USGS Body-Wave Moment Tensor Solution
11/08/20 18:19:23.79 Epicenter: -18.327 168.133 MW 7.0 USGS MOMENT TENSOR SOLUTION Depth 31 No. of sta: 47 Moment Tensor; Scale 10**19 Nm Mrr= 2.42 Mtt= 0.55 Mpp=-2.96 Mrt= 0.70 Mrp=-0.26 Mtp= 1.91 Principal axes: T Val= 2.68 Plg=67 Azm=347 N 1.17 22 154 P -3.85 5 246 Best Double Couple:Mo=3.4*10**19 NP1:Strike=358 Dip=45 Slip= 123 NP2: 136 54 62
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.