USGS WPhase Moment Solution
VANUATU
12/11/17 2:51:24.00 Epicenter: -15.026 167.426 MW 5.6 USGS/WPHASE CENTROID MOMENT TENSOR 12/11/17 2:51:24.00 Centroid: -14.926 167.218 Depth 120 No. of sta: 24 Moment Tensor; Scale 10**17 Nm Mrr= 2.98 Mtt= 0.37 Mpp=-3.35 Mrt=-0.51 Mrp= 0.24 Mtp=-0.32 Principal axes: T Val= 3.09 Plg=78 Azm=193 N = 0.29 11 4 P = -3.38 1 94 Best Double Couple:Mo=3.2*10**17 NP1:Strike=196 Dip=44 Slip= 106 NP2: 354 48 75
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.
