Bulletin: March 1998
U.S. DEPARTMENT OF THE INTERIOR NO. 3-98-EXP GEOLOGICAL SURVEY JUL 27, 1998 PROBABLE MINING EXPLOSIONS IN THE UNITED STATES MARCH 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 25 15 58 46.3 40.635 N 112.276 W 0 G 1.2 13 UTAH. ML 1.9 (GS). 5 miles (10 km) N of Tooele, Utah. 27 17 59 51.8* 47.347 N 93.185 W 0 G 1.7 5 MINNESOTA. mbLg 2.7 (GS). 15 miles (20 km) WSW of Hibbing, Minnesota.
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.