USGS/SLU Regional Moment Solution

SOUTH ISLAND OF NEW ZEALAND

11/06/13 02:20:48.09

Epicenter: -43.539  172.805
MW 5.9

USGS/SLU REGIONAL MOMENT TENSOR
Depth   7         No. of sta: 21
Moment Tensor;   Scale 10**17 Nm
  Mrr= 2.77       Mtt= 4.74
  Mpp=-7.50       Mrt= 4.44
  Mrp= 0.25       Mtp=-5.41
 Principal axes:
  T  Val=  9.36  Plg=32  Azm= 17
  N        0.48      56      216
  P       -9.84       9      113

Best Double Couple:Mo=9.6*10**17
 NP1:Strike=160 Dip=61 Slip=  18
 NP2:        61     74       150

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