USGS Body-Wave Moment Tensor Solution
OFFSHORE MAULE, CHILE
12/12/27 00:37:10.50 Epicenter: -35.779 -73.393 MW 5.7 USGS MOMENT TENSOR SOLUTION Depth 18 No. of sta: 41 Moment Tensor; Scale 10**17 Nm Mrr= 2.65 Mtt= 0.85 Mpp=-3.49 Mrt=-0.71 Mrp=-2.80 Mtp= 0.26 Principal axes: T Val= 3.92 Plg=65 Azm=124 N 0.66 13 5 P -4.58 21 270 Best Double Couple:Mo=4.3*10**17 NP1:Strike=338 Dip=26 Slip= 60 NP2: 191 67 104
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.