USGS WPhase Moment Solution

SOUTH SANDWICH ISLANDS REGION

11/03/06 14:32:36

Epicenter: -56.406  -27.028
MW 6.5

USGS/WPHASE CENTROID MOMENT TENSOR
11/03/06 14:32:36.00
Centroid:  -56.406  -26.628
Depth  86         No. of sta: 13
Moment Tensor;   Scale 10**18 Nm
  Mrr= 3.33       Mtt= 1.34
  Mpp=-4.68       Mrt=-4.98
  Mrp= 4.93       Mtp= 1.95
 Principal axes:
  T  Val=  8.04  Plg=54  Azm=203
  N     =  0.65      19      322
  P     = -8.69      28       63

Best Double Couple:Mo=8.4*10**18
 NP1:Strike=195 Dip=24 Slip= 145
 NP2:       318     77        70

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