USGS Body-Wave Moment Tensor Solution


11/04/07 13:11:24.02

Epicenter:  17.412  -94.007
MW 6.6

Depth 155         No. of sta: 29
Moment Tensor;   Scale 10**19 Nm
  Mrr=-0.46       Mtt=-0.12
  Mpp= 0.58       Mrt= 0.75
  Mrp=-0.58       Mtp=-0.30
 Principal axes:
  T  Val=  1.14  Plg=29  Azm= 58
  N       -0.04      19      317
  P       -1.10      54      197

Best Double Couple:Mo=1.1*10**19
 NP1:Strike=189 Dip=24 Slip= -35
 NP2:       312     77      -110

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 form 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