USGS WPhase Moment Solution
SOUTH ISLAND OF NEW ZEALAND
11/02/21 23:51:42 Epicenter: -43.513 172.438 MW 6.1 USGS/WPHASE CENTROID MOMENT TENSOR 11/02/21 23:51:42.00 Centroid: -43.513 172.438 Depth 15 No. of sta: 17 Moment Tensor; Scale 10**19 Nm Mrr= 0.06 Mtt= 0.06 Mpp=-0.12 Mrt= 0.05 Mrp=-0.05 Mtp=-0.10 Principal axes: T Val= 0.16 Plg=37 Azm= 28 N = 0.01 51 194 P = -0.17 6 293 Best Double Couple:Mo=0.2*10**19 NP1:Strike= 64 Dip=59 Slip= 156 NP2: 166 70 33
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 form 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.
