USGS Body-Wave Moment Tensor Solution

SANTA CRUZ ISLANDS

13/02/01 22:16:35.86

Epicenter: -10.938  165.445
MW 6.3

USGS MOMENT TENSOR SOLUTION
Depth  21         No. of sta: 71
Moment Tensor;   Scale 10**18 Nm
  Mrr= 0.99       Mtt= 0.81
  Mpp=-1.80       Mrt= 1.30
  Mrp=-2.34       Mtp= 0.76
 Principal axes:
  T  Val=  2.68  Plg=56  Azm= 40
  N        0.85      14      152
  P       -3.53      30      250

Best Double Couple:Mo=3.2*10**18
 NP1:Strike= 17 Dip=20 Slip= 137
 NP2:       148     77        76

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