USGS Body-Wave Moment Tensor Solution
12/12/26 13:17:56.41 Epicenter: -37.285 -73.370 MW 5.2 USGS MOMENT TENSOR SOLUTION Depth 20 No. of sta: 26 Moment Tensor; Scale 10**16 Nm Mrr= 6.72 Mtt= 0.69 Mpp=-7.41 Mrt=-0.02 Mrp=-4.70 Mtp= 0.95 Principal axes: T Val= 8.15 Plg=73 Azm= 98 N 0.76 4 355 P -8.91 17 264 Best Double Couple:Mo=8.6*10**16 NP1:Strike=349 Dip=29 Slip= 82 NP2: 178 62 94
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.