USGS Body-Wave Moment Tensor Solution
NEAR COAST OF NORTHERN PERU
12/11/29 07:09:14.08 Epicenter: -6.504 -80.841 MW 5.5 USGS MOMENT TENSOR SOLUTION Depth 6 No. of sta: 67 Moment Tensor; Scale 10**17 Nm Mrr= 1.21 Mtt=-0.19 Mpp=-1.01 Mrt= 0.55 Mrp=-2.11 Mtp= 0.48 Principal axes: T Val= 2.50 Plg=59 Azm= 80 N 0.00 4 343 P -2.50 30 250 Best Double Couple:Mo=2.5*10**17 NP1:Strike=326 Dip=15 Slip= 73 NP2: 164 75 95
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.