USGS Centroid Moment Solution
VANUATU
12/04/14 22:05:26.99 Epicenter: -18.990 168.739 MW 6.3 USGS CENTROID MOMENT TENSOR 12/04/14 22:05:45.90 Centroid: -18.613 168.611 Depth 10 No. of sta: 95 Moment Tensor; Scale 10**18 Nm Mrr=-3.00 Mtt= 3.31 Mpp=-0.31 Mrt=-0.61 Mrp= 1.43 Mtp= 1.22 Principal axes: T Val= 3.69 Plg= 2 Azm=163 N 0.09 27 254 P -3.78 63 70 Best Double Couple:Mo=3.7*10**18 NP1:Strike= 97 Dip=52 Slip= -56 NP2: 229 49 -126
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.
