USGS Body-Wave Moment Tensor Solution


12/08/11 12:23:17.88

Epicenter:  38.322   46.888
MW 6.3

Depth   3         No. of sta: 82
Moment Tensor;   Scale 10**18 Nm
  Mrr= 0.20       Mtt= 0.58
  Mpp=-0.78       Mrt=-0.87
  Mrp=-0.39       Mtp=-3.84
 Principal axes:
  T  Val=  3.85  Plg= 7  Azm=219
  N        0.32      77       99
  P       -4.17      11      311

Best Double Couple:Mo=4.0*10**18
 NP1:Strike= 85 Dip=87 Slip=-167
 NP2:       355     77        -3

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