U.S. DEPARTMENT OF THE INTERIOR NO. 12-99-EXP GEOLOGICAL SURVEY JAN 8, 2000 PROBABLE MINING EXPLOSIONS IN THE UNITED STATES DECEMBER 1999 ORIGIN TIME GEOGRAPHIC DEPTH MAGNITUDE SD NO. REGION, CONTRIBUTED MAGNITUDES AND COMMENTS UTC COORDINATES GS STA DAY HR MN SEC LAT LONG MB Msz USED 01 19 55 55.3* 32.732 N 109.216 W 0 G 1.6 7 EASTERN ARIZONA. ML 2.6 (GS). 30 miles ESE of Safford. 02 18 25 01.9* 32.716 N 109.126 W 0 G 0.4 8 EASTERN ARIZONA. ML 2.6 (GS). 35 miles ESE of Safford. 02 21 04 33.3* 35.655 N 108.979 W 0 G 0.7 5 NEW MEXICO. ML 1.9 (GS). 15 miles WNW of Gallup. 02 22 20 42.3? 33.01 N 109.11 W 0 G 0.4 6 EASTERN ARIZONA. ML 2.8 (GS). 35 miles ENE of Safford. 03 19 06 21.9* 32.725 N 109.126 W 0 G 0.7 7 EASTERN ARIZONA. ML 3.0 (GS). 35 miles ESE of Safford. 03 20 03 31.7* 43.669 N 105.247 W 0 G 1.1 11 WYOMING. ML 3.3 (GS). 45 miles SSE of Gillette. 03 20 19 36.3* 44.156 N 105.252 W 0 G 1.5 15 WYOMING. ML 3.2 (GS). 15 miles SE of Gillette. 03 21 03 48.9* 32.755 N 109.155 W 0 G 1.5 7 EASTERN ARIZONA. ML 2.6 (GS). 30 miles E of Safford. 03 21 17 10.2 35.363 N 107.554 W 0 G 0.7 8 NEW MEXICO. ML 1.9 (GS). 20 miles NE of Grants. 04 20 29 04.7 41.696 N 108.728 W 0 G 1.1 13 WYOMING. ML 2.4 (GS). 25 miles ENE of Rock Springs. 06 17 40 42.7* 32.460 N 108.962 W 0 G 1.3 11 NEW MEXICO. ML 3.0 (GS). 15 miles WNW of Lordsburg. 06 18 30 42.7* 32.574 N 109.050 W 0 G 0.8 6 EASTERN ARIZONA. ML 2.4 (GS). 25 miles NW of Lordsburg, New Mexico. 06 21 08 05.3 36.462 N 110.384 W 0 G 0.8 14 EASTERN ARIZONA. ML 3.1 (GS). 20 miles SSW of Kayenta. 07 16 50 39.5 41.778 N 109.179 W 0 G 0.7 10 WYOMING. ML 2.0 (GS). 15 miles N of Rock Springs. 07 23 09 22.4? 39.97 N 108.18 W 0 G 2.5 7 COLORADO. ML 2.6 (GS). 35 miles E of Rangely. 08 20 09 03.7 32.867 N 109.269 W 0 G 0.4 8 EASTERN ARIZONA. ML 2.5 (GS). 25 miles E of Safford. 09 17 06 33.6 40.518 N 112.167 W 0 G 0.5 12 UTAH. ML 2.0 (GS). 10 miles E of Tooele. 09 19 54 48.1 41.850 N 108.737 W 0 G 1.0 16 WYOMING. ML 2.7 (GS). 30 miles NE of Rock Springs. 09 20 04 28.5* 43.744 N 105.318 W 0 G 1.0 13 WYOMING. ML 3.3 (GS). 40 miles SSE of Gillette. 09 21 04 03.9* 32.617 N 109.050 W 0 G 0.6 6 EASTERN ARIZONA. ML 2.8 (GS). 25 miles NW of Lordsburg, New Mexico. 09 22 21 04.1 41.733 N 108.840 W 0 G 0.9 11 WYOMING. ML 2.6 (GS). 20 miles ENE of Rock Springs. 09 22 42 18.2 40.702 N 109.427 W 0 G 1.2 11 UTAH. ML 2.4 (GS). 20 miles NNE of Vernal. 10 12 47 11.4 38.891 N 107.557 W 0 G 0.8 10 COLORADO. ML 2.5 (GS). 35 miles NNE of Montrose. 10 19 04 00.3 40.286 N 107.813 W 0 G 0.7 17 COLORADO. ML 3.2 (GS). 20 miles SW of Craig. 10 21 07 35.1 43.741 N 105.309 W 0 G 1.0 13 WYOMING. ML 3.1 (GS). 40 miles SSE of Gillette. 