USGS WPhase Moment Solution

SOUTHERN IRAN

13/ 4/ 9 11:52:50.00

Epicenter:  28.499   51.590
MW 6.4

USGS/WPHASE CENTROID MOMENT TENSOR
13/ 4/ 9 11:52:50.00
Centroid:   28.399   51.249
Depth  11         No. of sta: 31
Moment Tensor;   Scale 10**18 Nm
  Mrr= 2.83       Mtt=-1.12
  Mpp=-1.72       Mrt=-3.12
  Mrp= 2.89       Mtp= 2.54
 Principal axes:
  T  Val=  4.89  Plg=63  Azm=215
  N     =  1.11       4      314
  P     = -6.00      25       46

Best Double Couple:Mo=5.5*10**18
 NP1:Strike=147 Dip=20 Slip= 103
 NP2:       313     71        85

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.