USGS Centroid Moment Solution


11/12/11 01:47:25.81

Epicenter:  18.037  -99.769
MW 6.5

11/12/11 01:47:47.40
Centroid:  18.266  -99.535
Depth  53         No. of sta: 123
Moment Tensor;   Scale 10**18 Nm
  Mrr=-6.23       Mtt= 5.25
  Mpp= 0.98       Mrt=-2.18
  Mrp=-0.05       Mtp=-1.16
 Principal axes:
  T  Val=  5.91  Plg=10  Azm=193
  N        0.73       4      102
  P       -6.64      79      349

Best Double Couple:Mo=6.3*10**18
 NP1:Strike= 99 Dip=55 Slip= -95
 NP2:       288     35       -83

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