10 21 58 01.2* 33.227 N 109.324 W 0 G 0.5 5 EASTERN ARIZONA. ML 3.1 (GS). 35 miles NE of Safford. 10 22 15 20.6* 46.768 N 122.789 W 0 G 0.7 5 WASHINGTON. MD 2.5 (GS). 10 miles ENE of Centralia. 10 22 44 51.6* 36.588 N 108.443 W 0 G 1.2 6 NEW MEXICO. ML 2.0 (GS). 15 miles SW of Farmingtion. 11 22 18 56.9* 42.003 N 108.784 W 0 G 1.2 9 WYOMING. ML 2.4 (GS). 35 miles NE of Rock Springs. 12 22 11 32.6 35.696 N 108.956 W 0 G 1.4 10 NEW MEXICO. ML 2.2 (GS). 15 miles NW of Gallup. 14 20 50 56.5? 32.81 N 108.96 W 0 G 1.1 8 NEW MEXICO. ML 3.3 (GS). 35 miles NNW of Lordsburg. 14 23 06 49.1 40.298 N 107.769 W 0 G 0.5 10 COLORADO. ML 2.4 (GS). 20 miles SW of Craig. 15 16 10 07.4 41.732 N 108.807 W 0 G 0.9 10 WYOMING. ML 2.1 (GS). 25 miles ENE of Rock Springs. 15 19 51 35.5* 32.562 N 109.196 W 0 G 0.6 8 EASTERN ARIZONA. ML 2.7 (GS). 30 miles WNW of Lordsburg, New Mexico. 15 20 08 29.5 40.559 N 107.421 W 0 G 0.8 12 COLORADO. ML 2.3 (GS). 10 miles ENE of Craig. 15 21 04 54.3* 33.295 N 109.104 W 0 G 0.4 6 EASTERN ARIZONA. ML 2.8 (GS). 35 miles SW of Reserve, New Mexico. 15 22 00 35.3* 33.109 N 109.477 W 0 G 0.9 7 EASTERN ARIZONA. ML 2.4 (GS). 25 miles NE of Safford. 16 19 01 46.6 43.616 N 105.148 W 0 G 0.8 6 WYOMING. ML 3.0 (GS). 50 miles WSW of Newcastle. 16 19 50 42.7? 32.55 N 109.34 W 0 G 1.6 6 EASTERN ARIZONA. ML 2.6 (GS). 30 miles SE of Safford. 16 21 21 23.2* 33.221 N 108.891 W 0 G 0.9 10 NEW MEXICO. ML 2.7 (GS). 35 miles SSW of Reserve. 16 22 03 35.7* 43.547 N 104.909 W 0 G 1.0 6 WYOMING. ML 2.7 (GS). 40 miles WSW of Newcastle. 16 23 04 34.9* 41.937 N 108.688 W 0 G 0.4 5 WYOMING. ML 2.8 (GS). 35 miles NE of Rock Springs. 17 03 14 20.8 40.293 N 106.866 W 0 G 0.8 10 COLORADO. ML 2.1 (GS). 15 miles S of Steamboat Springs. 17 18 05 02.7 36.521 N 110.591 W 0 G 1.1 9 EASTERN ARIZONA. ML 2.0 (GS). 25 miles SW of Kayenta. 17 21 01 01.9* 33.157 N 109.423 W 0 G 0.6 6 EASTERN ARIZONA. ML 2.8 (GS). 30 miles NE of Safford. 17 22 27 33.6 36.363 N 110.273 W 0 G 0.7 10 EASTERN ARIZONA. ML 2.5 (GS). 25 miles S of Kayenta. 18 08 14 43.4* 32.654 N 108.153 W 0 G 1.0 8 NEW MEXICO. ML 2.2 (GS). 10 miles SE of Silver City. 19 18 10 58.5 43.962 N 105.371 W 0 G 0.9 8 WYOMING. ML 2.7 (GS). 25 miles SSE of Gillette. 20 19 03 26.5? 32.63 N 109.17 W 0 G 0.6 7 EASTERN ARIZONA. ML 2.9 (GS). 35 miles NW of Lordsburg, New Mexico. 20 22 00 35.9* 33.240 N 109.068 W 0 G 0.8 10 EASTERN ARIZONA. ML 3.0 (GS). 35 miles SSW of Reserve, New Mexico. 21 19 57 42.3* 32.520 N 109.049 W 0 G 1.1 8 EASTERN ARIZONA. ML 2.8 (GS). 25 miles WNW of Lordsburg, New Mexico. 21 20 34 41.9 40.525 N 112.163 W 0 G 0.6 11 UTAH. ML 2.2 (GS). 5 miles E of Tooele. 21 21 18 04.7* 43.945 N 105.205 W 0 G 1.3 5 WYOMING. ML 2.9 (GS). 