USGS Body-Wave Moment Tensor Solution

 11/02/11 20:05:31.66
 Epicenter: -36.397  -72.950
 MW 6.8

 Depth  26         No. of sta: 49
 Moment Tensor;   Scale 10**19 Nm
   Mrr= 0.55       Mtt= 0.06
   Mpp=-0.61       Mrt= 0.33
   Mrp=-1.55       Mtp=-0.10
  Principal axes:
   T  Val=  1.69  Plg=54  Azm= 70
   N        0.00       7      171
   P       -1.69      35      266

 Best Double Couple:Mo=1.7*10**19
  NP1:Strike= 28 Dip=12 Slip= 128
  NP2:       169     80        82

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 form 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