USGS WPhase Moment Solution
VANUATU
12/07/06 2:28:22 Epicenter: -14.664 167.357 MW 6.3 USGS/WPHASE CENTROID MOMENT TENSOR 12/07/06 02:28:22.00 Centroid: -14.464 167.046 Depth 170 No. of sta: 59 Moment Tensor; Scale 10**18 Nm Mrr= 3.38 Mtt=-0.50 Mpp=-2.88 Mrt=-1.03 Mrp=-1.38 Mtp= 1.41 Principal axes: T Val= 4.05 Plg=68 Azm=139 N = -0.41 20 340 P = -3.64 7 247 Best Double Couple:Mo=3.9*10**18 NP1:Strike=316 Dip=42 Slip= 58 NP2: 176 55 115
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.
