USGS Centroid Moment Solution
GUERRERO, MEXICO
11/12/11 01:47:25.81 Epicenter: 18.037 -99.769 MW 6.5 USGS CENTROID MOMENT TENSOR 11/12/11 01:47:47.40 Centroid: 18.266 -99.535 Depth 53 No. of sta: 123 Moment Tensor; Scale 10**18 Nm Mrr=-6.23 Mtt= 5.25 Mpp= 0.98 Mrt=-2.18 Mrp=-0.05 Mtp=-1.16 Principal axes: T Val= 5.91 Plg=10 Azm=193 N 0.73 4 102 P -6.64 79 349 Best Double Couple:Mo=6.3*10**18 NP1:Strike= 99 Dip=55 Slip= -95 NP2: 288 35 -83
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.
