USGS Body-Wave Moment Tensor Solution

COOK STRAIT, NEW ZEALAND

13/07/21 05:09:31.26

Epicenter: -41.713  174.443
MW 6.4

USGS MOMENT TENSOR SOLUTION
Depth  14         No. of sta: 43
Moment Tensor;   Scale 10**18 Nm
  Mrr= 2.01       Mtt= 3.97
  Mpp=-5.98       Mrt=-2.04
  Mrp=-0.32       Mtp=-0.79
 Principal axes:
  T  Val=  5.28  Plg=32  Azm=183
  N        0.79      58       11
  P       -6.07       4      275

Best Double Couple:Mo=5.7*10**18
 NP1:Strike=324 Dip=65 Slip=  21
 NP2:       225     71       154

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