USGS WPhase Moment Solution

NEAR EAST COAST OF HONSHU, JAPAN

11/03/09  2:45:18

Epicenter:  38.510  142.792
MW 7.3

USGS/WPHASE CENTROID MOMENT TENSOR
11/03/09 02:45:18.00
Centroid:   38.510  142.992
Depth  35         No. of sta:138
Moment Tensor;   Scale 10**19 Nm
  Mrr= 4.67       Mtt=-0.33
  Mpp=-4.34       Mrt= 3.23
  Mrp= 8.06       Mtp=-1.31
 Principal axes:
  T  Val=  9.86  Plg=59  Azm=294
  N     =  0.03       2      200
  P     = -9.89      30      109

Best Double Couple:Mo=9.9*10**19
 NP1:Strike=192 Dip=14 Slip=  81
 NP2:        21     76        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 form 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