USGS Body-Wave Moment Tensor Solution


12/07/08 11:33:02.54

Epicenter:  45.495  151.354
MW 5.8

Depth  20         No. of sta: 98
Moment Tensor;   Scale 10**17 Nm
  Mrr= 4.63       Mtt=-1.19
  Mpp=-3.44       Mrt= 2.48
  Mrp= 3.96       Mtp=-1.72
 Principal axes:
  T  Val=  6.62  Plg=67  Azm=304
  N       -0.27       2      210
  P       -6.35      23      120

Best Double Couple:Mo=6.5*10**17
 NP1:Strike= 31 Dip=68 Slip=  92
 NP2:       206     22        86

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