U.S. DEPARTMENT OF THE INTERIOR NO. 2-99-EXP GEOLOGICAL SURVEY NOV 8, 1999 PROBABLE MINING EXPLOSIONS IN THE UNITED STATES FEBRUARY 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 16 15.8 41.742 N 108.665 W 0 G 1.0 16 WYOMING. ML 2.4 (GS). 30 miles (50 km) ENE of Rock Springs, Wyoming. 01 20 27 54.4 40.571 N 112.188 W 0 G 0.9 21 UTAH. ML 2.6 (GS). Near Tooele, Utah. 02 22 45 26.1 40.625 N 109.589 W 0 G 0.7 13 UTAH. ML 2.5 (GS). 10 miles (20 km) NNW of Vernal, Utah. 08 23 09 01.2 40.407 N 107.818 W 0 G 1.0 11 COLORADO. ML 3.2 (GS). 15 miles (30 km) WSW of Craig, Colorado. 10 20 14 32.5* 33.022 N 109.475 W 0 G 0.9 6 EASTERN ARIZONA. ML 2.6 (GS). 20 miles (30 km) NE of Safford, Arizona. 12 22 52 55.5 41.589 N 108.854 W 0 G 1.1 17 WYOMING. ML 2.5 (GS). 20 miles (30 km) E of Rock Springs, Wyoming. 12 23 28 56.7* 32.701 N 109.371 W 0 G 1.4 9 EASTERN ARIZONA. ML 2.7 (GS). 20 miles (30 km) ESE of Safford, Arizona. 13 18 33 52.9 41.800 N 108.661 W 0 G 0.8 23 WYOMING. ML 3.1 (GS). 30 miles (50 km) ENE of Rock Springs, Wyoming. 14 21 17 38.2 41.824 N 108.759 W 0 G 0.7 14 WYOMING. ML 2.6 (GS). 30 miles (50 km) NE of Rock Springs, Wyoming. 15 22 03 23.4 37.997 N 81.202 W 0 G 0.9 9 WEST VIRGINIA. mbLg 3.1 (GS). 15 miles (20 km) N of Beckley, West Virginia. 15 22 36 07.0 41.785 N 108.724 W 0 G 1.2 19 WYOMING. ML 2.8 (GS). 30 miles (40 km) ENE of Rock Springs, Wyoming. 17 23 08 16.8 40.307 N 107.792 W 0 G 1.2 10 COLORADO. ML 2.7 (GS). 20 miles (30 km) SW of Craig, Colorado. 18 18 47 34.4* 32.518 N 109.126 W 0 G 1.5 10 EASTERN ARIZONA. ML 2.8 (GS). 25 miles (40 km) WNW of Lordsburg, New Mexico. 18 21 46 44.1* 32.928 N 109.550 W 0 G 0.8 9 EASTERN ARIZONA. ML 2.6 (GS). 10 miles (20 km) NE of Safford, Arizona. 19 23 03 05.3* 40.363 N 107.718 W 0 G 1.4 8 COLORADO. ML 2.5 (GS). 15 miles (20 km) SW of Craig, Colorado. 20 20 37 27.9 40.551 N 112.188 W 0 G 1.1 21 UTAH. ML 2.5 (GS). NEAR Tooele, Utah. 21 16 29 31.1 40.524 N 112.143 W 0 G 0.6 18 UTAH. ML 2.2 (GS). 10 miles (10 km) E of Tooele, Utah. 22 20 09 55.7 43.649 N 105.141 W 0 G 1.1 14 WYOMING. ML 3.4 (GS). 50 miles (80 km) SSE of Gillette, Wyoming. 23 17 04 30.1 40.616 N 109.557 W 0 G 1.4 12 UTAH. ML 2.4 (GS). 10 miles (20 km) N of Vernal, Utah. 23 17 27 06.4 40.554 N 112.206 W 0 G 0.9 20 UTAH. ML 2.5 (GS). NEAR Tooele, Utah. 23 20 00 59.0* 44.053 N 105.101 W 0 G 1.4 8 WYOMING. ML 3.2 (GS). 25 miles (40 km) SE of Gillette, Wyoming. 24 17 14 35.5 37.225 N 82.008 W 0 G 1.4 8 WEST VIRGINIA. mbLg 3.3 (GS). 35 miles (50 km) ESE of Pikeville, Kentucky. 24 21 20 37.6 40.153 N 107.015 W 0 G 1.5 9 COLORADO. ML 2.4 (GS). 25 miles (40 km) SSW of Steamboat Springs, Colorado. 25 17 08 30.4* 37.027 N 82.630 W 0 G 0.8 5 WEST VIRGINIA. mbLg 3.0 (GS). 10 miles (20 km) NNE of Big Stone Gap, Virginia. 25 20 07 10.1 43.666 N 105.241 W 0 G 1.4 16 WYOMING. ML 3.4 (GS). 45 miles (70 km) SSE of Gillette, Wyoming. 25 21 29 29.1 40.578 N 109.559 W 0 G 1.0 9 UTAH. ML 2.5 (GS). 10 miles (10 km) N of Vernal, Utah. 26 20 08 13.8* 43.436 N 105.664 W 0 G 0.7 12 WYOMING. ML 3.4 (GS). 30 miles (50 km) E of Midwest, Wyoming. 26 21 36 59.8* 36.517 N 110.490 W 0 G 1.5 7 EASTERN ARIZONA. ML 2.5 (GS). 20 miles (30 km) SW of Kayenta, Arizona. 28 23 06 10.5 40.269 N 107.838 W 0 G 1.2 16 COLORADO. ML 2.4 (GS). 25 miles (40 km) SW of Craig, Colorado.