USGS Centroid Moment Solution


11/08/20 18:19:23.79

Epicenter: -18.327  168.133
MW 7.1

11/08/20 18:19:46.20
Centroid: -18.345  167.968
Depth  38         No. of sta: 118
Moment Tensor;   Scale 10**19 Nm
  Mrr= 4.51       Mtt=-0.42
  Mpp=-4.09       Mrt= 1.14
  Mrp=-0.87       Mtp= 1.37
 Principal axes:
  T  Val=  4.80  Plg=78  Azm= 18
  N       -0.10       9      159
  P       -4.70       7      250

Best Double Couple:Mo=4.8*10**19
 NP1:Strike=351 Dip=38 Slip= 105
 NP2:       152     53        78

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