USGS/SLU Regional Moment Solution
13/04/16 10:16:53.26 Epicenter: 35.687 -97.109 MW 4.2 USGS/SLU REGIONAL MOMENT TENSOR Depth 4 No. of sta: 35 Moment Tensor; Scale 10**15 Nm Mrr=-0.19 Mtt= 2.00 Mpp=-1.80 Mrt= 0.58 Mrp= 0.97 Mtp=-0.87 Principal axes: T Val= 2.24 Plg= 9 Azm= 10 N 0.25 63 261 P -2.50 25 104 Best Double Couple:Mo=2.4*10**15 NP1:Strike=144 Dip=65 Slip= -12 NP2: 239 79 -155
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.