USGS WPhase Moment Solution
KURIL ISLANDS
13/ 2/28 14: 5:51.00 Epicenter: 50.934 157.339 MW 6.9 USGS/WPHASE CENTROID MOMENT TENSOR 13/ 2/28 14: 5:51.00 Centroid: 51.034 157.498 Depth 45 No. of sta:102 Moment Tensor; Scale 10**19 Nm Mrr= 1.81 Mtt=-0.56 Mpp=-1.24 Mrt= 1.15 Mrp= 1.19 Mtp=-0.80 Principal axes: T Val= 2.46 Plg=68 Azm=320 N = -0.06 5 218 P = -2.41 21 126 Best Double Couple:Mo=2.4*10**19 NP1:Strike=207 Dip=24 Slip= 78 NP2: 40 66 95
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.
