USGS Centroid Moment Solution

SOUTHEASTERN ALASKA

13/01/31 09:53:39.00

Epicenter:  55.405 -134.915
MW 5.9

USGS CENTROID MOMENT TENSOR
13/01/31 09:54:12.50
Centroid:  56.243 -135.275
Depth  26         No. of sta: 28
Moment Tensor;   Scale 10**17 Nm
  Mrr=-1.22       Mtt= 3.75
  Mpp=-2.53       Mrt= 1.71
  Mrp= 1.23       Mtp= 7.86
 Principal axes:
  T  Val=  9.49  Plg=11  Azm=326
  N       -1.63      79      149
  P       -7.85       1       56

Best Double Couple:Mo=8.7*10**17
 NP1:Strike= 10 Dip=83 Slip= 172
 NP2:       101     82         8

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