Bulletin: April 2002
U.S. DEPARTMENT OF THE INTERIOR NO. 4-02-EXP
GEOLOGICAL SURVEY MAY 25, 2002
ROUTINE MINING SEISMICITY IN THE UNITED STATES
APRIL 2002
ORIGIN TIME GEOGRAPHIC DEPTH MAGNITUDE SD GAP NO. F-E REGION, CONTRIBUTED MAGNITUDES AND COMMENTS
UTC COORDINATES GS STA
DAY HR MN SEC LAT LONG mb MS USED
01 01 02 58.8 40.271 N 107.808 W 0 G 1.4 98 17 COLORADO. ML 2.7 (GS). 20 miles (35 km) SW of Craig.
01 21 43 38.6 35.607 N 108.865 W 0 G 1.1 88 9 NEW MEXICO. ML 2.2 (GS). 10 miles (15 km) NW of Gallup.
02 20 02 10.4 41.726 N 108.474 W 0 G 1.3 128 23 WYOMING. ML 3.2 (GS). 40 miles (65 km) ENE of Rock
Springs.
03 19 56 09.7 32.786 N 109.219 W 0 G 0.7 193 11 EASTERN ARIZONA. ML 2.8 (GS). 30 milse (45 km) E of
Safford.
04 23 07 19.5 40.308 N 107.775 W 0 G 0.5 135 10 COLORADO. ML 3.1 (GS). 20 miles (30 km) SW of Craig.
05 23 02 53.0 40.392 N 107.807 W 0 G 0.9 138 15 COLORADO. ML 2.6 (GS). 15 miles (25 km) WNW of Craig.
06 18 13 28.6* 43.580 N 104.855 W 0 G 1.6 149 12 WYOMING. ML 3.0 (GS). 40 miles (60 km) WSW of Newcastle.
08 21 21 44.6 46.726 N 122.793 W 0 G 1.1 117 16 WASHINGTON. ML 2.4 (GS). 10 miles (10 km) E of
Centralia.
09 16 18 23.4 41.780 N 108.683 W 0 G 0.6 86 23 WYOMING. ML 2.6 (GS). 30 miles (50 km) ENE of Rock
Springs.
09 22 04 46.8 40.322 N 107.764 W 0 G 0.7 71 19 COLORADO. ML 3.2 (GS). 15 miles (25 km) SW of Craig.
10 17 06 01.1 41.719 N 110.698 W 0 G 0.2 106 17 WYOMING. ML 1.9 (GS). 35 miles (55 km) NNE of Evanston.
10 18 31 32.3 44.208 N 105.265 W 0 G 1.0 140 20 WYOMING. ML 3.3 (GS). 15 miles (20 km) ESE of Gillette.
10 20 03 40.5 43.824 N 105.152 W 0 G 1.2 143 23 WYOMING. ML 3.2 (GS). 35 miles (60 km) SSE of Gillette.
10 21 34 58.5 46.732 N 122.843 W 0 G 0.4 134 6 WASHINGTON. 5 miles (10 km) ENE of Centralia.
11 21 47 49.5 32.934 N 109.230 W 0 G 0.9 119 7 EASTERN ARIZONA. ML 2.8 (GS). 30 miles (45 km) ENE of
Safford.
12 17 25 39.3 41.804 N 108.682 W 0 G 0.9 82 26 WYOMING. ML 2.6 (GS). 30 miles (50 km) ENE of Rock
Springs.
15 18 03 56.1 43.643 N 105.254 W 0 G 1.0 123 18 WYOMING. ML 3.2 (GS). 45 miles (75 km) SSE of Gillette.
16 18 00 07.7 43.671 N 105.250 W 0 G 0.7 126 20 WYOMING. ML 3.4 (GS). 45 miles (70 km) SSE of Gillette.
16 20 14 57.7 44.231 N 105.351 W 0 G 0.8 102 22 WYOMING. ML 3.2 (GS). 10 miles (15 km) ESE of Gillette.
16 22 48 35.5 32.989 N 109.316 W 0 G 0.6 142 11 EASTERN ARIZONA. ML 2.7 (GS). 25 miles (40 km) ENE of
Safford.
17 20 43 33.2 41.821 N 108.898 W 0 G 0.7 154 13 WYOMING. ML 2.3 (GS). 20 miles (35 km) NE of Rock
Springs.
17 22 23 00.5 46.703 N 122.777 W 0 G 0.6 113 10 WASHINGTON. ML 2.0 (GS). 10 miles (15 km) E of
Centralia.
18 17 27 50.7 41.716 N 108.649 W 0 G 1.0 152 24 WYOMING. ML 3.1 (GS). 30 miles (50 km) ENE of Rock
Springs.
18 20 37 08.2* 44.094 N 105.321 W 0 G 1.3 241 22 WYOMING. ML 3.3 (GS). 15 miles (25 km) SSE of Gillette.
18 20 45 31.5 46.715 N 122.788 W 0 G 1.2 115 10 WASHINGTON. ML 2.3 (GS). 10 miles (15 km) E of
Centralia.
19 20 21 14.1 33.064 N 109.374 W 0 G 0.8 137 13 EASTERN ARIZONA. ML 2.7 (GS). 25 miles (40 km) NE of
Safford.
20 22 18 29.3 41.830 N 108.718 W 0 G 1.1 82 25 WYOMING. ML 2.7 (GS). 30 miles (50 km) ENE of Rock
Springs.
22 21 46 14.2 46.733 N 122.820 W 0 G 0.8 132 7 WASHINGTON. 5 miles (10 km) ENE of Centralia.
23 18 09 12.6 43.760 N 105.080 W 0 G 1.0 108 27 WYOMING. ML 3.4 (GS). 40 miles (70 km) SSE of Gillette.
24 21 59 05.4* 32.514 N 108.998 W 0 G 1.1 212 5 NEW MEXICO. ML 2.7 (GS). 20 miles (35 km) NW of
Lordsburg.
26 22 11 32.0 40.316 N 107.907 W 0 G 0.8 157 14 COLORADO. ML 3.0 (GS). 25 miles (35 km) SW of Craig.
28 21 44 40.5 42.879 N 111.329 W 0 G 0.9 80 20 EASTERN IDAHO. ML 1.8 (GS). 25 miles (35 km) WNW of
Afton.
29 20 28 49.7 41.885 N 108.818 W 0 G 1.1 160 20 WYOMING. ML 2.4 (GS). 30 miles (45 km) NE of Rock
Springs.
30 18 08 01.7 40.366 N 107.788 W 0 G 0.9 152 13 COLORADO. ML 2.5 (GS). 15 miles (25 km) SW of Craig.
30 19 26 40.9 41.113 N 112.851 W 0 G 0.6 75 17 UTAH. ML 1.8 (GS). 45 miles (75 km) W of Ogden.
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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