USGS WPhase Moment Solution


11/12/27 15:21:56

Epicenter:  51.857   95.824
MW 6.6

11/12/27 15:21:56.00
Centroid:   51.857   95.500
Depth  11         No. of sta: 68
Moment Tensor;   Scale 10**18 Nm
  Mrr= 0.68       Mtt=-4.77
  Mpp= 4.10       Mrt=-0.35
  Mrp=-0.52       Mtp= 7.61
 Principal axes:
  T  Val=  8.52  Plg= 4  Azm=119
  N     =  0.63      85      296
  P     = -9.15       0       29

Best Double Couple:Mo=8.9*10**18
 NP1:Strike=165 Dip=87 Slip= 177
 NP2:       255     87         3

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.