USGS WPhase Moment Solution


12/ 6/15  1:14:7.00

Epicenter:   5.718  126.354
MW 5.7

12/ 6/15  1:14: 7.00
Centroid:    5.718  126.354
Depth  50         No. of sta: 18
Moment Tensor;   Scale 10**17 Nm
  Mrr= 2.83       Mtt=-0.91
  Mpp=-1.92       Mrt=-0.77
  Mrp= 3.39       Mtp=-2.04
 Principal axes:
  T  Val=  5.05  Plg=56  Azm=240
  N     = -0.70      25       16
  P     = -4.36      20      116

Best Double Couple:Mo=4.7*10**17
 NP1:Strike=243 Dip=33 Slip= 142
 NP2:         6     70        63

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.