USGS Body-Wave Moment Tensor Solution

TONGA

13/01/27 09:59:27.40

Epicenter: -16.105 -173.240
MW 5.7

USGS MOMENT TENSOR SOLUTION
Depth  19         No. of sta: 53
Moment Tensor;   Scale 10**17 Nm
  Mrr=-2.99       Mtt= 2.70
  Mpp= 0.30       Mrt= 0.23
  Mrp= 0.58       Mtp= 3.88
 Principal axes:
  T  Val=  5.59  Plg= 4  Azm=323
  N       -2.39      28      232
  P       -3.20      62       60

Best Double Couple:Mo=4.9*10**17
 NP1:Strike=210 Dip=54 Slip=-125
 NP2:        80     48       -51

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