USGS Body-Wave Moment Tensor Solution
12/11/22 13:07:11.07 Epicenter: -22.768 -63.632 MW 5.9 USGS MOMENT TENSOR SOLUTION Depth 546 No. of sta: 28 Moment Tensor; Scale 10**18 Nm Mrr=-0.47 Mtt=-0.18 Mpp= 0.65 Mrt=-0.15 Mrp= 0.71 Mtp= 0.49 Principal axes: T Val= 1.11 Plg=22 Azm=289 N -0.12 31 185 P -0.98 51 47 Best Double Couple:Mo=1.1*10**18 NP1:Strike=174 Dip=73 Slip=-123 NP2: 60 36 -29
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.