USGS Body-Wave Moment Tensor Solution

TONGA

13/05/23 21:07:46.52

Epicenter: -20.545 -175.740
MW 6.3

USGS MOMENT TENSOR SOLUTION
Depth 149         No. of sta: 35
Moment Tensor;   Scale 10**18 Nm
  Mrr=-0.40       Mtt=-0.50
  Mpp= 0.90       Mrt=-0.64
  Mrp=-2.81       Mtp= 0.88
 Principal axes:
  T  Val=  3.43  Plg=37  Azm=109
  N       -0.80      11       11
  P       -2.63      51      268

Best Double Couple:Mo=3.1*10**18
 NP1:Strike=246 Dip=13 Slip= -35
 NP2:        10     83      -101

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