USGS Body-Wave Moment Tensor Solution

TONGA

13/02/07 07:19:51.43

Epicenter: -15.599 -173.144
MW 5.7

USGS MOMENT TENSOR SOLUTION
Depth  18         No. of sta:107
Moment Tensor;   Scale 10**17 Nm
  Mrr= 3.28       Mtt=-0.58
  Mpp=-2.70       Mrt= 0.74
  Mrp= 3.15       Mtp=-0.09
 Principal axes:
  T  Val=  4.71  Plg=66  Azm=287
  N       -0.62       4      188
  P       -4.09      24       97

Best Double Couple:Mo=4.4*10**17
 NP1:Strike= 10 Dip=69 Slip=  94
 NP2:       179     22        79

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