USGS WPhase Moment Solution


12/06/15  1:14:10

Epicenter:   5.649  126.476
MW 5.7

12/06/15 01:14:10.00
Centroid:    5.649  126.677
Depth  60         No. of sta: 23
Moment Tensor;   Scale 10**17 Nm
  Mrr= 2.80       Mtt=-0.50
  Mpp=-2.30       Mrt=-0.78
  Mrp= 2.07       Mtp=-2.16
 Principal axes:
  T  Val=  4.05  Plg=58  Azm=229
  N     = -0.04      28       22
  P     = -4.01      11      119

Best Double Couple:Mo=4.0*10**17
 NP1:Strike=240 Dip=41 Slip= 136
 NP2:         7     62        58

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.