USGS Centroid Moment Solution

12/09/09 05:39:36.48

Epicenter:  49.268  155.730
MW 6.0

12/09/09 05:39:51.79
Centroid:  49.972  155.722
Depth  47         No. of sta: 86
Moment Tensor;   Scale 10**18 Nm
  Mrr= 1.22       Mtt=-0.44
  Mpp=-0.78       Mrt=-0.15
  Mrp= 0.40       Mtp=-0.57
 Principal axes:
  T  Val=  1.34  Plg=74  Azm=236
  N       -0.11      14       34
  P       -1.23       6      125

Best Double Couple:Mo=1.3*10**18
 NP1:Strike= 22 Dip=52 Slip=  72
 NP2:       231     41       112

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