USGS Body-Wave Moment Tensor Solution
13/08/23 08:34:06.33 Epicenter: -22.277 -68.569 MW 5.8 USGS MOMENT TENSOR SOLUTION Depth 104 No. of sta: 39 Moment Tensor; Scale 10**17 Nm Mrr=-0.97 Mtt=-0.32 Mpp= 1.29 Mrt=-1.54 Mrp=-4.94 Mtp= 0.61 Principal axes: T Val= 5.58 Plg=38 Azm=108 N -0.52 0 17 P -5.06 52 287 Best Double Couple:Mo=5.3*10**17 NP1:Strike=201 Dip= 7 Slip= -86 NP2: 17 83 -90
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.