USGS WPhase Moment Solution


13/ 4/ 6  4:42:36.00

Epicenter:  -3.531  138.455
MW 7.0

13/ 4/ 6  4:42:36.00
Centroid:   -3.331  138.455
Depth  70         No. of sta: 53
Moment Tensor;   Scale 10**19 Nm
  Mrr=-2.42       Mtt=-1.64
  Mpp= 4.06       Mrt= 1.49
  Mrp=-0.16       Mtp= 1.16
 Principal axes:
  T  Val=  4.29  Plg= 1  Azm=281
  N     = -0.63      39       12
  P     = -3.66      50      189

Best Double Couple:Mo=4.0*10**19
 NP1:Strike=338 Dip=56 Slip=-140
 NP2:       224     58       -41

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.