USGS Body-Wave Moment Tensor Solution

VANCOUVER ISLAND, CANADA REGION

11/09/09 19:41:34.68

Epicenter:  49.493 -126.967
MW 6.3

USGS MOMENT TENSOR SOLUTION
Depth  15         No. of sta: 60
Moment Tensor;   Scale 10**18 Nm
  Mrr=-0.07       Mtt=-0.77
  Mpp= 0.83       Mrt= 0.15
  Mrp=-1.25       Mtp= 3.48
 Principal axes:
  T  Val=  3.81  Plg=13  Azm=127
  N       -0.05      71      355
  P       -3.76      14      220

Best Double Couple:Mo=3.8*10**18
 NP1:Strike=263 Dip=71 Slip=  -1
 NP2:       354     89      -161

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