USGS WPhase Moment Solution
VANUATU
11/ 8/20 16:55:2.00 Epicenter: -18.260 168.069 MW 7.2 USGS/WPHASE CENTROID MOMENT TENSOR 11/ 8/20 16:55: 2.00 Centroid: -18.360 167.858 Depth 35 No. of sta: 42 Moment Tensor; Scale 10**19 Nm Mrr= 5.18 Mtt=-0.17 Mpp=-5.01 Mrt= 2.92 Mrp=-3.33 Mtp= 1.73 Principal axes: T Val= 6.97 Plg=67 Azm= 32 N = 0.00 12 153 P = -6.97 19 247 Best Double Couple:Mo=7.0*10**19 NP1:Strike=357 Dip=28 Slip= 116 NP2: 147 65 77
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.
