USGS Centroid Moment Solution

OFF EAST COAST OF HONSHU, JAPAN

12/03/14 09:08:36.32

Epicenter:  40.920  144.912
MW 7.0

USGS CENTROID MOMENT TENSOR
12/03/14 09:08:51.40
Centroid:  40.807  144.496
Depth  20         No. of sta: 139
Moment Tensor;   Scale 10**19 Nm
  Mrr=-4.27       Mtt= 3.45
  Mpp= 0.82       Mrt=-2.40
  Mrp= 1.18       Mtp= 0.02
 Principal axes:
  T  Val=  4.17  Plg=17  Azm=186
  N        1.00       9      278
  P       -5.17      71       35

Best Double Couple:Mo=4.7*10**19
 NP1:Strike=103 Dip=62 Slip= -80
 NP2:       262     29      -108

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