USGS/SLU Regional Moment Solution
13/08/23 21:28:58.00 Epicenter: 61.569 -141.076 MW 4.4 USGS/SLU REGIONAL MOMENT TENSOR Depth 8 No. of sta: 65 Moment Tensor; Scale 10**15 Nm Mrr= 3.87 Mtt=-4.20 Mpp= 0.33 Mrt=-2.35 Mrp=-0.31 Mtp=-0.15 Principal axes: T Val= 4.53 Plg=75 Azm=166 N 0.32 3 267 P -4.85 15 357 Best Double Couple:Mo=4.7*10**15 NP1:Strike= 92 Dip=30 Slip= 96 NP2: 265 60 87
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.