USGS WPhase Moment Solution
SOUTH OF KERMADEC ISLANDS
13/ 1/ 8 21:26:55.00 Epicenter: -34.429 179.170 MW 5.7 USGS/WPHASE CENTROID MOMENT TENSOR 13/ 1/ 8 21:26:55.00 Centroid: -34.629 179.291 Depth 17 No. of sta: 19 Moment Tensor; Scale 10**17 Nm Mrr= 0.09 Mtt=-3.09 Mpp= 3.00 Mrt=-1.72 Mrp= 2.59 Mtp= 1.74 Principal axes: T Val= 4.58 Plg=28 Azm=276 N = 0.22 48 149 P = -4.79 27 22 Best Double Couple:Mo=4.7*10**17 NP1:Strike= 59 Dip=48 Slip= 0 NP2: 329 90 138
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.
