USGS WPhase Moment Solution


13/04/19  3:05:53

Epicenter:  46.181  150.796
MW 7.2

13/04/19 03:05:53.00
Centroid:   46.081  150.651
Depth 110         No. of sta: 98
Moment Tensor;   Scale 10**19 Nm
  Mrr=-1.61       Mtt= 3.61
  Mpp=-2.00       Mrt= 7.16
  Mrp= 3.38       Mtp=-0.29
 Principal axes:
  T  Val=  8.90  Plg=36  Azm=348
  N     = -0.82      15      246
  P     = -8.08      49      136

Best Double Couple:Mo=8.5*10**19
 NP1:Strike=132 Dip=17 Slip= -23
 NP2:       244     83      -106

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.