USGS Body-Wave Moment Tensor Solution

SOUTH SANDWICH ISLANDS REGION

 11/03/06 14:32:35.96
 SOUTH SANDWICH ISLANDS REGION   
 Epicenter: -56.387  -27.019
 MW 6.5

 USGS MOMENT TENSOR SOLUTION
 Depth  86         No. of sta: 41
 Moment Tensor;   Scale 10**18 Nm
   Mrr= 4.16       Mtt=-1.85
   Mpp=-2.30       Mrt=-3.70
   Mrp= 3.96       Mtp= 1.92
  Principal axes:
   T  Val=  6.86  Plg=63  Azm=226
   N       -0.14       1      317
   P       -6.71      26       48

 Best Double Couple:Mo=6.8*10**18
  NP1:Strike=317 Dip=72 Slip=  89
  NP2:       139     19        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 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