USGS/SLU Regional Moment Solution
13/04/16 06:56:30.25 Epicenter: 35.692 -97.066 MW 4.4 USGS/SLU REGIONAL MOMENT TENSOR Depth 4 No. of sta: 33 Moment Tensor; Scale 10**15 Nm Mrr=-0.98 Mtt= 4.89 Mpp=-3.91 Mrt=-1.35 Mrp= 3.10 Mtp=-1.34 Principal axes: T Val= 5.64 Plg=17 Azm=194 N 0.24 53 308 P -5.89 32 93 Best Double Couple:Mo=5.8*10**15 NP1:Strike=140 Dip=81 Slip= -36 NP2: 237 55 -168
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.