USGS/SLU Regional Moment Solution
13/02/13 00:10:13.90 Epicenter: 38.032 -118.038 MW 5.1 USGS/SLU REGIONAL MOMENT TENSOR Depth 10 No. of sta:101 Moment Tensor; Scale 10**16 Nm Mrr= 0.06 Mtt=-1.58 Mpp= 1.51 Mrt= 1.25 Mrp=-1.51 Mtp= 4.70 Principal axes: T Val= 4.96 Plg= 6 Azm=125 N 0.65 70 17 P -5.61 19 217 Best Double Couple:Mo=5.3*10**16 NP1:Strike=352 Dip=81 Slip=-162 NP2: 259 73 -9
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.