USGS Body-Wave Moment Tensor Solution

NEAR EAST COAST OF HONSHU, JAPAN

12/12/29 14:59:36.82

Epicenter:  38.767  142.093
MW 5.4

USGS MOMENT TENSOR SOLUTION
Depth  34         No. of sta: 53
Moment Tensor;   Scale 10**17 Nm
  Mrr= 1.18       Mtt=-0.37
  Mpp=-0.81       Mrt= 0.67
  Mrp= 1.03       Mtp=-0.40
 Principal axes:
  T  Val=  1.72  Plg=66  Azm=304
  N       -0.13       1      212
  P       -1.59      24      121

Best Double Couple:Mo=1.7*10**17
 NP1:Strike= 32 Dip=69 Slip=  91
 NP2:       209     21        87

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