USGS Centroid Moment Solution

OFFSHORE GUATEMALA

12/11/11 22:15:00.60

Epicenter:  14.156  -92.188
MW 6.4

USGS CENTROID MOMENT TENSOR
12/11/11 22:15:25.29
Centroid:  14.198  -92.299
Depth  21         No. of sta: 76
Moment Tensor;   Scale 10**18 Nm
  Mrr= 3.76       Mtt=-3.23
  Mpp=-0.53       Mrt= 3.79
  Mrp=-2.43       Mtp= 1.20
 Principal axes:
  T  Val=  5.92  Plg=64  Azm= 39
  N       -0.16       6      298
  P       -5.76      25      205

Best Double Couple:Mo=5.8*10**18
 NP1:Strike=120 Dip=70 Slip=  96
 NP2:       283     21        74

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