U.S. DEPARTMENT OF THE INTERIOR                                                                         NO.  4-98-EXP
GEOLOGICAL SURVEY                                                                                        JUL 27, 1998
 
                                     PROBABLE MINING EXPLOSIONS IN THE UNITED STATES
 
                                                         APRIL 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
 
11  16 02 33.6* 43.330 N  104.971 W    0 G           1.3   10  WYOMING. ML 3.3 (GS). 45 miles (70 km) NNE of Douglas,
                                                                Wyoming.
16  18 54 42.6* 32.824 N  109.531 W    0 G           1.4    7  EASTERN ARIZONA. ML 2.5 (GS). 10 miles (20 km) E of Safford,
                                                                Arizona.
17  19 05 21.1  43.764 N  105.232 W    0 G           1.2   12  WYOMING. ML 3.3 (GS). 40 miles (60 km) SSE of Gillette,
                                                                Wyoming.
24  17 26 40.3? 47.47  N   92.80  W    0 G           2.5    4  MINNESOTA. mbLg 3.4 (GS). 5 miles (10 km) ENE of Hibbing,
                                                                Minnesota.