USGS Centroid Moment 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 CENTROID MOMENT TENSOR
 11/03/06 14:32:50.50
 Centroid:  -56.390  -26.591
 Depth  84         No. of sta:110
 Moment Tensor;   Scale 10**18 Nm
   Mrr= 2.80       Mtt= 1.42
   Mpp=-4.22       Mrt=-5.25
   Mrp= 4.94       Mtp= 1.48
  Principal axes:
   T  Val=  8.11  Plg=52  Azm=204
   N        0.27      19      320
   P       -8.37      31       63

 Best Double Couple:Mo=8.2*10**18
  NP1:Strike=316 Dip=79 Slip=  70
  NP2:       198     22       150
                                      
                                      

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