USGS Body-Wave Moment Tensor Solution

SOUTH ISLAND OF NEW ZEALAND

11/12/23 02:18:02.51

Epicenter: -43.503  172.837
MW 5.8

USGS MOMENT TENSOR SOLUTION
Depth   8         No. of sta: 20
Moment Tensor;   Scale 10**17 Nm
  Mrr= 1.98       Mtt=-1.62
  Mpp=-0.36       Mrt=-2.27
  Mrp=-5.75       Mtp=-2.71
 Principal axes:
  T  Val=  6.68  Plg=51  Azm= 91
  N        0.59      19      206
  P       -7.27      33      309

Best Double Couple:Mo=7.0*10**17
 NP1:Strike= 87 Dip=22 Slip= 153
 NP2:       203     80        70

Moment Tensor Solution
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.

Moment Tensor Solution