USGS WPhase Moment Solution

HINDU KUSH REGION, AFGHANISTAN

12/ 6/11  5:29:14.00

Epicenter:  36.082   69.316
MW 5.7

USGS/WPHASE CENTROID MOMENT TENSOR
12/ 6/11  5:29:14.00
Centroid:   36.082   69.316
Depth  19         No. of sta: 33
Moment Tensor;   Scale 10**17 Nm
  Mrr= 2.38       Mtt= 0.96
  Mpp=-3.34       Mrt=-1.86
  Mrp=-2.06       Mtp=-1.23
 Principal axes:
  T  Val=  3.83  Plg=59  Azm=161
  N     =  0.75      22       28
  P     = -4.58      20      289

Best Double Couple:Mo=4.3*10**17
 NP1:Strike=346 Dip=32 Slip=  43
 NP2:       217     69       114

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.