USGS Body-Wave Moment Tensor Solution

SOUTH ISLAND OF NEW ZEALAND

11/06/13 02:20:48.09

Epicenter: -43.539  172.805
MW 5.9

USGS MOMENT TENSOR SOLUTION
Depth   7         No. of sta: 34
Moment Tensor;   Scale 10**17 Nm
  Mrr= 3.33       Mtt= 4.16
  Mpp=-7.49       Mrt= 3.02
  Mrp= 0.21       Mtp=-3.89
 Principal axes:
  T  Val=  7.37  Plg=36  Azm= 14
  N        1.41      54      205
  P       -8.77       5      108

Best Double Couple:Mo=8.2*10**17
 NP1:Strike= 56 Dip=70 Slip= 149
 NP2:       157     62        23

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