USGS/SLU Regional Moment Solution

ANTOFAGASTA, CHILE

12/09/07 02:37:01.75

Epicenter: -22.365  -68.279
MW 5.0

USGS/SLU REGIONAL MOMENT TENSOR
Depth  99         No. of sta: 12
Moment Tensor;   Scale 10**16 Nm
  Mrr=-2.61       Mtt= 0.88
  Mpp= 1.74       Mrt= 0.54
  Mrp=-1.78       Mtp=-1.82
 Principal axes:
  T  Val=  3.66  Plg=16  Azm= 54
  N       -0.41      13      148
  P       -3.25      70      275

Best Double Couple:Mo=3.5*10**16
 NP1:Strike=126 Dip=31 Slip=-115
 NP2:       335     62       -76

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