USGS Centroid Moment Solution

SANTA CRUZ ISLANDS

13/02/08 15:26:38.95

Epicenter: -10.917  165.977
MW 7.1

USGS CENTROID MOMENT TENSOR
13/02/08 15:27:06.00
Centroid: -10.451  166.136
Depth  34         No. of sta: 58
Moment Tensor;   Scale 10**19 Nm
  Mrr= 0.29       Mtt= 0.30
  Mpp=-0.59       Mrt=-0.11
  Mrp=-1.55       Mtp=-4.94
 Principal axes:
  T  Val=  5.02  Plg=12  Azm= 44
  N        0.35      73      176
  P       -5.37      12      311

Best Double Couple:Mo=5.2*10**19
 NP1:Strike= 88 Dip=73 Slip=-180
 NP2:       358     90       -17

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