USGS Body-Wave Moment Tensor Solution
OFF COAST OF AISEN, CHILE
13/01/23 07:43:02.78 Epicenter: -44.520 -79.000 MW 5.4 USGS MOMENT TENSOR SOLUTION Depth 4 No. of sta: 23 Moment Tensor; Scale 10**17 Nm Mrr=-0.31 Mtt= 0.62 Mpp=-0.32 Mrt= 0.37 Mrp= 0.81 Mtp=-1.20 Principal axes: T Val= 1.46 Plg= 6 Azm=216 N 0.24 57 316 P -1.69 32 122 Best Double Couple:Mo=1.6*10**17 NP1:Strike=165 Dip=72 Slip= -28 NP2: 264 63 -160
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.