USGS WPhase Moment Solution

KURIL ISLANDS

12/ 7/ 8 11:33:3.00

Epicenter:  45.544  151.287
MW 6.0

USGS/WPHASE CENTROID MOMENT TENSOR
12/ 7/ 8 11:33: 3.00
Centroid:   45.544  151.287
Depth  30         No. of sta: 42
Moment Tensor;   Scale 10**18 Nm
  Mrr= 0.54       Mtt=-0.26
  Mpp=-0.29       Mrt= 0.57
  Mrp= 1.01       Mtp=-0.25
 Principal axes:
  T  Val=  1.30  Plg=56  Azm=294
  N     = -0.04       4       31
  P     = -1.25      32      124

Best Double Couple:Mo=1.3*10**18
 NP1:Strike=233 Dip=13 Slip= 112
 NP2:        31     78        85

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.