USGS/SLU Regional Moment Solution
12/10/20 00:25:51.75 Epicenter: -32.208 -71.931 MW 4.3 USGS/SLU REGIONAL MOMENT TENSOR Depth 8 No. of sta: 11 Moment Tensor; Scale 10**15 Nm Mrr= 0.19 Mtt= 0.31 Mpp=-0.50 Mrt= 0.92 Mrp=-3.05 Mtp=-0.55 Principal axes: T Val= 3.28 Plg=45 Azm= 62 N -0.05 12 164 P -3.24 42 265 Best Double Couple:Mo=3.3*10**15 NP1:Strike=164 Dip=89 Slip= 78 NP2: 67 12 173
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.