USGS Centroid Moment Solution
VANUATU
11/08/20 16:54:58.34 Epicenter: -18.417 168.075 MW 7.1 USGS CENTROID MOMENT TENSOR 11/08/20 16:55:24.90 Centroid: -18.444 167.780 Depth 36 No. of sta: 159 Moment Tensor; Scale 10**19 Nm Mrr= 5.84 Mtt=-0.63 Mpp=-5.21 Mrt= 1.69 Mrp=-1.96 Mtp= 1.62 Principal axes: T Val= 6.46 Plg=76 Azm= 34 N -0.26 8 159 P -6.20 11 250 Best Double Couple:Mo=6.3*10**19 NP1:Strike=351 Dip=34 Slip= 104 NP2: 153 57 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.
