Bulletin: May 2003

U.S. DEPARTMENT OF THE INTERIOR                                                                         NO.  5-03-EXP
GEOLOGICAL SURVEY                                                                                        JUN 16, 2003
 
                                      ROUTINE MINING SEISMICITY IN THE UNITED STATES
 
                                                          MAY 2003
 
 
  ORIGIN TIME       GEOGRAPHIC       DEPTH MAGNITUDE  SD  GAP  NO.   F-E REGION, CONTRIBUTED MAGNITUDES AND COMMENTS
      UTC          COORDINATES                GS               STA                                                
DAY HR MN SEC     LAT       LONG            mb  MS             USED                                                
 
04  17 09 40.2* 44.201 N  105.334 W    0 G           2.3  164    5  WYOMING. ML 3.2 (GS).
04  17 28 06.3  40.417 N  106.925 W    0 G           1.2   92   22  COLORADO. ML 3.1 (GS).
07  20 09 58.0* 43.925 N  105.369 W    0 G           1.8  160   13  WYOMING. ML 2.6 (GS). 40 km (25 miles) SSE of Gillette.
08  19 12 26.8  44.103 N  105.360 W    0 G           1.0  146   15  WYOMING. ML 3.4 (GS).
08  22 36 43.6* 44.162 N  105.413 W    0 G           1.4  159   10  WYOMING. ML 3.0 (GS).
12  19 34 16.4* 45.196 N  106.840 W    0 G           1.4  184   10  EASTERN MONTANA. ML 3.2 (GS). 30 miles (45 km) north-
                                                                     northeast of Sheridan, Wyoming. 30 miles (45 km) north-
                                                                     northeast of Sheridan, Wyoming.
14  20 09 58.4  44.077 N  105.367 W    0 G           0.8  144   18  WYOMING. ML 3.3 (GS). 25 km (15 miles) SSE of Gillette.
15  20 02 10.2  36.612 N  108.453 W    0 G           0.8   71   11  NEW MEXICO. ML 2.7 (GS). 25 km (15 miles) WSW of
                                                                     Farmington, New Mexico.
16  20 03 30.6  43.699 N  105.286 W    0 G           0.8  127   18  WYOMING. ML 3.5 (GS).
21  18 00 17.3  43.707 N  105.302 W    0 G           0.9  119   15  WYOMING. ML 3.3 (GS).
23  18 07 15.9  43.732 N  105.290 W    0 G           0.8  124   14  WYOMING. ML 2.9 (GS).
24  17 52 35.5? 43.48  N  105.78  W    0 G           1.5  253   11  WYOMING
25  18 04 08.1  43.786 N  105.324 W    0 G           0.8  127   20  WYOMING. ML 3.3 (GS).
30  22 05 22.7  40.313 N  107.758 W    0 G           0.6  173   13  COLORADO. ML 2.9 (GS).

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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