USGS Centroid Moment Solution


12/09/09 05:39:20.71

Epicenter:  49.429  155.537
MW 6.0

12/09/09 05:39:52.29
Centroid:  49.904  155.716
Depth  46         No. of sta: 89
Moment Tensor;   Scale 10**18 Nm
  Mrr= 1.24       Mtt=-0.47
  Mpp=-0.77       Mrt=-0.16
  Mrp= 0.38       Mtp=-0.57
 Principal axes:
  T  Val=  1.35  Plg=75  Azm=235
  N       -0.12      14       35
  P       -1.23       5      126

Best Double Couple:Mo=1.3*10**18
 NP1:Strike= 23 Dip=52 Slip=  72
 NP2:       231     42       112

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