USGS Centroid Moment Solution

NORTHWESTERN IRAN

12/08/11 12:23:17.83

Epicenter:  38.325   46.860
MW 6.4

USGS CENTROID MOMENT TENSOR
12/08/11 12:23:33.29
Centroid:  38.983   46.546
Depth  10         No. of sta: 103
Moment Tensor;   Scale 10**18 Nm
  Mrr= 0.49       Mtt= 0.36
  Mpp=-0.85       Mrt=-0.83
  Mrp=-3.18       Mtp=-4.81
 Principal axes:
  T  Val=  5.18  Plg=21  Azm= 48
  N        1.21      57      175
  P       -6.38      24      308

Best Double Couple:Mo=5.8*10**18
 NP1:Strike= 89 Dip=57 Slip=-178
 NP2:       357     88       -33

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