USGS Centroid Moment Solution
NEAR COAST OF CENTRAL PERU
11/10/28 18:54:33.76 Epicenter: -14.515 -76.009 MW 6.9 USGS CENTROID MOMENT TENSOR 11/10/28 18:54:41.50 Centroid: -14.447 -76.273 Depth 32 No. of sta: 20 Moment Tensor; Scale 10**19 Nm Mrr= 1.71 Mtt=-0.45 Mpp=-1.27 Mrt= 0.39 Mrp=-2.27 Mtp= 0.77 Principal axes: T Val= 2.94 Plg=62 Azm= 91 N -0.13 10 342 P -2.81 26 247 Best Double Couple:Mo=2.9*10**19 NP1:Strike=315 Dip=21 Slip= 61 NP2: 165 72 100
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.
