USGS Centroid Moment Solution
REVILLA GIGEDO ISLANDS REGION
11/11/01 12:32:00.45 Epicenter: 19.891 -109.215 MW 6.3 USGS CENTROID MOMENT TENSOR 11/11/01 12:32:22.40 Centroid: 20.427 -109.201 Depth 29 No. of sta: 50 Moment Tensor; Scale 10**18 Nm Mrr=-0.13 Mtt=-2.54 Mpp= 2.67 Mrt=-0.53 Mrp=-0.14 Mtp=-1.52 Principal axes: T Val= 3.08 Plg= 0 Azm=255 N -0.03 79 165 P -3.06 11 345 Best Double Couple:Mo=3.1*10**18 NP1:Strike= 29 Dip=82 Slip= -8 NP2: 120 83 -172
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.
