USGS/SLU Regional Moment Solution

ANTOFAGASTA, CHILE

12/10/12 21:26:34.42

Epicenter: -23.675  -67.936
MW 4.6

USGS/SLU REGIONAL MOMENT TENSOR
Depth 115         No. of sta: 14
Moment Tensor;   Scale 10**15 Nm
  Mrr=-5.06       Mtt=-2.59
  Mpp= 7.65       Mrt= 3.34
  Mrp=-5.35       Mtp=-0.21
 Principal axes:
  T  Val=  9.76  Plg=21  Azm= 83
  N       -1.16      23      343
  P       -8.60      58      211

Best Double Couple:Mo=9.2*10**15
 NP1:Strike=208 Dip=32 Slip= -41
 NP2:       334     70      -115

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