USGS Body-Wave Moment Tensor Solution

EASTERN SEA OF JAPAN

13/01/22 13:29:22.89

Epicenter:  44.520  140.913
MW 5.4

USGS MOMENT TENSOR SOLUTION
Depth 233         No. of sta: 27
Moment Tensor;   Scale 10**17 Nm
  Mrr=-0.78       Mtt=-0.20
  Mpp= 0.98       Mrt= 0.81
  Mrp= 0.18       Mtp=-0.79
 Principal axes:
  T  Val=  1.40  Plg= 6  Azm= 61
  N        0.10      41      325
  P       -1.50      48      158

Best Double Couple:Mo=1.5*10**17
 NP1:Strike=187 Dip=53 Slip= -35
 NP2:       299     63      -137

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