USGS Body-Wave Moment Tensor Solution

SANTA CRUZ ISLANDS

13/02/17 19:18:52.46

Epicenter: -10.804  165.745
MW 5.5

USGS MOMENT TENSOR SOLUTION
Depth  14         No. of sta: 39
Moment Tensor;   Scale 10**17 Nm
  Mrr=-0.70       Mtt= 2.22
  Mpp=-1.52       Mrt=-0.24
  Mrp=-0.64       Mtp=-0.45
 Principal axes:
  T  Val=  2.29  Plg= 3  Azm=186
  N       -0.35      61       90
  P       -1.94      28      278

Best Double Couple:Mo=2.1*10**17
 NP1:Strike= 56 Dip=73 Slip=-157
 NP2:       318     68       -19

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