USGS Body-Wave Moment Tensor Solution

OFF COAST OF WASHINGTON

12/08/19 08:07:36.00

Epicenter:  47.774 -128.588
MW 5.5

USGS MOMENT TENSOR SOLUTION
Depth   6         No. of sta: 42
Moment Tensor;   Scale 10**17 Nm
  Mrr= 0.27       Mtt=-2.32
  Mpp= 2.05       Mrt=-0.62
  Mrp= 0.29       Mtp=-0.70
 Principal axes:
  T  Val=  2.24  Plg=11  Azm=260
  N        0.31      74      126
  P       -2.55      11      352

Best Double Couple:Mo=2.4*10**17
 NP1:Strike= 36 Dip=74 Slip=   0
 NP2:       306     90       164

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