USGS WPhase Moment Solution

EASTERN IRAN

12/12/ 5 17: 8:12.00

Epicenter:  33.490   59.554
MW 5.8

USGS/WPHASE CENTROID MOMENT TENSOR
12/12/ 5 17: 8:12.00
Centroid:   33.490   59.314
Depth  11         No. of sta: 42
Moment Tensor;   Scale 10**17 Nm
  Mrr= 2.40       Mtt=-1.79
  Mpp=-0.60       Mrt= 0.78
  Mrp= 3.72       Mtp= 3.57
 Principal axes:
  T  Val=  5.90  Plg=45  Azm=300
  N     = -0.57      39      151
  P     = -5.33      15       47

Best Double Couple:Mo=5.6*10**17
 NP1:Strike= 96 Dip=45 Slip=  26
 NP2:       347     72       132

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.