USGS WPhase Moment Solution
NEAR COAST OF CENTRAL PERU
11/10/28 18:54:33.85 Epicenter: -14.471 -76.012 MW 6.9 USGS/WPHASE CENTROID MOMENT TENSOR 11/10/28 18:54:33.85 Centroid: -14.171 -75.805 Depth 21 No. of sta: 52 Moment Tensor; Scale 10**19 Nm Mrr= 1.56 Mtt=-0.31 Mpp=-1.25 Mrt= 0.91 Mrp=-2.00 Mtp= 0.56 Principal axes: T Val= 2.71 Plg=62 Azm= 65 N = -0.05 0 335 P = -2.65 27 245 Best Double Couple:Mo=2.7*10**19 NP1:Strike=334 Dip=17 Slip= 89 NP2: 155 72 90
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.
