USGS Body-Wave Moment Tensor Solution


12/11/10 14:57:50.00

Epicenter:  -8.880  -75.070
MW 6.0

Depth 119         No. of sta: 56
Moment Tensor;   Scale 10**18 Nm
  Mrr=-1.04       Mtt= 0.03
  Mpp= 1.01       Mrt=-0.02
  Mrp= 0.31       Mtp= 0.30
 Principal axes:
  T  Val=  1.14  Plg= 8  Azm=285
  N       -0.05       6      194
  P       -1.09      81       68

Best Double Couple:Mo=1.1*10**18
 NP1:Strike=190 Dip=53 Slip= -97
 NP2:        21     38       -81

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