Bulletin: July-September, 1999
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.
For origin times after September 30, 2002, USGS computations of hypocenters and magnitudes for routine mining events are listed in this publication only for exceptionally large events and for events that are also listed in the Reviewed Event Event Bulletins (REB) of the International Data Center of the United Nations' Comprehensive Nuclear-Test-Ban Treaty Organization.
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