USGS Body-Wave Moment Tensor Solution

SANTA CRUZ ISLANDS

13/02/01 05:36:40.93

Epicenter: -11.090  165.538
MW 5.9

USGS MOMENT TENSOR SOLUTION
Depth  10         No. of sta: 55
Moment Tensor;   Scale 10**17 Nm
  Mrr= 3.92       Mtt= 0.13
  Mpp=-4.05       Mrt= 5.09
  Mrp=-7.07       Mtp= 1.11
 Principal axes:
  T  Val=  9.71  Plg=56  Azm= 45
  N       -0.13       9      148
  P       -9.59      32      244

Best Double Couple:Mo=9.7*10**17
 NP1:Strike=  4 Dip=15 Slip= 127
 NP2:       147     78        81

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