.3 43.771 N 105.244 W 0 G A 0.8 116 39 WYOMING. ML 3.5 (GS). 60 km (40 miles) SSE of Gillette. 25 21 10 12.8 43.718 N 105.174 W 1 G A 0.9 121 37 WYOMING. ML 3.3 (GS). 70 km (45 miles) SSE of Gillette. 29 20 05 15.5 43.795 N 105.187 W 0 G A 0.9 45 57 WYOMING. mbLg 3.2 (GS). 60 km (40 miles) SSE of Gillette. 30 18 01 07.6 43.817 N 105.222 W 0 G A 0.8 114 22 WYOMING. ML 3.3 (GS). 60 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.

Routine U.S. Mining Seismicity Home Page | Goal and Scope of the Bulletin | Evidence used in Identifying Routine Mining Seismicity | Explanation of Catalog Listings | Mining Seismicity Source Regions