USGS Body-Wave Moment Tensor Solution
KERMADEC ISLANDS REGION
11/10/21 17:57:16.88 Epicenter: -28.999 -176.183 MW 7.4 USGS MOMENT TENSOR SOLUTION Depth 42 No. of sta: 53 Moment Tensor; Scale 10**20 Nm Mrr= 1.35 Mtt=-1.48 Mpp= 0.13 Mrt= 0.43 Mrp= 0.09 Mtp=-0.66 Principal axes: T Val= 1.42 Plg=82 Azm= 4 N 0.36 3 251 P -1.78 8 160 Best Double Couple:Mo=1.6*10**20 NP1:Strike= 73 Dip=53 Slip= 94 NP2: 247 37 85
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.
