USGS WPhase Moment Solution
10/ 7/18 5:56:45.00 Epicenter: 52.880 -169.850 MW 6.6 USGS/WPHASE CENTROID MOMENT TENSOR 10/ 7/18 5:56:45.00 Centroid: 52.780 -169.352 Depth 13 No. of sta: 43 Moment Tensor; Scale 10**18 Nm Mrr=-4.68 Mtt= 0.22 Mpp= 4.46 Mrt= 0.08 Mrp= 3.40 Mtp=-9.51 Principal axes: T Val= 12.48 Plg= 8 Azm=232 N = -3.78 57 336 P = -8.70 30 137 Best Double Couple:Mo=1.1*10**19 NP1:Strike=279 Dip=62 Slip=-163 NP2: 181 75 -28
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.
