USGS/SLU Regional Moment Solution
13/04/18 03:42:50.06 Epicenter: 31.726 140.288 MW 4.5 USGS/SLU REGIONAL MOMENT TENSOR Depth 53 No. of sta: 6 Moment Tensor; Scale 10**15 Nm Mrr= 4.25 Mtt=-1.68 Mpp=-2.57 Mrt=-4.68 Mrp= 2.72 Mtp= 1.32 Principal axes: T Val= 7.16 Plg=62 Azm=203 N -1.05 8 308 P -6.11 27 42 Best Double Couple:Mo=6.7*10**15 NP1:Strike=306 Dip=73 Slip= 82 NP2: 151 19 115
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.