USGS/SLU Regional 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 6.2

 USGS/SLU REGIONAL MOMENT TENSOR
 Depth  14         No. of sta: 36
 Moment Tensor;   Scale 10**18 Nm
   Mrr= 1.11       Mtt=-0.53
   Mpp=-0.58       Mrt= 1.12
   Mrp= 0.91       Mtp=-1.81
  Principal axes:
   T  Val=  1.68  Plg=63  Azm=  1
   N        1.20      18      232
   P       -2.88      20      135

 Best Double Couple:Mo=2.5*10**18
  NP1:Strike=198 Dip=30 Slip=  52
  NP2:        60     67       109
                                      
                                      

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