USGS Body-Wave Moment Tensor Solution

TONGA

13/02/10 09:37:10.51

Epicenter: -18.574 -174.632
MW 5.6

USGS MOMENT TENSOR SOLUTION
Depth 122         No. of sta: 10
Moment Tensor;   Scale 10**17 Nm
  Mrr=-1.90       Mtt=-0.56
  Mpp= 2.46       Mrt= 1.14
  Mrp=-2.22       Mtp= 0.55
 Principal axes:
  T  Val=  3.39  Plg=23  Azm= 91
  N        0.00      23      351
  P       -3.40      57      221

Best Double Couple:Mo=3.4*10**17
 NP1:Strike=217 Dip=30 Slip= -40
 NP2:       343     71      -114

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