USGS/SLU Regional Moment Solution
12/10/31 02:57:42.54 Epicenter: 62.045 -146.576 MW 4.0 USGS/SLU REGIONAL MOMENT TENSOR Depth 48 No. of sta: 50 Moment Tensor; Scale 10**15 Nm Mrr= 0.36 Mtt=-1.20 Mpp= 0.84 Mrt= 0.07 Mrp=-0.51 Mtp= 0.77 Principal axes: T Val= 1.32 Plg=26 Azm=106 N 0.16 63 304 P -1.48 7 200 Best Double Couple:Mo=1.4*10**15 NP1:Strike=151 Dip=77 Slip= 156 NP2: 246 67 14
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.