USGS Body-Wave Moment Tensor Solution

NEAR EAST COAST OF HONSHU, JAPAN

13/02/19 12:27:38.46

Epicenter:  35.253  140.917
MW 5.3

USGS MOMENT TENSOR SOLUTION
Depth  20         No. of sta: 46
Moment Tensor;   Scale 10**17 Nm
  Mrr= 0.57       Mtt=-0.75
  Mpp= 0.18       Mrt= 0.79
  Mrp= 0.51       Mtp=-0.34
 Principal axes:
  T  Val=  1.07  Plg=61  Azm=309
  N        0.24      12       62
  P       -1.30      26      158

Best Double Couple:Mo=1.2*10**17
 NP1:Strike= 58 Dip=72 Slip=  77
 NP2:       274     22       125

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