USGS Body-Wave Moment Tensor Solution

SOUTH ISLAND OF NEW ZEALAND

11/12/23 00:58:36.86

Epicenter: -43.525  172.917
MW 5.7

USGS MOMENT TENSOR SOLUTION
Depth  10         No. of sta: 31
Moment Tensor;   Scale 10**17 Nm
  Mrr= 0.56       Mtt= 1.94
  Mpp=-2.49       Mrt= 0.07
  Mrp=-2.11       Mtp=-2.43
 Principal axes:
  T  Val=  3.37  Plg=22  Azm= 30
  N        0.95      59      160
  P       -4.33      22      291

Best Double Couple:Mo=3.9*10**17
 NP1:Strike= 71 Dip=59 Slip=-180
 NP2:       341     90       -31

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