USGS Body-Wave Moment Tensor Solution

SANTA CRUZ ISLANDS

13/02/01 22:18:34.89

Epicenter: -11.063  165.331
MW 6.3

USGS MOMENT TENSOR SOLUTION
Depth  23         No. of sta: 63
Moment Tensor;   Scale 10**18 Nm
  Mrr= 1.54       Mtt= 0.71
  Mpp=-2.25       Mrt= 1.40
  Mrp=-2.40       Mtp= 0.59
 Principal axes:
  T  Val=  3.15  Plg=58  Azm= 39
  N        0.57      15      155
  P       -3.72      27      253

Best Double Couple:Mo=3.5*10**18
 NP1:Strike= 16 Dip=22 Slip= 133
 NP2:       151     74        74

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