USGS Body-Wave Moment Tensor Solution
NEAR COAST OF CENTRAL PERU
12/01/30 05:11:00.61 Epicenter: -14.179 -75.644 MW 6.3 USGS MOMENT TENSOR SOLUTION Depth 41 No. of sta: 49 Moment Tensor; Scale 10**18 Nm Mrr= 3.40 Mtt=-0.37 Mpp=-3.03 Mrt= 0.08 Mrp=-2.18 Mtp=-0.14 Principal axes: T Val= 4.07 Plg=73 Azm= 85 N -0.37 2 181 P -3.70 17 272 Best Double Couple:Mo=3.9*10**18 NP1:Strike= 5 Dip=28 Slip= 94 NP2: 180 62 88
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.