USGS WPhase Moment Solution


12/ 9/12  3:27:45.00

Epicenter:  34.811   24.064
MW 5.5

12/ 9/12  3:27:45.00
Centroid:   34.911   23.942
Depth  30         No. of sta: 29
Moment Tensor;   Scale 10**17 Nm
  Mrr= 0.83       Mtt=-0.63
  Mpp=-0.20       Mrt= 1.66
  Mrp=-1.09       Mtp= 0.31
 Principal axes:
  T  Val=  2.17  Plg=55  Azm= 35
  N     = -0.05       1      302
  P     = -2.12      33      211

Best Double Couple:Mo=2.1*10**17
 NP1:Strike=293 Dip=11 Slip=  81
 NP2:       123     79        92

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.