USGS Body-Wave Moment Tensor Solution

SOUTH SANDWICH ISLANDS REGION

13/07/15 14:03:43.04

Epicenter: -60.868  -25.144
MW 7.1

USGS MOMENT TENSOR SOLUTION
Depth  39         No. of sta: 17
Moment Tensor;   Scale 10**19 Nm
  Mrr=-1.81       Mtt= 2.40
  Mpp=-0.60       Mrt=-0.38
  Mrp=-0.92       Mtp= 4.69
 Principal axes:
  T  Val=  5.92  Plg= 6  Azm=144
  N       -1.78      76       28
  P       -4.14      13      235

Best Double Couple:Mo=5.3*10**19
 NP1:Strike=279 Dip=76 Slip=  -5
 NP2:        10     85      -166

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