USGS Body-Wave Moment Tensor Solution

SANTA CRUZ ISLANDS

13/02/28 18:07:48.28

Epicenter: -10.922  165.963
MW 5.8

USGS MOMENT TENSOR SOLUTION
Depth  37         No. of sta: 28
Moment Tensor;   Scale 10**17 Nm
  Mrr= 7.82       Mtt=-2.32
  Mpp=-5.50       Mrt=-1.19
  Mrp= 0.18       Mtp= 1.03
 Principal axes:
  T  Val=  7.96  Plg=83  Azm=182
  N       -2.13       6      343
  P       -5.83       2       73

Best Double Couple:Mo=7.1*10**17
 NP1:Strike=169 Dip=43 Slip=  99
 NP2:       337     48        82

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