USGS/SLU Regional Moment Solution
12/10/26 22:31:17.80 Epicenter: 38.282 46.750 MW 4.5 USGS/SLU REGIONAL MOMENT TENSOR Depth 9 No. of sta: 10 Moment Tensor; Scale 10**15 Nm Mrr= 0.68 Mtt=-1.90 Mpp= 1.22 Mrt=-1.13 Mrp= 2.74 Mtp=-5.56 Principal axes: T Val= 6.79 Plg=25 Azm=234 N -0.58 64 37 P -6.21 7 141 Best Double Couple:Mo=6.5*10**15 NP1:Strike= 10 Dip=78 Slip= 23 NP2: 275 67 166
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.