USGS Body-Wave Moment Tensor Solution
11/07/19 19:35:43.68 Epicenter: 40.133 71.435 MW 6.0 USGS MOMENT TENSOR SOLUTION Depth 19 No. of sta: 75 Moment Tensor; Scale 10**18 Nm Mrr= 0.88 Mtt=-1.27 Mpp= 0.39 Mrt=-0.58 Mrp= 0.11 Mtp=-0.03 Principal axes: T Val= 1.05 Plg=73 Azm=215 N 0.37 10 92 P -1.42 14 0 Best Double Couple:Mo=1.3*10**18 NP1:Strike=278 Dip=60 Slip= 101 NP2: 77 32 72
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.