USGS Centroid Moment Solution


12/08/27 04:37:23.40

Epicenter:  12.282  -88.482
MW 7.4

12/08/27 04:37:50.29
Centroid:  11.984  -88.800
Depth  19         No. of sta: 90
Moment Tensor;   Scale 10**20 Nm
  Mrr= 0.69       Mtt=-0.52
  Mpp=-0.17       Mrt= 1.47
  Mrp=-0.80       Mtp= 0.17
 Principal axes:
  T  Val=  1.84  Plg=55  Azm= 30
  N       -0.10       2      298
  P       -1.74      35      207

Best Double Couple:Mo=1.8*10**20
 NP1:Strike=118 Dip=80 Slip=  92
 NP2:       289     11        81

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