USGS Centroid Moment Solution


13/03/01 12:53:51.63

Epicenter:  50.917  157.530
MW 6.4

13/03/01 12:54:06.70
Centroid:  50.492  158.498
Depth  48         No. of sta: 34
Moment Tensor;   Scale 10**18 Nm
  Mrr= 4.37       Mtt=-1.58
  Mpp=-2.79       Mrt= 1.40
  Mrp= 2.70       Mtp=-1.82
 Principal axes:
  T  Val=  5.36  Plg=72  Azm=292
  N       -0.29       4       33
  P       -5.07      18      124

Best Double Couple:Mo=5.2*10**18
 NP1:Strike= 31 Dip=63 Slip=  86
 NP2:       220     27        98

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