USGS/SLU Regional Moment Solution

HAIDA GWAII, CANADA

12/10/28 19:09:55.79

Epicenter:  52.352 -131.831
MW 5.5

USGS/SLU REGIONAL MOMENT TENSOR
Depth   4         No. of sta: 21
Moment Tensor;   Scale 10**17 Nm
  Mrr=-1.76       Mtt= 1.11
  Mpp= 0.65       Mrt= 0.22
  Mrp= 0.92       Mtp=-0.87
 Principal axes:
  T  Val=  1.83  Plg= 7  Azm=221
  N        0.32      21      314
  P       -2.15      67      114

Best Double Couple:Mo=2.0*10**17
 NP1:Strike=149 Dip=55 Slip= -64
 NP2:       288     42      -123

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