USGS/SLU Regional Moment Solution

OFFSHORE VALPARAISO, CHILE

12/11/15 20:32:36.64

Epicenter: -32.657  -71.816
MW 4.5

USGS/SLU REGIONAL MOMENT TENSOR
Depth  28         No. of sta: 15
Moment Tensor;   Scale 10**15 Nm
  Mrr= 5.32       Mtt= 1.15
  Mpp=-6.47       Mrt=-0.11
  Mrp=-3.09       Mtp=-1.34
 Principal axes:
  T  Val=  6.09  Plg=76  Azm= 80
  N        1.35       5      188
  P       -7.44      14      279

Best Double Couple:Mo=6.9*10**15
 NP1:Strike=185 Dip=59 Slip=  85
 NP2:        15     32        99

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