USGS/SLU Regional Moment Solution
11/08/23 17:51:04.59 Epicenter: 37.936 -77.933 MW 5.7 USGS/SLU REGIONAL MOMENT TENSOR Depth 6 No. of sta: 25 Moment Tensor; Scale 10**17 Nm Mrr= 4.20 Mtt=-0.15 Mpp=-4.05 Mrt= 1.52 Mrp= 0.96 Mtp=-0.79 Principal axes: T Val= 4.73 Plg=73 Azm=344 N -0.35 15 196 P -4.39 9 104 Best Double Couple:Mo=4.6*10**17 NP1:Strike=177 Dip=39 Slip= 66 NP2: 26 55 108
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.