U.S. DEPARTMENT OF THE INTERIOR NO. 12-98-EXP GEOLOGICAL SURVEY APR 5, 1999 PROBABLE MINING EXPLOSIONS IN THE UNITED STATES DECEMBER 1998 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 20 48 53.2* 38.068 N 81.412 W 0 G 1.3 7 WEST VIRGINIA. mbLg 3.1 (GS). 25 miles (40 km) SSE of Charleston, West Virginia. 02 21 17 19.2* 36.405 N 110.435 W 0 G 1.4 6 EASTERN ARIZONA. ML 2.6 (GS). 20 miles (40 km) SSW of Kayenta, Arizona. 02 23 06 55.0 40.304 N 107.824 W 0 G 1.2 15 COLORADO. ML 2.8 (GS). 20 miles (30 km) SW of Craig, Colorado. 05 16 27 12.4 41.795 N 108.772 W 0 G 1.0 15 WYOMING. ML 2.6 (GS). 25 miles (40 km) ENE of Rock Springs, Wyoming. 05 23 05 04.0 40.428 N 107.826 W 0 G 1.3 11 COLORADO. ML 2.5 (GS). 15 miles (30 km) WSW of Craig, Colorado. 07 23 01 28.5 40.338 N 107.784 W 0 G 1.4 13 COLORADO. ML 2.9 (GS). 15 miles (30 km) SW of Craig, Colorado. 08 19 07 20.1* 36.620 N 108.432 W 0 G 0.9 7 NEW MEXICO. ML 2.9 (GS). 15 miles (20 km) WSW of Farmington, New Mexico. 09 20 51 57.9 40.595 N 112.181 W 0 G 1.3 13 UTAH. ML 2.7 (GS). 10 miles (10 km) NE of Tooele, Utah. 09 23 50 00.1 40.246 N 107.779 W 0 G 1.1 12 COLORADO. ML 2.7 (GS). 20 miles (40 km) SSW of Craig, Colorado. 10 19 05 57.4 36.463 N 110.339 W 0 G 1.3 10 EASTERN ARIZONA. ML 2.4 (GS). 20 miles (30 km) SSW of Kayenta, Arizona. 10 21 43 25.7* 40.409 N 107.556 W 0 G 0.7 6 COLORADO. ML 2.5 (GS). 5 miles (10 km) S of Craig, Colorado. 10 22 48 55.2 40.564 N 109.686 W 0 G 1.3 10 UTAH. ML 2.4 (GS). 10 miles (20 km) NW of Vernal, Utah. 11 17 24 47.5 40.560 N 112.162 W 0 G 1.1 23 UTAH. ML 2.6 (GS). 5 miles (10 km) ENE of Tooele, Utah. 11 23 08 06.2 40.331 N 107.809 W 0 G 1.3 17 COLORADO. ML 2.9 (GS). 20 miles (30 km) SW of Craig, Colorado. 14 23 01 59.9* 43.419 N 104.989 W 0 G 1.0 7 WYOMING. ML 2.7 (GS). 50 miles (80 km) SW of Newcastle, Wyoming. 15 21 00 58.3* 32.827 N 109.495 W 0 G 1.4 8 EASTERN ARIZONA. ML 3.1 (GS). 10 miles (20 km) E of Safford, Arizona. 15 21 35 40.0 43.722 N 105.266 W 0 G 0.8 9 WYOMING. ML 3.4 (GS). 40 miles (70 km) SSE of Gillette, Wyoming. 15 22 54 19.9 40.617 N 109.450 W 0 G 1.4 10 UTAH. ML 2.5 (GS). 10 miles (20 km) NNE of Vernal, Utah. 15 22 57 30.2* 40.311 N 107.711 W 0 G 1.5 8 COLORADO. ML 2.5 (GS). 15 miles (30 km) SSW of Craig, Colorado. 17 19 01 20.5* 32.619 N 109.334 W 0 G 1.3 8 EASTERN ARIZONA. ML 2.7 (GS). 25 miles (40 km) SE of Safford, Arizona. 18 22 43 17.3 40.563 N 109.549 W 0 G 0.9 14 UTAH. ML 2.6 (GS). 5 miles (10 km) N of Vernal, Utah. 19 19 17 09.3 43.457 N 104.918 W 0 G 1.0 10 WYOMING. ML 3.0 (GS). 45 miles (70 km) SW of Newcastle, Wyoming. 19 20 05 11.2 37.898 N 81.417 W 0 G 1.1 9 WEST VIRGINIA. mbLg 2.9 (GS). 15 miles (20 km) WNW of Beckley, West Virginia. 21 16 20 55.2 40.527 N 112.181 W 0 G 1.2 20 UTAH. ML 2.4 (GS). 5 miles (10 km) E of Tooele, Utah. 21 20 03 17.4 41.832 N 108.896 W 0 G 1.1 17 WYOMING. ML 2.5 (GS). 25 miles (40 km) NE of Rock Springs, Wyoming. 21 20 37 35.3* 32.803 N 109.679 W 0 G 1.3 10 EASTERN ARIZONA. ML 2.9 (GS). NEAR Safford, Arizona. 22 21 05 47.4 41.921 N 108.503 W 0 G 1.1 16 WYOMING. ML 2.6 (GS). 45 miles (70 km) ENE of Rock Springs, Wyoming. 23 22 19 55.2* 35.703 N 108.947 W 0 G 0.8 7 NEW MEXICO. ML 2.3 (GS). 15 miles (30 km) NW of Gallup, New Mexico. 23 23 20 51.1 40.246 N 107.868 W 0 G 1.1 14 COLORADO. ML 2.4 (GS). 25 miles (40 km) SW of Craig, Colorado. 26 23 08 30.4* 35.453 N 108.975 W 0 G 1.2 9 NEW MEXICO. ML 2.3 (GS). 15 miles (20 km) WSW of Gallup, New Mexico. 27 23 02 55.6 40.268 N 107.882 W 0 G 1.5 13 COLORADO. ML 2.5 (GS). 25 miles (40 km) SW of Craig, Colorado. 30 22 32 11.2 41.653 N 108.778 W 0 G 0.9 17 WYOMING. ML 2.9 (GS). 20 miles (40 km) ENE of Rock Springs, Wyoming. 30 22 34 03.0 41.946 N 108.907 W 0 G 1.1 14 WYOMING. ML 2.7 (GS). 30 miles (50 km) NNE of Rock Springs, Wyoming. 30 23 01 27.8 40.332 N 107.770 W 0 G 1.3 16 COLORADO. ML 3.0 (GS). 15 miles (30 km) SW of Craig, Colorado. 31 18 18 16.0 36.404 N 110.443 W 0 G 1.3 9 EASTERN ARIZONA. ML 2.4 (GS). 25 miles (40 km) SSW of Kayenta, Arizona.