USGS WPhase Moment Solution


12/ 9/11  1:28:19.00

Epicenter:  45.294  151.189
MW 5.6

12/ 9/11  1:28:19.00
Centroid:   45.394  151.331
Depth  17         No. of sta: 35
Moment Tensor;   Scale 10**17 Nm
  Mrr= 1.40       Mtt=-0.57
  Mpp=-0.83       Mrt= 1.20
  Mrp= 2.92       Mtp=-0.75
 Principal axes:
  T  Val=  3.50  Plg=56  Azm=285
  N     = -0.06       6       25
  P     = -3.44      32      119

Best Double Couple:Mo=3.5*10**17
 NP1:Strike=235 Dip=14 Slip= 120
 NP2:        24     78        83

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.