USGS/SLU Regional Moment Solution

NEAR COAST OF ANTOFAGASTA, CHILE

12/11/20 01:09:49.28

Epicenter: -21.809  -70.265
MW 4.3

USGS/SLU REGIONAL MOMENT TENSOR
Depth  65         No. of sta: 17
Moment Tensor;   Scale 10**15 Nm
  Mrr=-0.05       Mtt=-0.07
  Mpp= 0.12       Mrt=-0.26
  Mrp=-3.43       Mtp= 0.45
 Principal axes:
  T  Val=  3.54  Plg=44  Azm=101
  N       -0.13       7        4
  P       -3.40      45      267

Best Double Couple:Mo=3.5*10**15
 NP1:Strike=267 Dip= 7 Slip=  -7
 NP2:         4     89       -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