USGS WPhase Moment Solution
SOUTH ISLAND OF NEW ZEALAND
11/12/23 0:58:36 Epicenter: -43.488 172.976 MW 5.8 USGS/WPHASE CENTROID MOMENT TENSOR 11/12/23 00:58:36.00 Centroid: -43.888 172.563 Depth 11 No. of sta: 18 Moment Tensor; Scale 10**17 Nm Mrr= 1.13 Mtt= 2.44 Mpp=-3.58 Mrt= 3.85 Mrp= 4.96 Mtp=-2.92 Principal axes: T Val= 5.87 Plg=46 Azm=345 N = 2.73 25 224 P = -8.61 32 117 Best Double Couple:Mo=7.2*10**17 NP1:Strike=154 Dip=27 Slip= 17 NP2: 49 82 116
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.
