USGS Body-Wave Moment Tensor Solution

TONGA

13/02/15 03:02:23.28

Epicenter: -19.746 -174.471
MW 5.8

USGS MOMENT TENSOR SOLUTION
Depth  76         No. of sta: 67
Moment Tensor;   Scale 10**17 Nm
  Mrr=-4.64       Mtt= 0.75
  Mpp= 3.89       Mrt=-0.24
  Mrp= 5.21       Mtp=-0.82
 Principal axes:
  T  Val=  6.48  Plg=25  Azm=261
  N        0.63       4      353
  P       -7.11      65       92

Best Double Couple:Mo=6.8*10**17
 NP1:Strike=174 Dip=70 Slip= -85
 NP2:       341     20      -103

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