USGS Centroid Moment Solution


12/10/08 06:26:22.28

Epicenter:  25.125 -109.698
MW 6.0

12/10/08 06:26:44.79
Centroid:  25.556 -109.883
Depth  31         No. of sta: 16
Moment Tensor;   Scale 10**18 Nm
  Mrr= 0.09       Mtt=-1.20
  Mpp= 1.11       Mrt= 0.61
  Mrp=-0.31       Mtp=-0.34
 Principal axes:
  T  Val=  1.30  Plg=20  Azm= 77
  N        0.16      61      307
  P       -1.46      20      175

Best Double Couple:Mo=1.4*10**18
 NP1:Strike=216 Dip=61 Slip=  -0
 NP2:       306     90      -151

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