USGS WPhase Moment Solution
SOUTH OF KERMADEC ISLANDS
11/10/ 7 8:58:29.00 Epicenter: -32.387 -178.915 MW 6.1 USGS/WPHASE CENTROID MOMENT TENSOR 11/10/ 7 8:58:29.00 Centroid: -32.187 -178.797 Depth 50 No. of sta: 40 Moment Tensor; Scale 10**18 Nm Mrr= 1.48 Mtt=-0.15 Mpp=-1.33 Mrt= 0.60 Mrp= 0.92 Mtp=-0.67 Principal axes: T Val= 1.84 Plg=71 Azm=312 N = 0.14 4 207 P = -1.98 17 115 Best Double Couple:Mo=1.9*10**18 NP1:Strike=198 Dip=28 Slip= 79 NP2: 30 63 95
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.
