USGS Centroid Moment Solution

FOX ISLANDS, ALEUTIAN ISLANDS

11/09/02 10:55:55.54

Epicenter:  52.196 -171.656
MW 6.8

USGS CENTROID MOMENT TENSOR
11/09/02 10:56:13.40
Centroid:  52.124 -171.788
Depth  43         No. of sta: 73
Moment Tensor;   Scale 10**19 Nm
  Mrr= 1.20       Mtt= 0.61
  Mpp=-1.81       Mrt= 0.73
  Mrp= 1.02       Mtp= 0.76
 Principal axes:
  T  Val=  2.10  Plg=52  Azm=330
  N        0.11      35      179
  P       -2.22      14       79

Best Double Couple:Mo=2.2*10**19
 NP1:Strike= 15 Dip=67 Slip= 128
 NP2:       131     43        34

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