USGS Body-Wave Moment Tensor Solution
VANUATU
11/08/20 16:54:58.34 Epicenter: -18.417 168.075 MW 7.0 USGS MOMENT TENSOR SOLUTION Depth 31 No. of sta: 50 Moment Tensor; Scale 10**19 Nm Mrr= 2.98 Mtt= 1.08 Mpp=-4.06 Mrt= 0.52 Mrp=-0.93 Mtp= 1.92 Principal axes: T Val= 3.15 Plg=79 Azm= 26 N 1.69 8 160 P -4.84 8 251 Best Double Couple:Mo=4.3*10**19 NP1:Strike=350 Dip=38 Slip= 103 NP2: 155 53 80
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.
