USGS/SLU Regional Moment Solution

OFFSHORE VALPARAISO, CHILE

13/03/18 19:15:02.92

Epicenter: -32.475  -71.892
MW 4.6

USGS/SLU REGIONAL MOMENT TENSOR
Depth  27         No. of sta: 18
Moment Tensor;   Scale 10**16 Nm
  Mrr= 0.87       Mtt=-0.06
  Mpp=-0.81       Mrt=-0.09
  Mrp=-0.75       Mtp= 0.10
 Principal axes:
  T  Val=  1.17  Plg=68  Azm=105
  N       -0.07       6      359
  P       -1.10      21      267

Best Double Couple:Mo=1.1*10**16
 NP1:Strike=346 Dip=25 Slip=  75
 NP2:       182     66        97

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