USGS Body-Wave Moment Tensor Solution


13/01/13 21:23:26.76

Epicenter: -20.131  -69.174
MW 5.3

Depth  80         No. of sta: 12
Moment Tensor;   Scale 10**17 Nm
  Mrr=-0.65       Mtt= 0.17
  Mpp= 0.48       Mrt=-0.19
  Mrp=-1.09       Mtp= 0.39
 Principal axes:
  T  Val=  1.31  Plg=29  Azm=114
  N        0.01      12       17
  P       -1.32      58      267

Best Double Couple:Mo=1.3*10**17
 NP1:Strike=234 Dip=20 Slip= -51
 NP2:        14     75      -103

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