USGS Body-Wave Moment Tensor Solution

ATACAMA, CHILE

13/01/30 20:15:42.95

Epicenter: -28.180  -70.785
MW 6.8

USGS MOMENT TENSOR SOLUTION
Depth  45         No. of sta: 75
Moment Tensor;   Scale 10**19 Nm
  Mrr= 1.74       Mtt= 0.02
  Mpp=-1.77       Mrt= 0.43
  Mrp=-1.17       Mtp=-0.48
 Principal axes:
  T  Val=  2.24  Plg=67  Azm= 51
  N       -0.06      16      185
  P       -2.17      16      279

Best Double Couple:Mo=2.2*10**19
 NP1:Strike= 32 Dip=33 Slip= 121
 NP2:       176     62        72

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