USGS Centroid Moment Solution

SOUTH SANDWICH ISLANDS REGION

13/07/15 14:03:43.04

Epicenter: -60.868  -25.144
MW 7.3

USGS CENTROID MOMENT TENSOR
13/07/15 14:04:13.70
Centroid: -61.082  -23.918
Depth  36         No. of sta:147
Moment Tensor;   Scale 10**20 Nm
  Mrr=-0.30       Mtt= 0.31
  Mpp=-0.01       Mrt= 0.61
  Mrp= 0.33       Mtp= 1.16
 Principal axes:
  T  Val=  1.56  Plg=20  Azm=320
  N       -0.51      64      100
  P       -1.06      15      225

Best Double Couple:Mo=1.3*10**20
 NP1:Strike=  2 Dip=65 Slip= 176
 NP2:        93     87        25

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