USGS Body-Wave Moment Tensor Solution


12/11/11 22:15:00.60

Epicenter:  14.156  -92.188
MW 6.2

Depth  20         No. of sta: 65
Moment Tensor;   Scale 10**18 Nm
  Mrr= 1.48       Mtt=-1.28
  Mpp=-0.20       Mrt= 1.58
  Mrp=-0.55       Mtp= 0.23
 Principal axes:
  T  Val=  2.26  Plg=65  Azm= 23
  N       -0.16       3      286
  P       -2.10      25      195

Best Double Couple:Mo=2.2*10**18
 NP1:Strike=277 Dip=20 Slip=  81
 NP2:       107     70        93

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