USGS Body-Wave Moment Tensor Solution
13/08/21 12:38:30.51 Epicenter: 16.917 -99.381 MW 6.2 USGS MOMENT TENSOR SOLUTION Depth 21 No. of sta: 71 Moment Tensor; Scale 10**18 Nm Mrr= 1.48 Mtt=-0.70 Mpp=-0.78 Mrt= 1.14 Mrp=-0.81 Mtp= 1.16 Principal axes: T Val= 2.00 Plg=69 Azm= 22 N 0.39 7 131 P -2.40 20 224 Best Double Couple:Mo=2.2*10**18 NP1:Strike=327 Dip=26 Slip= 107 NP2: 128 65 82
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.