USGS/SLU Regional Moment Solution
13/08/29 11:20:18.68 Epicenter: 39.081 -115.502 MW 3.3 USGS/SLU REGIONAL MOMENT TENSOR Depth 11 No. of sta: 24 Moment Tensor; Scale 10**14 Nm Mrr=-0.69 Mtt=-0.11 Mpp= 0.80 Mrt= 0.55 Mrp=-0.42 Mtp= 0.67 Principal axes: T Val= 1.16 Plg= 4 Azm=116 N 0.11 40 23 P -1.27 50 211 Best Double Couple:Mo=1.2*10**14 NP1:Strike=355 Dip=61 Slip=-137 NP2: 240 54 -37
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.