USGS/SLU Regional Moment Solution

ANTOFAGASTA, CHILE

13/01/09 11:21:18.90

Epicenter: -24.268  -69.522
MW 4.9

USGS/SLU REGIONAL MOMENT TENSOR
Depth 103         No. of sta: 14
Moment Tensor;   Scale 10**16 Nm
  Mrr=-1.81       Mtt=-0.20
  Mpp= 2.02       Mrt=-0.79
  Mrp= 0.84       Mtp=-1.03
 Principal axes:
  T  Val=  2.68  Plg=14  Azm=247
  N       -0.50      14      153
  P       -2.18      70       19

Best Double Couple:Mo=2.5*10**16
 NP1:Strike=145 Dip=60 Slip=-106
 NP2:       355     34       -64

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