USGS Body-Wave Moment Tensor Solution

OFF EAST COAST OF HONSHU, JAPAN

12/10/01 22:21:45.51

Epicenter:  39.851  143.141
MW 6.0

USGS MOMENT TENSOR SOLUTION
Depth  16         No. of sta: 91
Moment Tensor;   Scale 10**18 Nm
  Mrr= 0.65       Mtt=-0.11
  Mpp=-0.53       Mrt= 0.60
  Mrp= 0.94       Mtp=-0.42
 Principal axes:
  T  Val=  1.26  Plg=61  Azm=304
  N        0.14       1      212
  P       -1.40      29      122

Best Double Couple:Mo=1.3*10**18
 NP1:Strike= 33 Dip=74 Slip=  91
 NP2:       210     16        88

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