USGS WPhase Moment Solution
KURIL ISLANDS
12/ 9/ 9 5:39:36.00 Epicenter: 49.268 155.730 MW 5.9 USGS/WPHASE CENTROID MOMENT TENSOR 12/ 9/ 9 5:39:36.00 Centroid: 49.268 155.883 Depth 45 No. of sta: 32 Moment Tensor; Scale 10**17 Nm Mrr= 6.84 Mtt=-1.53 Mpp=-5.32 Mrt= 1.38 Mrp= 4.35 Mtp=-3.56 Principal axes: T Val= 8.25 Plg=72 Azm=274 N = 0.48 6 27 P = -8.73 16 119 Best Double Couple:Mo=8.5*10**17 NP1:Strike=219 Dip=30 Slip= 104 NP2: 23 61 82
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.
