U.S. DEPARTMENT OF THE INTERIOR NO. 6-99-EXP GEOLOGICAL SURVEY DEC 8, 1999 PROBABLE MINING EXPLOSIONS IN THE UNITED STATES JUNE 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 21 01 45.8 38.015 N 81.421 W 0 G 0.6 8 WEST VIRGINIA. mbLg 3.0 (GS). 20 miles (30 km) NW of Beclkey, West Virginia. 01 21 10 54.0* 44.177 N 105.191 W 0 G 0.4 5 WYOMING. ML 2.8 (GS). 15 miles (30 km) ESE of Gillette, Wyoming. 02 16 16 12.1 40.508 N 112.141 W 0 G 0.7 10 UTAH. ML 2.4 (GS). 5 miles (10 km) E of Tooele, Utah. 03 19 05 38.1* 41.794 N 108.812 W 0 G 1.0 10 WYOMING. ML 2.5 (GS). 25 miles (40 km) NE of Rock Springs, Wyoming. 03 22 24 43.8* 44.072 N 105.277 W 0 G 0.9 7 WYOMING. ML 3.0 (GS). 20 miles (30 km) SE of Gillette, Wyoming. 03 22 39 43.1* 44.167 N 105.242 W 0 G 0.8 8 WYOMING. ML 3.1 (GS). 15 miles (20 km) ESE of Gillette, Wyoming. 06 21 57 19.2 40.229 N 107.717 W 0 G 0.5 11 COLORADO. ML 2.7 (GS). 20 miles (30 km) SSW of Craig, Colorado. 07 17 29 16.5* 36.485 N 110.458 W 0 G 1.5 6 EASTERN ARIZONA. ML 2.2 (GS). 20 miles (30 km) SW of Kayenta, Arizona. 09 16 12 23.1 40.511 N 112.134 W 0 G 0.8 13 UTAH. ML 2.3 (GS). 10 miles (10 km) ESE of Tooele, Utah. 09 19 02 31.9* 36.586 N 108.393 W 0 G 1.3 11 NEW MEXICO. ML 2.7 (GS). 15 miles (20 km) SW of Farmington, New Mexico. 09 19 55 23.7* 36.206 N 110.132 W 0 G 1.2 10 EASTERN ARIZONA. ML 2.5 (GS). 35 miles (50 km) W of Chinle, Arizona. 10 18 55 43.0 41.822 N 110.649 W 0 G 0.8 13 WYOMING. ML 2.5 (GS). 40 miles (60 km) NNE of Evanston, Wyoming. 10 22 00 25.8 40.277 N 107.802 W 0 G 0.9 18 COLORADO. ML 3.4 (GS). 20 miles (30 km) SW of Craig, Colorado. 10 22 31 16.2 41.750 N 108.665 W 0 G 1.0 11 WYOMING. ML 2.8 (GS). 30 miles (50 km) ENE of Rock Springs, Wyoming. 11 20 54 53.6 41.751 N 108.546 W 0 G 1.2 16 WYOMING. 35 miles (60 km) ENE of Rock Springs, Wyoming. 12 19 41 13.5 41.738 N 109.026 W 0 G 1.0 13 WYOMING. ML 2.3 (GS). 15 miles (20 km) NE of Rock Springs, Wyoming. 14 19 07 12.8* 43.732 N 105.659 W 0 G 0.6 5 WYOMING. ML 2.7 (GS). 40 miles (60 km) NE of Midwest, Wyoming. 16 17 14 26.6* 36.278 N 110.372 W 0 G 1.1 10 EASTERN ARIZONA. ML 2.3 (GS). 30 miles (50 km) SSW of Kayenta, Arizona. 16 19 16 48.3 41.831 N 110.765 W 0 G 1.1 18 WYOMING. ML 2.2 (GS). 40 miles (60 km) NNE of Evanston, Wyoming. 17 16 27 05.4 43.823 N 105.017 W 0 G 1.1 10 WYOMING. ML 3.1 (GS). 40 miles (60 km) SE of Gillette, Wyoming. 18 18 46 26.4 41.710 N 110.798 W 0 G 0.9 17 WYOMING. ML 2.2 (GS). 30 miles (50 km) NNE of Evanston, Wyoming. 18 19 02 38.6 41.676 N 108.877 W 0 G 1.5 15 WYOMING. ML 2.4 (GS). 15 miles (30 km) ENE of Rock Springs, Wyoming. 18 20 42 41.8 40.602 N 109.564 W 0 G 1.2 12 UTAH. ML 2.5 (GS). 10 miles (20 km) N of Vernal, Utah. 23 18 38 33.8* 32.783 N 109.560 W 0 G 1.1 9 EASTERN ARIZONA. ML 2.7 (GS). 10 miles (10 km) ESE of Safford, Arizona. 23 19 08 26.0* 43.697 N 104.861 W 0 G 1.4 12 WYOMING. ML 3.2 (GS). 35 miles WSW of Newcastle. 23 20 41 47.6* 36.582 N 108.430 W 5 G 0.7 6 NEW MEXICO. ML 2.7 (GS). 15 miles (20 km) SW of Farmington, New Mexico. 23 21 50 07.4 37.900 N 81.565 W 0 G 1.0 8 WEST VIRGINIA. mbLg 2.9 (GS). 20 miles (40 km) WNW of Beckley, West Virginia. 23 22 28 13.4 40.484 N 109.649 W 0 G 0.9 10 UTAH. ML 2.5 (GS). 5 miles (10 km) WNW of Vernal, Utah. 24 22 03 40.2* 32.658 N 109.192 W 0 G 1.5 10 EASTERN ARIZONA. ML 2.7 (GS). 30 miles (50 km) ESE of Safford, Arizona. 25 17 59 05.7* 36.700 N 108.520 W 0 G 0.5 7 NEW MEXICO. ML 2.7 (GS). 15 miles (30 km) W of Farmington, New Mexico. 25 22 05 21.7* 40.248 N 107.754 W 0 G 1.2 10 COLORADO. ML 2.7 (GS). 20 miles (30 km) SSW of Craig, Colorado.