USGS WPhase Moment Solution


12/10/14  4:58:7.00

Epicenter:  -7.191  156.063
MW 5.8

12/10/14  4:58: 7.00
Centroid:   -7.091  155.962
Depth  60         No. of sta: 58
Moment Tensor;   Scale 10**17 Nm
  Mrr= 5.70       Mtt=-3.41
  Mpp=-2.29       Mrt= 0.63
  Mrp= 0.07       Mtp= 3.38
 Principal axes:
  T  Val=  5.76  Plg=84  Azm=332
  N     =  0.53       5      130
  P     = -6.29       2      220

Best Double Couple:Mo=6.0*10**17
 NP1:Strike=315 Dip=43 Slip=  97
 NP2:       125     47        83

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

Details on the W-phase inversion algorithm.