USGS Centroid Moment Solution


12/11/10 14:57:50.00

Epicenter:  -8.880  -75.070
MW 6.0

12/11/10 14:58:05.70
Centroid:  -8.964  -74.806
Depth 105         No. of sta: 69
Moment Tensor;   Scale 10**18 Nm
  Mrr=-1.24       Mtt= 0.07
  Mpp= 1.17       Mrt= 0.03
  Mrp= 0.26       Mtp= 0.28
 Principal axes:
  T  Val=  1.26  Plg= 6  Azm=283
  N        0.01       1      193
  P       -1.27      84       91

Best Double Couple:Mo=1.3*10**18
 NP1:Strike= 15 Dip=39 Slip= -88
 NP2:       192     51       -92

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