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Earthquake Hazards Program

Harvard Moment Tensor Solution

Magnitude 5.6 WESTERN MONTANA
Tuesday, July 26, 2005 at 04:08:37 UTC

Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver


July 26, 2005, WESTERN MONTANA, MW=5.6

Natasha Maternovskaya

CENTROID, MOMENT TENSOR SOLUTION
HARVARD EVENT-FILE NAME C072605A
DATA USED: GSN
L.P. BODY WAVES: 50S, 98C, T= 40
SURFACE WAVES:   69S,155C, T= 50
CENTROID LOCATION:
ORIGIN TIME       04:08:39.4 0.1
LAT 45.34N 0.01;LON 112.50W 0.01
DEP  13.3 0.5;HALF-DURATION  1.5
MOMENT TENSOR; SCALE 10**24 D-CM
  MRR=-1.95 0.04; MTT=-0.04 0.03
  MPP= 1.99 0.04; MRT=-1.13 0.09
  MRP= 0.13 0.08; MTP=-1.46 0.03
 PRINCIPAL AXES:
 1.(T) VAL=  2.84;PLG= 8;AZM=240
 2.(N)      -0.31;    28;    146
 3.(P)      -2.54;    61;    345
BEST DOUBLE COUPLE:M0=2.7*10**24
 NP1:STRIKE=359;DIP=44;SLIP= -48
 NP2:STRIKE=127;DIP=59;SLIP=-123

            -------####           
        -------------######       
      -----------------######     
    --------------------#######   
   ##---------   --------#######  
  ###--------- P ---------####### 
  ####--------   ---------####### 
 ######-------------------########
 #######-------------------#######
 ########------------------#######
 ##########---------------########
  ###########-------------####### 
  #   ##########----------####### 
    T #############------#######  
      ##################-#####-   
      #################------     
        ##############-----       
            #######----    

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