USGS Body-Wave Moment Tensor Solution

VALPARAISO, CHILE

12/04/17 03:50:17.58

Epicenter: -32.664  -71.483
MW 6.6

USGS MOMENT TENSOR SOLUTION
Depth  40         No. of sta: 101
Moment Tensor;   Scale 10**18 Nm
  Mrr= 5.94       Mtt= 0.29
  Mpp=-6.23       Mrt= 2.23
  Mrp=-6.82       Mtp=-0.77
 Principal axes:
  T  Val=  9.59  Plg=62  Azm= 58
  N       -0.30      12      173
  P       -9.29      24      269

Best Double Couple:Mo=9.4*10**18
 NP1:Strike= 23 Dip=23 Slip= 123
 NP2:       168     70        77

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