USGS Centroid Moment Solution
SOUTH OF KERMADEC ISLANDS
11/10/07 08:58:29.75 Epicenter: -32.389 -178.902 MW 6.1 USGS CENTROID MOMENT TENSOR 11/10/07 08:58:50.20 Centroid: -31.922 -178.987 Depth 52 No. of sta: 19 Moment Tensor; Scale 10**18 Nm Mrr= 1.97 Mtt=-0.41 Mpp=-1.56 Mrt=-0.10 Mrp= 0.29 Mtp=-0.70 Principal axes: T Val= 2.01 Plg=83 Azm=233 N -0.10 6 24 P -1.90 3 115 Best Double Couple:Mo=2.0*10**18 NP1:Strike= 19 Dip=49 Slip= 82 NP2: 211 42 99
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.
