USGS Body-Wave Moment Tensor Solution

OFF EAST COAST OF HONSHU, JAPAN

11/07/10 00:57:12.63

Epicenter:  38.045  143.289
MW 7.0

USGS MOMENT TENSOR SOLUTION
Depth  25         No. of sta: 92
Moment Tensor;   Scale 10**19 Nm
  Mrr= 0.37       Mtt=-3.41
  Mpp= 3.04       Mrt= 0.25
  Mrp= 0.79       Mtp= 0.81
 Principal axes:
  T  Val=  3.36  Plg=15  Azm=277
  N        0.15      75       89
  P       -3.52       2      187

Best Double Couple:Mo=3.4*10**19
 NP1:Strike=321 Dip=78 Slip= 171
 NP2:        53     81        12

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