USGS Centroid Moment Solution

NEAR EAST COAST OF HONSHU, JAPAN

13/04/17 12:03:31.63

Epicenter:  38.480  141.565
MW 5.9

USGS CENTROID MOMENT TENSOR
13/04/17 12:03:43.59
Centroid:  39.031  142.787
Depth  66         No. of sta: 39
Moment Tensor;   Scale 10**17 Nm
  Mrr= 7.09       Mtt=-1.43
  Mpp=-5.65       Mrt= 0.67
  Mrp= 6.31       Mtp=-1.03
 Principal axes:
  T  Val=  9.69  Plg=68  Azm=273
  N       -1.23       3       10
  P       -8.46      22      101

Best Double Couple:Mo=9.1*10**17
 NP1:Strike=  8 Dip=67 Slip=  87
 NP2:       196     23        97

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