USGS WPhase Moment Solution
HAIDA GWAII, CANADA
12/10/28 18:54:21 Epicenter: 52.632 -132.701 MW 6.3 USGS/WPHASE CENTROID MOMENT TENSOR 12/10/28 18:54:21.00 Centroid: 52.632 -132.701 Depth 11 No. of sta: 75 Moment Tensor; Scale 10**18 Nm Mrr=-3.55 Mtt= 1.37 Mpp= 2.18 Mrt=-0.76 Mrp= 0.72 Mtp=-1.80 Principal axes: T Val= 3.77 Plg= 8 Azm=231 N = -0.07 2 140 P = -3.70 81 35 Best Double Couple:Mo=3.7*10**18 NP1:Strike=324 Dip=37 Slip= -86 NP2: 139 53 -92
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.
