USGS WPhase Moment Solution

SOUTH ISLAND OF NEW ZEALAND

11/06/13  2:20:50

Epicenter: -43.580  172.740
MW 5.9

USGS/WPHASE CENTROID MOMENT TENSOR
11/06/13 02:20:50.00
Centroid:  -43.680  172.740
Depth  11         No. of sta: 18
Moment Tensor;   Scale 10**17 Nm
  Mrr= 1.80       Mtt= 4.41
  Mpp=-6.21       Mrt= 3.88
  Mrp=-1.54       Mtp=-6.02
 Principal axes:
  T  Val=  9.41  Plg=28  Azm= 23
  N     = -0.48      61      206
  P     = -8.93       1      114

Best Double Couple:Mo=9.2*10**17
 NP1:Strike=163 Dip=69 Slip=  20
 NP2:        66     71       158

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