USGS/SLU Regional Moment Solution

12/12/04 01:42:48.00

Epicenter:  61.230 -150.719
MW 5.7

USGS/SLU REGIONAL MOMENT TENSOR
Depth  68         No. of sta:102
Moment Tensor;   Scale 10**17 Nm
  Mrr= 2.47       Mtt=-3.69
  Mpp= 1.22       Mrt= 0.39
  Mrp= 2.74       Mtp= 2.04
 Principal axes:
  T  Val=  4.95  Plg=48  Azm=286
  N       -0.47      42      117
  P       -4.48       6       22

Best Double Couple:Mo=4.7*10**17
 NP1:Strike= 76 Dip=54 Slip=  34
 NP2:       324     63       138

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