USGS WPhase Moment Solution


12/ 2/14  8:19:58.00

Epicenter: -10.387  161.262
MW 6.4

12/ 2/14  8:19:58.00
Centroid:  -10.287  161.160
Depth  60         No. of sta: 37
Moment Tensor;   Scale 10**18 Nm
  Mrr= 2.03       Mtt=-1.68
  Mpp=-0.35       Mrt=-2.81
  Mrp=-0.94       Mtp= 2.58
 Principal axes:
  T  Val=  4.49  Plg=48  Azm=140
  N     = -0.29      36      286
  P     = -4.20      17       30

Best Double Couple:Mo=4.4*10**18
 NP1:Strike=161 Dip=42 Slip= 152
 NP2:       273     71        51

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.