USGS WPhase Moment Solution


13/02/16  4:37:36

Epicenter:   5.758  125.837
MW 6.1

13/02/16 04:37:36.00
Centroid:    5.858  125.938
Depth 120         No. of sta: 31
Moment Tensor;   Scale 10**18 Nm
  Mrr= 1.48       Mtt=-0.10
  Mpp=-1.38       Mrt=-0.71
  Mrp= 1.32       Mtp= 0.28
 Principal axes:
  T  Val=  2.14  Plg=65  Azm=232
  N     = -0.10       7      339
  P     = -2.04      22       72

Best Double Couple:Mo=2.1*10**18
 NP1:Strike=178 Dip=23 Slip= 109
 NP2:       337     68        82

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.