USGS Body-Wave Moment Tensor Solution
NEAR COAST OF CENTRAL PERU
11/10/28 18:54:33.52 Epicenter: -14.479 -76.046 MW 6.8 USGS MOMENT TENSOR SOLUTION Depth 22 No. of sta: 47 Moment Tensor; Scale 10**19 Nm Mrr= 1.03 Mtt=-0.35 Mpp=-0.68 Mrt= 0.45 Mrp=-1.49 Mtp= 0.72 Principal axes: T Val= 1.90 Plg=60 Azm= 89 N 0.09 13 335 P -1.99 27 239 Best Double Couple:Mo=1.9*10**19 NP1:Strike=301 Dip=22 Slip= 53 NP2: 160 73 103
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.