USGS WPhase Moment Solution


13/ 2/28 14: 5:51.00

Epicenter:  50.934  157.339
MW 6.9

13/ 2/28 14: 5:51.00
Centroid:   51.034  157.498
Depth  45         No. of sta:102
Moment Tensor;   Scale 10**19 Nm
  Mrr= 1.81       Mtt=-0.56
  Mpp=-1.24       Mrt= 1.15
  Mrp= 1.19       Mtp=-0.80
 Principal axes:
  T  Val=  2.46  Plg=68  Azm=320
  N     = -0.06       5      218
  P     = -2.41      21      126

Best Double Couple:Mo=2.4*10**19
 NP1:Strike=207 Dip=24 Slip=  78
 NP2:        40     66        95

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.