USGS/SLU Regional Moment Solution
13/02/26 17:07:34.91 Epicenter: 19.153 -67.910 MW 4.9 USGS/SLU REGIONAL MOMENT TENSOR Depth 27 No. of sta: 40 Moment Tensor; Scale 10**16 Nm Mrr= 0.84 Mtt=-0.05 Mpp=-0.79 Mrt=-0.82 Mrp= 2.53 Mtp= 1.48 Principal axes: T Val= 2.70 Plg=52 Azm=279 N 0.76 20 161 P -3.47 31 59 Best Double Couple:Mo=3.2*10**16 NP1:Strike=103 Dip=23 Slip= 30 NP2: 345 79 110
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.