USGS Body-Wave Moment Tensor Solution


12/09/30 16:31:37.00

Epicenter:   1.953  -76.340
MW 7.2

Depth 178         No. of sta: 85
Moment Tensor;   Scale 10**19 Nm
  Mrr=-6.20       Mtt= 5.62
  Mpp= 0.58       Mrt=-4.31
  Mrp= 0.24       Mtp= 4.02
 Principal axes:
  T  Val=  8.77  Plg=14  Azm=154
  N       -0.88      18      249
  P       -7.89      66       29

Best Double Couple:Mo=8.4*10**19
 NP1:Strike= 79 Dip=62 Slip= -69
 NP2:       220     35      -124

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