USGS Centroid Moment Solution

ATACAMA, CHILE

13/01/30 20:15:42.95

Epicenter: -28.180  -70.785
MW 6.7

USGS CENTROID MOMENT TENSOR
13/01/30 20:15:57.79
Centroid: -28.329  -70.749
Depth  42         No. of sta:142
Moment Tensor;   Scale 10**19 Nm
  Mrr= 1.31       Mtt=-0.00
  Mpp=-1.30       Mrt= 0.16
  Mrp=-0.98       Mtp=-0.17
 Principal axes:
  T  Val=  1.66  Plg=70  Azm= 69
  N       -0.02       8      182
  P       -1.64      18      274

Best Double Couple:Mo=1.6*10**19
 NP1:Strike= 17 Dip=28 Slip= 107
 NP2:       178     64        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