USGS Centroid Moment Solution

NEAR EAST COAST OF HONSHU, JAPAN

11/03/11 05:46:23.82

Epicenter:  38.308  142.383
MW 9.0

USGS CENTROID MOMENT TENSOR
11/03/11 05:47:47.20
Centroid:  38.486  142.597
Depth  10         No. of sta: 151
Moment Tensor;   Scale 10**22 Nm
  Mrr= 2.03       Mtt=-0.16
  Mpp=-1.87       Mrt= 2.06
  Mrp= 3.49       Mtp=-0.60
 Principal axes:
  T  Val=  4.57  Plg=58  Azm=306
  N       -0.05       5      208
  P       -4.52      32      115

Best Double Couple:Mo=4.5*10**22
 NP1:Strike= 29 Dip=77 Slip=  95
 NP2:       187     14        68

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