USGS/SLU Regional Moment Solution
11/11/08 02:46:57.04 Epicenter: 35.535 -96.779 MW 4.8 USGS/SLU REGIONAL MOMENT TENSOR Depth 6 No. of sta: 57 Moment Tensor; Scale 10**16 Nm Mrr=-0.25 Mtt= 0.39 Mpp=-0.13 Mrt= 0.15 Mrp= 0.50 Mtp= 2.01 Principal axes: T Val= 2.23 Plg=10 Azm=318 N -0.29 76 181 P -1.95 9 50 Best Double Couple:Mo=2.1*10**16 NP1:Strike= 94 Dip=76 Slip= 1 NP2: 4 89 166
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.