USGS Centroid Moment Solution

SOUTH ISLAND OF NEW ZEALAND

11/12/23 02:18:02.51

Epicenter: -43.503  172.837
MW 5.9

USGS CENTROID MOMENT TENSOR
11/12/23 02:18:25.50
Centroid: -43.601  173.045
Depth  17         No. of sta: 20
Moment Tensor;   Scale 10**17 Nm
  Mrr= 4.30       Mtt= 0.33
  Mpp=-4.63       Mrt= 4.06
  Mrp=-2.65       Mtp=-5.65
 Principal axes:
  T  Val=  9.01  Plg=46  Azm= 33
  N       -0.69      44      213
  P       -8.32       0      123

Best Double Couple:Mo=8.7*10**17
 NP1:Strike= 68 Dip=60 Slip= 144
 NP2:       178     59        36

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