USGS WPhase Moment Solution


12/ 8/26 15: 5:35.00

Epicenter:   2.230  126.865
MW 6.6

12/ 8/26 15: 5:35.00
Centroid:    2.130  126.865
Depth 100         No. of sta: 36
Moment Tensor;   Scale 10**18 Nm
  Mrr= 4.20       Mtt= 3.88
  Mpp=-8.08       Mrt=-4.97
  Mrp=-0.71       Mtp= 2.83
 Principal axes:
  T  Val=  9.37  Plg=44  Azm=168
  N     = -0.64      45      344
  P     = -8.73       2       76

Best Double Couple:Mo=9.1*10**18
 NP1:Strike=203 Dip=59 Slip= 147
 NP2:       312     62        36

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.