USGS Body-Wave Moment Tensor Solution
OFF COAST OF AISEN, CHILE
12/11/13 04:31:27.32 Epicenter: -45.744 -77.142 MW 6.0 USGS MOMENT TENSOR SOLUTION Depth 4 No. of sta: 41 Moment Tensor; Scale 10**18 Nm Mrr= 0.05 Mtt= 0.43 Mpp=-0.48 Mrt= 0.07 Mrp= 0.35 Mtp=-0.93 Principal axes: T Val= 1.03 Plg= 8 Azm=213 N 0.13 72 329 P -1.16 16 121 Best Double Couple:Mo=1.1*10**18 NP1:Strike=166 Dip=84 Slip= -17 NP2: 258 73 -174
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.