USGS/SLU Regional Moment Solution

OFF E. COAST OF N. ISLAND, N.Z.

12/10/30 13:12:29.14

Epicenter: -37.949  177.681
MW 4.9

USGS/SLU REGIONAL MOMENT TENSOR
Depth  71         No. of sta: 14
Moment Tensor;   Scale 10**16 Nm
  Mrr= 2.55       Mtt=-1.57
  Mpp=-0.98       Mrt=-1.78
  Mrp= 0.12       Mtp=-1.65
 Principal axes:
  T  Val=  3.33  Plg=65  Azm=204
  N       -0.08      21       60
  P       -3.26      13      325

Best Double Couple:Mo=3.3*10**16
 NP1:Strike=252 Dip=62 Slip= 114
 NP2:        29     36        53

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