Harvard Moment Tensor Solution
Magnitude 4.6 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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