U.S. DEPARTMENT OF THE INTERIOR NO. 5-99-EXP GEOLOGICAL SURVEY DEC 8, 1999 PROBABLE MINING EXPLOSIONS IN THE UNITED STATES MAY 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 16 59 57.0 40.535 N 112.186 W 0 G 0.9 19 UTAH. ML 2.6 (GS). 5 miles (10 km) E of Tooele, Utah. 07 01 32 59.9* 43.993 N 105.373 W 0 G 1.1 7 WYOMING. ML 2.6 (GS). 20 miles (30 km) SSE of Gillette, Wyoming. 07 19 15 08.8 43.558 N 105.087 W 0 G 1.0 12 WYOMING. ML 3.4 (GS). 50 miles (80 km) WSW of Newcastle, Wyoming. 07 20 21 17.5* 43.581 N 105.234 W 0 G 1.0 6 WYOMING. ML 2.9 (GS). 50 miles (80 km) SSE of Gillette, Wyoming. 08 22 07 22.0 40.336 N 107.823 W 0 G 0.8 15 COLORADO. ML 2.5 (GS). 20 miles (30 km) SW of Craig, Colorado. 09 15 37 26.0 40.507 N 112.162 W 0 G 1.1 11 UTAH. ML 2.5 (GS). 10 miles (10 km) E of Tooele, Utah. 11 19 23 54.5 40.521 N 112.204 W 0 G 0.7 14 UTAH. ML 2.5 (GS). Near Tooele, Utah. 12 21 04 07.6 40.514 N 112.168 W 0 G 0.5 14 UTAH. ML 2.4 (GS). 5 miles (10 km) E of Tooele, Utah. 14 22 33 44.6? 31.57 N 108.35 W 0 G 1.1 6 NEW MEXICO-CHIHUAHUA BORDER REG. 45 miles WSW of Columbus, New Mexico. 15 00 25 32.7* 43.433 N 104.715 W 0 G 0.9 7 WYOMING. ML 2.8 (GS). 40 miles SW of Newcastle. 16 15 12 44.4 41.807 N 108.620 W 0 G 0.8 12 WYOMING. ML 2.5 (GS). 35 miles (50 km) ENE of Rock Springs, Wyoming. 16 18 06 39.9 40.305 N 107.736 W 0 G 1.2 10 COLORADO. ML 2.5 (GS). 20 miles (30 km) SW of Craig, Colorado. 19 17 17 42.7 41.828 N 108.732 W 0 G 1.4 11 WYOMING. ML 2.7 (GS). 30 miles (50 km) NE of Rock Springs, Wyoming. 20 19 37 23.2 40.497 N 112.219 W 0 G 0.6 9 UTAH. ML 2.4 (GS). Near Tooele, Utah. 20 21 42 42.6* 40.631 N 109.519 W 0 G 0.4 6 UTAH. ML 2.7 (GS). 10 miles (20 km) N of Vernal, Utah. 22 19 44 56.7 40.529 N 112.147 W 0 G 0.9 15 UTAH. ML 2.4 (GS). 10 miles (10 km) E of Tooele, Utah. 23 17 33 45.9 41.812 N 108.721 W 0 G 1.4 11 WYOMING. ML 2.4 (GS). 30 miles (50 km) ENE of Rock Springs, Wyoming. 24 22 54 38.2 41.644 N 108.931 W 0 G 1.5 11 WYOMING. ML 2.4 (GS). 15 miles (20 km) ENE of Rock Springs, Wyoming. 26 17 35 48.9 36.469 N 110.327 W 0 G 1.3 12 EASTERN ARIZONA. ML 2.6 (GS). 20 miles (30 km) SSW of Kayenta, Arizona. 26 18 16 41.1 40.336 N 107.466 W 0 G 0.6 9 COLORADO. ML 2.4 (GS). 15 miles (20 km) SSE of Craig, Colorado. 26 18 35 30.8 41.765 N 108.636 W 0 G 1.0 12 WYOMING. ML 2.5 (GS). 30 miles (50 km) ENE of Rock Springs, Wyoming. 26 19 42 33.4 41.735 N 110.693 W 0 G 0.7 13 WYOMING. ML 2.1 (GS). 35 miles (60 km) NNE of Evanston, Wyoming. 26 21 18 43.7 40.619 N 109.609 W 0 G 1.0 13 UTAH. ML 2.5 (GS). 10 miles (20 km) NW of Vernal, Utah. 27 15 52 10.2* 36.679 N 108.616 W 0 G 1.1 7 NEW MEXICO. ML 2.7 (GS). 20 miles (40 km) W of Farmington, New Mexico. 27 18 49 57.9 41.590 N 108.829 W 0 G 0.9 11 WYOMING. ML 2.9 (GS). 20 miles (30 km) E of Rock Springs, Wyoming. 27 21 00 11.4 40.426 N 107.544 W 0 G 1.2 14 COLORADO. ML 2.9 (GS). Near Craig, Colorado. 28 17 19 33.4* 36.687 N 108.436 W 0 G 0.8 6 NEW MEXICO. ML 2.6 (GS). 10 miles (20 km) WSW of Farmington, New Mexico. 28 22 19 56.9? 43.41 N 105.30 W 0 G 1.1 9 WYOMING. ML 3.0 (GS). 45 miles (70 km) N of Douglas, Wyoming. 30 22 06 47.8 40.278 N 107.742 W 0 G 1.2 16 COLORADO. ML 3.1 (GS). 20 miles (30 km) SW of Craig, Colorado.