USGS Body-Wave Moment Tensor Solution
13/01/21 19:48:57.68 Epicenter: 30.348 57.489 MW 5.4 USGS MOMENT TENSOR SOLUTION Depth 14 No. of sta: 7 Moment Tensor; Scale 10**17 Nm Mrr=-1.91 Mtt= 0.26 Mpp= 1.65 Mrt=-0.19 Mrp= 0.43 Mtp= 0.30 Principal axes: T Val= 1.75 Plg= 6 Azm=280 N 0.23 7 190 P -1.98 81 51 Best Double Couple:Mo=1.9*10**17 NP1:Strike=184 Dip=51 Slip= -99 NP2: 18 40 -79
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.