USGS Body-Wave Moment Tensor Solution

VALPARAISO, CHILE

12/10/11 17:22:11.53

Epicenter: -32.927  -70.477
MW 5.6

USGS MOMENT TENSOR SOLUTION
Depth  91         No. of sta: 14
Moment Tensor;   Scale 10**17 Nm
  Mrr= 0.04       Mtt=-0.52
  Mpp= 0.48       Mrt=-1.12
  Mrp= 0.54       Mtp= 3.20
 Principal axes:
  T  Val=  3.25  Plg= 6  Azm=132
  N        0.40      71      239
  P       -3.65      18       40

Best Double Couple:Mo=3.5*10**17
 NP1:Strike= 84 Dip=82 Slip= -17
 NP2:       177     73      -171

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