USGS Centroid Moment Solution

COOK STRAIT, NEW ZEALAND

13/07/21 05:09:31.46

Epicenter: -41.704  174.337
MW 6.4

USGS CENTROID MOMENT TENSOR
13/07/21 05:09:54.79
Centroid: -41.420  174.368
Depth  10         No. of sta:128
Moment Tensor;   Scale 10**18 Nm
  Mrr= 1.23       Mtt= 4.69
  Mpp=-5.93       Mrt= 0.55
  Mrp= 1.01       Mtp=-1.77
 Principal axes:
  T  Val=  5.02  Plg= 6  Azm=  9
  N        1.35      80      243
  P       -6.37       8      100

Best Double Couple:Mo=5.7*10**18
 NP1:Strike=234 Dip=88 Slip=-170
 NP2:       144     80        -2

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