USGS WPhase Moment Solution


12/ 9/ 9  5:39:20.00

Epicenter:  49.429  155.537
MW 6.0

12/ 9/ 9  5:39:20.00
Centroid:   49.329  155.844
Depth  60         No. of sta:105
Moment Tensor;   Scale 10**17 Nm
  Mrr= 9.50       Mtt=-3.32
  Mpp=-6.17       Mrt= 5.50
  Mrp= 6.22       Mtp=-3.95
 Principal axes:
  T  Val= 12.71  Plg=68  Azm=315
  N     = -0.60       2      217
  P     =-12.11      20      126

Best Double Couple:Mo=1.2*10**18
 NP1:Strike=211 Dip=24 Slip=  83
 NP2:        39     66        93

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.