USGS Body-Wave Moment Tensor Solution
12/10/18 01:27:19.11 Epicenter: -54.369 144.059 MW 5.9 USGS MOMENT TENSOR SOLUTION Depth 13 No. of sta: 25 Moment Tensor; Scale 10**17 Nm Mrr=-1.01 Mtt= 3.67 Mpp=-2.66 Mrt= 0.26 Mrp=-2.83 Mtp=-8.48 Principal axes: T Val= 9.87 Plg=10 Azm= 36 N -0.73 72 157 P -9.15 15 303 Best Double Couple:Mo=9.5*10**17 NP1:Strike= 80 Dip=72 Slip=-176 NP2: 349 86 -18
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.