USGS Body-Wave Moment Tensor Solution

NEAR EAST COAST OF HONSHU, JAPAN

13/04/17 12:03:31.63

Epicenter:  38.480  141.565
MW 5.9

USGS MOMENT TENSOR SOLUTION
Depth  52         No. of sta:127
Moment Tensor;   Scale 10**18 Nm
  Mrr= 0.70       Mtt=-0.09
  Mpp=-0.61       Mrt= 0.33
  Mrp= 0.69       Mtp=-0.31
 Principal axes:
  T  Val=  1.03  Plg=67  Azm=296
  N        0.06       0      205
  P       -1.08      23      115

Best Double Couple:Mo=1.1*10**18
 NP1:Strike= 25 Dip=68 Slip=  91
 NP2:       204     22        89

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