USGS/SLU Regional Moment Solution
13/01/23 02:47:39.58 Epicenter: -31.693 -71.455 MW 4.9 USGS/SLU REGIONAL MOMENT TENSOR Depth 38 No. of sta: 17 Moment Tensor; Scale 10**16 Nm Mrr= 2.30 Mtt=-0.57 Mpp=-1.73 Mrt= 0.05 Mrp=-1.81 Mtp= 0.20 Principal axes: T Val= 2.99 Plg=69 Azm= 91 N -0.55 3 354 P -2.44 21 263 Best Double Couple:Mo=2.8*10**16 NP1:Strike=349 Dip=24 Slip= 84 NP2: 176 66 93
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.