USGS Body-Wave Moment Tensor Solution


13/03/01 13:20:49.96

Epicenter:  50.838  157.632
MW 6.4

Depth  35         No. of sta: 64
Moment Tensor;   Scale 10**18 Nm
  Mrr= 5.30       Mtt=-2.26
  Mpp=-3.04       Mrt= 1.58
  Mrp= 2.02       Mtp=-2.68
 Principal axes:
  T  Val=  5.89  Plg=77  Azm=305
  N        0.06       1       40
  P       -5.95      13      131

Best Double Couple:Mo=5.9*10**18
 NP1:Strike= 40 Dip=58 Slip=  89
 NP2:       222     32        92

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