USGS Body-Wave Moment Tensor Solution


13/01/05 17:42:22.39

Epicenter: -20.056   66.578
MW 5.4

Depth   6         No. of sta: 27
Moment Tensor;   Scale 10**17 Nm
  Mrr= 0.21       Mtt= 1.24
  Mpp=-1.45       Mrt=-0.08
  Mrp=-0.42       Mtp=-0.86
 Principal axes:
  T  Val=  1.50  Plg= 2  Azm= 17
  N        0.30      78      116
  P       -1.79      12      286

Best Double Couple:Mo=1.7*10**17
 NP1:Strike= 62 Dip=80 Slip=-173
 NP2:       331     83       -10

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