USGS WPhase Moment Solution


13/04/16 10:44:20

Epicenter:  28.106   62.053
MW 7.7

13/04/16 10:44:20.00
Centroid:   28.006   62.166
Depth  50         No. of sta:427
Moment Tensor;   Scale 10**20 Nm
  Mrr=-4.19       Mtt= 4.15
  Mpp= 0.04       Mrt= 1.30
  Mrp= 1.96       Mtp= 1.80
 Principal axes:
  T  Val=  5.23  Plg=11  Azm=336
  N     = -0.23      16      243
  P     = -4.99      69      101

Best Double Couple:Mo=5.1*10**20
 NP1:Strike= 87 Dip=36 Slip= -61
 NP2:       233     59      -109

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.