USGS WPhase Moment Solution
REVILLA GIGEDO ISLANDS REGION
11/11/ 1 12:32:0.00 Epicenter: 19.888 -109.173 MW 6.3 USGS/WPHASE CENTROID MOMENT TENSOR 11/11/ 1 12:32: 0.00 Centroid: 19.888 -109.173 Depth 17 No. of sta: 61 Moment Tensor; Scale 10**18 Nm Mrr=-0.24 Mtt=-2.06 Mpp= 2.30 Mrt=-0.31 Mrp=-1.46 Mtp=-1.38 Principal axes: T Val= 3.22 Plg=21 Azm= 76 N = -0.52 61 212 P = -2.69 18 339 Best Double Couple:Mo=3.0*10**18 NP1:Strike=117 Dip=61 Slip= 178 NP2: 208 88 29
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.
