U.S. DEPARTMENT OF THE INTERIOR NO. 7-99-EXP GEOLOGICAL SURVEY DEC 8, 1999 PROBABLE MINING EXPLOSIONS IN THE UNITED STATES JULY 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 10 00 20 37.0* 33.302 N 107.952 W 0 G 1.4 7 NEW MEXICO. ML 2.0 (GS). 40 miles NNE of Silver City. U.S. DEPARTMENT OF THE INTERIOR NO. 8-99-EXP GEOLOGICAL SURVEY DEC 8, 1999 PROBABLE MINING EXPLOSIONS IN THE UNITED STATES AUGUST 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 12 18 06 59.7* 43.854 N 105.212 W 0 G 1.0 13 WYOMING. ML 3.6 (GS). 35 miles SSE of Gillette. 15 16 29 56.8 41.700 N 108.692 W 0 G 1.0 14 WYOMING. ML 3.5 (GS). 25 miles ENE of Rock Springs. U.S. DEPARTMENT OF THE INTERIOR NO. 9-99-EXP GEOLOGICAL SURVEY DEC 8, 1999 PROBABLE MINING EXPLOSIONS IN THE UNITED STATES SEPTEMBER 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 03 20 18 21.5? 43.77 N 104.18 W 0 G 1.1 13 WYOMING. mbLg 3.2 (GS). near Newcastle. 06 20 34 59.0* 43.910 N 105.404 W 0 G 1.2 11 WYOMING. ML 3.5 (GS). 25 miles S of Gillette. 17 22 32 33.8 45.172 N 106.743 W 0 G 0.6 11 MONTANA. 30 miles NNE of Sheridan, Wyoming.