25 miles SSE of Gillette. 21 22 00 57.9 40.658 N 109.525 W 0 G 0.8 9 UTAH. ML 1.9 (GS). 15 miles N of Vernal. 22 11 53 03.5 38.856 N 107.524 W 0 G 0.9 9 COLORADO. ML 2.3 (GS). 30 miles NE of Montrose. 22 18 10 20.3 44.128 N 105.417 W 0 G 0.7 13 WYOMING. ML 3.1 (GS). 15 miles SSE of Gillette. 22 22 26 06.1 32.873 N 109.219 W 0 G 1.0 13 EASTERN ARIZONA. ML 3.0 (GS). 30 miles E of Safford. 23 17 58 25.3 35.601 N 108.942 W 0 G 0.5 8 NEW MEXICO. ML 1.9 (GS). 15 miles WNW of Gallup. 23 18 35 01.3 36.443 N 110.378 W 0 G 0.8 13 EASTERN ARIZONA. ML 2.5 (GS). 20 miles SSW of Kayenta. 23 19 20 34.1* 32.513 N 108.935 W 0 G 0.6 10 NEW MEXICO. ML 2.5 (GS). 15 miles NW of Lordsburg. 23 20 25 11.5 40.545 N 107.441 W 0 G 0.8 17 COLORADO. ML 2.9 (GS). near Craig. 23 21 15 48.6 32.659 N 109.066 W 0 G 0.7 12 EASTERN ARIZONA. ML 3.2 (GS). 30 miles NW of Lordsburg, New Mexico. 23 23 48 16.0* 40.586 N 108.017 W 0 G 1.0 7 COLORADO. ML 1.9 (GS). 25 miles WNW of Craig. 24 17 46 41.1 43.791 N 105.209 W 0 G 0.9 7 WYOMING. ML 2.2 (GS). 40 miles SSE of Gillette. 26 16 40 11.1 38.771 N 107.343 W 0 G 0.9 10 COLORADO. ML 2.5 (GS). 25 miles NW of Gunnison. 26 18 02 42.5 40.535 N 112.183 W 0 G 0.7 19 UTAH. ML 2.1 (GS). near Tooele. 27 20 58 33.3 32.601 N 109.047 W 0 G 0.6 11 EASTERN ARIZONA. ML 3.1 (GS). 25 miles NW of Lordsburg, New Mexico. 27 21 12 47.4 43.564 N 105.262 W 0 G 0.8 11 WYOMING. ML 2.9 (GS). 50 miles SSE of Gillette. 28 16 26 04.3 41.754 N 108.749 W 0 G 1.3 14 WYOMING. ML 2.2 (GS). 25 miles ENE of Rock Springs. 28 21 39 31.7 44.081 N 105.397 W 0 G 0.9 10 WYOMING. ML 2.7 (GS). 15 miles SSE of Gillette. 28 23 03 57.1* 32.887 N 109.195 W 0 G 1.3 11 EASTERN ARIZONA. ML 2.9 (GS). 30 miles E of Safford. 29 20 01 46.8 43.707 N 105.226 W 0 G 0.8 16 WYOMING. ML 3.4 (GS). 45 miles SSE of Gillette. 29 20 57 15.4* 32.277 N 108.562 W 0 G 1.3 7 NEW MEXICO. ML 3.0 (GS). 10 miles ESE of Lordsburg. 30 03 59 39.3 39.786 N 107.273 W 0 G 0.8 10 COLORADO. ML 2.9 (GS). 15 miles N of Glenwood Springs. 30 17 18 00.7* 44.063 N 105.404 W 0 G 0.8 5 WYOMING. ML 2.6 (GS). 15 miles SSE of Gillette. 30 18 14 32.7 35.502 N 107.443 W 0 G 0.8 11 NEW MEXICO. ML 2.1 (GS). 30 miles NE of Grants. 30 20 07 23.9 43.699 N 105.210 W 0 G 1.0 18 WYOMING. ML 3.2 (GS). 30 miles SSE of Gillette. 30 21 03 20.2 36.592 N 108.566 W 0 G 0.6 9 NEW MEXICO. ML 2.2 (GS). 20 miles WSW of Farmington. 30 22 06 53.7* 33.106 N 109.304 W 0 G 2.2 9 EASTERN ARIZONA. ML 2.7 (GS). 30 miles NE of Safford. 31 19 08 59.1 33.074 N 109.368 W 0 G 1.0 9 EASTERN ARIZONA. ML 2.6 (GS). 25 miles NE of Safford. 31 22 48 32.6* 38.775 N 107.382 W 0 G 1.2 8 COLORADO. ML 2.4 (GS). 30 miles WNW of Gunnison.