USGS WPhase Moment Solution

NEAR EAST COAST OF HONSHU, JAPAN

11/04/07 14:32:41

Epicenter:  38.252  141.639
MW 7.1

USGS/WPHASE CENTROID MOMENT TENSOR
11/04/07 14:32:41.00
Centroid:   38.252  142.039
Depth  49         No. of sta: 35
Moment Tensor;   Scale 10**19 Nm
  Mrr= 5.92       Mtt=-1.85
  Mpp=-4.06       Mrt=-1.43
  Mrp=-0.44       Mtp=-1.22
 Principal axes:
  T  Val=  6.17  Plg=80  Azm=172
  N     = -1.48       8       26
  P     = -4.70       5      295

Best Double Couple:Mo=5.6*10**19
 NP1:Strike= 17 Dip=40 Slip=  77
 NP2:       213     51       101

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