USGS WPhase Moment Solution
OFF COAST OF OREGON
13/01/30 3:14:28 Epicenter: 43.566 -127.598 MW 5.4 USGS/WPHASE CENTROID MOMENT TENSOR 13/01/30 03:14:28.00 Centroid: 43.466 -127.598 Depth 11 No. of sta: 71 Moment Tensor; Scale 10**17 Nm Mrr= 0.05 Mtt=-0.92 Mpp= 0.87 Mrt=-0.02 Mrp= 0.16 Mtp=-1.00 Principal axes: T Val= 1.34 Plg= 6 Azm=246 N = 0.03 82 51 P = -1.37 1 155 Best Double Couple:Mo=1.4*10**17 NP1:Strike=291 Dip=84 Slip= 176 NP2: 21 86 6
The figure above shows a visual representation of the style of faulting (focal mechanism)
derived from the estimated moment tensor.
Shaded areas show quadrants of the focal sphere in which the P-wave first-motions
are away from the source, and unshaded areas show quadrants
in which the P-wave first-motions are toward the source.
The dots represent the axis of maximum compressional strain
(in black, called the "P-axis")
and the axis of maximum extensional strain (in white, called the "T-axis")
resulting from the earthquake.
