USGS/SLU Regional Moment Solution

13/04/07 09:34:38.00

Epicenter:  66.224 -148.746
MW 3.7

USGS/SLU REGIONAL MOMENT TENSOR
Depth  15         No. of sta: 17
Moment Tensor;   Scale 10**14 Nm
  Mrr=-3.28       Mtt=-0.51
  Mpp= 3.78       Mrt=-0.71
  Mrp=-1.06       Mtp=-1.77
 Principal axes:
  T  Val=  4.50  Plg= 6  Azm= 71
  N       -0.75      21      163
  P       -3.75      68      327

Best Double Couple:Mo=4.2*10**14
 NP1:Strike=139 Dip=43 Slip=-122
 NP2:       360     54       -64

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