USGS Body-Wave Moment Tensor Solution
SANTIAGO DEL ESTERO, ARGENTINA
13/02/22 12:01:59.23 Epicenter: -27.993 -63.195 MW 6.2 USGS MOMENT TENSOR SOLUTION Depth 587 No. of sta: 57 Moment Tensor; Scale 10**18 Nm Mrr=-1.30 Mtt=-0.32 Mpp= 1.62 Mrt=-1.07 Mrp= 1.71 Mtp=-0.60 Principal axes: T Val= 2.74 Plg=26 Azm=249 N -0.38 12 153 P -2.37 61 41 Best Double Couple:Mo=2.6*10**18 NP1:Strike=150 Dip=72 Slip=-102 NP2: 5 22 -57
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.