USGS WPhase Moment Solution
GULF OF CALIFORNIA
13/01/13 16:28:26 Epicenter: 25.915 -110.157 MW 5.7 USGS/WPHASE CENTROID MOMENT TENSOR 13/01/13 16:28:26.00 Centroid: 25.915 -110.157 Depth 11 No. of sta: 21 Moment Tensor; Scale 10**17 Nm Mrr=-0.09 Mtt=-3.69 Mpp= 3.79 Mrt= 0.37 Mrp=-0.66 Mtp=-0.67 Principal axes: T Val= 3.97 Plg= 9 Azm= 84 N = -0.18 79 291 P = -3.78 4 175 Best Double Couple:Mo=3.9*10**17 NP1:Strike=220 Dip=80 Slip= 3 NP2: 130 87 170
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.
