USGS Body-Wave Moment Tensor Solution
12/10/20 23:00:32.55 Epicenter: -13.565 166.600 MW 6.2 USGS MOMENT TENSOR SOLUTION Depth 34 No. of sta: 71 Moment Tensor; Scale 10**18 Nm Mrr= 1.68 Mtt=-0.13 Mpp=-1.55 Mrt=-0.45 Mrp= 1.32 Mtp=-0.57 Principal axes: T Val= 2.31 Plg=65 Azm=234 N -0.21 18 7 P -2.10 17 102 Best Double Couple:Mo=2.2*10**18 NP1:Strike=358 Dip=65 Slip= 71 NP2: 218 32 125
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.