Harvard Moment Tensor Solution

Magnitude 4.5 WESTERN MONTANA
Monday, October 31, 2005 at 00:23:30 UTC

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


October 31, 2005, WESTERN MONTANA, MW=4.5

Meredith Nettles
Goran Ekstrom

CENTROID, MOMENT TENSOR SOLUTION
HARVARD EVENT-FILE NAME S103105B
DATA USED: GSN ANSS
SURFACE WAVES:   26S, 36C, T= 40
CENTROID LOCATION:
ORIGIN TIME       00:23:34.9 0.5
LAT 44.83N 0.03;LON 113.30W 0.05
DEP  13.4 3.0;HALF-DURATION  0.4
MOMENT TENSOR; SCALE 10**22 D-CM
  MRR=-4.03 0.79; MTT= 0.34 0.40
  MPP= 3.69 0.53; MRT= 5.25 1.51
  MRP=-3.30 1.10; MTP=-3.05 0.32
 PRINCIPAL AXES:
 1.(T) VAL=  8.17;PLG=26;AZM= 51
 2.(N)      -0.53;    18;    312
 3.(P)      -7.65;    58;    192
BEST DOUBLE COUPLE:M0=7.9*10**22
 NP1:STRIKE=176;DIP=25;SLIP= -44
 NP2:STRIKE=307;DIP=73;SLIP=-108

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