USGS WPhase Moment Solution

HINDU KUSH REGION, AFGHANISTAN

12/12/29 17:50:53.00

Epicenter:  35.697   70.545
MW 5.5

USGS/WPHASE CENTROID MOMENT TENSOR
12/12/29 17:50:53.00
Centroid:   35.797   70.545
Depth 120         No. of sta: 35
Moment Tensor;   Scale 10**17 Nm
  Mrr= 1.41       Mtt=-1.53
  Mpp= 0.12       Mrt= 0.94
  Mrp= 0.97       Mtp=-0.13
 Principal axes:
  T  Val=  2.10  Plg=61  Azm=297
  N     = -0.20      19       69
  P     = -1.90      19      166

Best Double Couple:Mo=2.0*10**17
 NP1:Strike=286 Dip=31 Slip= 131
 NP2:        61     67        68

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.