USGS WPhase Moment Solution
KERMADEC ISLANDS REGION
11/07/06 19:03:16 Epicenter: -29.312 -176.204 MW 7.6 USGS/WPHASE CENTROID MOMENT TENSOR 11/07/06 19:03:16.00 Centroid: -29.312 -175.859 Depth 15 No. of sta: 50 Moment Tensor; Scale 10**20 Nm Mrr=-2.31 Mtt=-0.62 Mpp= 2.93 Mrt=-0.38 Mrp= 0.59 Mtp= 0.07 Principal axes: T Val= 2.99 Plg= 6 Azm=270 N = -0.54 11 179 P = -2.45 76 27 Best Double Couple:Mo=2.8*10**20 NP1:Strike= 14 Dip=40 Slip= -71 NP2: 170 52 -105
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.
