USGS Centroid Moment Solution
VANUATU
11/08/20 18:19:23.79 Epicenter: -18.327 168.133 MW 7.1 USGS CENTROID MOMENT TENSOR 11/08/20 18:19:46.20 Centroid: -18.345 167.968 Depth 38 No. of sta: 118 Moment Tensor; Scale 10**19 Nm Mrr= 4.51 Mtt=-0.42 Mpp=-4.09 Mrt= 1.14 Mrp=-0.87 Mtp= 1.37 Principal axes: T Val= 4.80 Plg=78 Azm= 18 N -0.10 9 159 P -4.70 7 250 Best Double Couple:Mo=4.8*10**19 NP1:Strike=351 Dip=38 Slip= 105 NP2: 152 53 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.
