USGS WPhase Moment Solution
11/10/21 17:57:17.00 Epicenter: -28.941 -176.045 MW 7.4 USGS/WPHASE CENTROID MOMENT TENSOR 11/10/21 17:57:17.00 Centroid: -28.641 -175.705 Depth 50 No. of sta: 39 Moment Tensor; Scale 10**20 Nm Mrr= 1.28 Mtt=-0.00 Mpp=-1.27 Mrt= 0.08 Mrp=-0.19 Mtp=-0.76 Principal axes: T Val= 1.31 Plg=80 Azm= 41 N = 0.32 9 204 P = -1.64 2 294 Best Double Couple:Mo=1.5*10**20 NP1:Strike= 34 Dip=43 Slip= 104 NP2: 196 48 78
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.
