USGS WPhase Moment Solution
VANUATU
11/ 8/20 18:19:24.00 Epicenter: -18.287 168.132 MW 7.1 USGS/WPHASE CENTROID MOMENT TENSOR 11/ 8/20 18:19:24.00 Centroid: -18.087 167.816 Depth 35 No. of sta: 30 Moment Tensor; Scale 10**19 Nm Mrr= 4.17 Mtt=-0.33 Mpp=-3.84 Mrt= 1.88 Mrp=-2.93 Mtp= 1.36 Principal axes: T Val= 5.46 Plg=69 Azm= 46 N = 0.04 6 155 P = -5.50 19 248 Best Double Couple:Mo=5.5*10**19 NP1:Strike=350 Dip=26 Slip= 106 NP2: 152 65 82
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.
