USGS Body-Wave Moment Tensor Solution

SANTA CRUZ ISLANDS

13/02/10 18:39:35.76

Epicenter: -10.980  165.447
MW 5.9

USGS MOMENT TENSOR SOLUTION
Depth  22         No. of sta: 32
Moment Tensor;   Scale 10**17 Nm
  Mrr= 0.34       Mtt= 6.46
  Mpp=-6.80       Mrt=-4.23
  Mrp=-1.53       Mtp=-1.99
 Principal axes:
  T  Val=  8.70  Plg=26  Azm=185
  N       -0.96      58       42
  P       -7.74      17      283

Best Double Couple:Mo=8.3*10**17
 NP1:Strike=326 Dip=59 Slip=   7
 NP2:       232     84       149

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