USGS/SLU Regional Moment Solution

12/12/01 08:00:58.00

Epicenter:  58.425 -154.123
MW 5.4

USGS/SLU REGIONAL MOMENT TENSOR
Depth  92         No. of sta: 31
Moment Tensor;   Scale 10**17 Nm
  Mrr= 0.06       Mtt=-0.54
  Mpp= 0.49       Mrt= 0.96
  Mrp= 0.79       Mtp= 0.46
 Principal axes:
  T  Val=  1.55  Plg=39  Azm=303
  N       -0.30      29       59
  P       -1.25      38      175

Best Double Couple:Mo=1.4*10**17
 NP1:Strike= 59 Dip=90 Slip=  61
 NP2:       329     29       179

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