USGS/SLU Regional Moment Solution

SOUTH ISLAND OF NEW ZEALAND

13/01/19 08:15:08.43

Epicenter: -43.526  172.495
MW 4.2

USGS/SLU REGIONAL MOMENT TENSOR
Depth   6         No. of sta: 23
Moment Tensor;   Scale 10**15 Nm
  Mrr=-0.38       Mtt= 0.89
  Mpp=-0.50       Mrt=-1.01
  Mrp=-0.44       Mtp=-2.11
 Principal axes:
  T  Val=  2.52  Plg=12  Azm=213
  N       -0.05      62      101
  P       -2.47      25      309

Best Double Couple:Mo=2.5*10**15
 NP1:Strike= 83 Dip=81 Slip=-153
 NP2:       349     64       -10

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