USGS Centroid Moment Solution

SOUTH ISLAND OF NEW ZEALAND

 11/02/21 23:51:41.01
 SOUTH ISLAND OF NEW ZEALAND     
 Epicenter: -43.638  172.819
 MW 6.1

 USGS CENTROID MOMENT TENSOR
 11/02/21 23:52:02.79
 Centroid:  -43.566  172.733
 Depth  10         No. of sta: 36
 Moment Tensor;   Scale 10**18 Nm
   Mrr= 1.11       Mtt= 0.58
   Mpp=-1.69       Mrt= 0.20
   Mrp=-0.40       Mtp=-1.23
  Principal axes:
   T  Val=  1.47  Plg=45  Azm= 28
   N        0.78      44      198
   P       -2.25       5      293

 Best Double Couple:Mo=1.9*10**18
  NP1:Strike= 60 Dip=56 Slip= 148
  NP2:       170     64        39

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 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.

Moment Tensor Solution