USGS Body-Wave Moment Tensor Solution

SANTA CRUZ ISLANDS

13/02/08 04:26:16.50

Epicenter: -11.043  165.822
MW 5.5

USGS MOMENT TENSOR SOLUTION
Depth  14         No. of sta: 23
Moment Tensor;   Scale 10**17 Nm
  Mrr= 0.09       Mtt= 0.99
  Mpp=-1.08       Mrt=-0.43
  Mrp=-0.12       Mtp=-2.35
 Principal axes:
  T  Val=  2.56  Plg= 7  Azm=213
  N        0.09      80       79
  P       -2.65       7      304

Best Double Couple:Mo=2.6*10**17
 NP1:Strike= 78 Dip=90 Slip=-170
 NP2:       348     80        -0

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