USGS Body-Wave Moment Tensor Solution

OFFSHORE CHIAPAS, MEXICO

13/01/11 16:30:43.30

Epicenter:  14.880  -92.676
MW 5.3

USGS MOMENT TENSOR SOLUTION
Depth  54         No. of sta: 19
Moment Tensor;   Scale 10**17 Nm
  Mrr=-0.53       Mtt=-0.01
  Mpp= 0.54       Mrt= 0.74
  Mrp=-0.72       Mtp=-0.21
 Principal axes:
  T  Val=  1.16  Plg=31  Azm= 59
  N        0.03      12      321
  P       -1.19      57      212

Best Double Couple:Mo=1.2*10**17
 NP1:Strike=182 Dip=18 Slip= -47
 NP2:       318     77      -103

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