USGS/SLU Regional Moment Solution
11/02/28 05:00:50 ARKANSAS Epicenter: 35.260 -92.340 MW 4.7 USGS/SLU REGIONAL MOMENT TENSOR Depth 4 No. of sta: 24 Moment Tensor; Scale 10**15 Nm Mrr=-0.35 Mtt= 9.22 Mpp=-8.87 Mrt= 0.01 Mrp=-2.27 Mtp= 7.36 Principal axes: T Val= 11.88 Plg= 4 Azm=160 N 0.00 79 52 P -11.88 11 251 Best Double Couple:Mo=1.2*10**16 NP1:Strike= 26 Dip=85 Slip=-170 NP2: 295 80 -5
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 form 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.