USGS/SLU Regional Moment Solution

SOUTHEASTERN ALASKA

13/01/05 12:28:27.00

Epicenter:  55.081 -134.695
MW 5.4

USGS/SLU REGIONAL MOMENT TENSOR
Depth  16         No. of sta: 16
Moment Tensor;   Scale 10**17 Nm
  Mrr= 0.11       Mtt=-1.04
  Mpp= 0.93       Mrt=-0.09
  Mrp=-0.86       Mtp= 0.77
 Principal axes:
  T  Val=  1.66  Plg=29  Azm=107
  N       -0.32      60      309
  P       -1.34       9      202

Best Double Couple:Mo=1.5*10**17
 NP1:Strike=152 Dip=77 Slip= 152
 NP2:       248     63        15

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