USGS Body-Wave Moment Tensor Solution
SOUTH SANDWICH ISLANDS REGION
13/03/19 03:29:00.45 Epicenter: -58.929 -24.482 MW 5.9 USGS MOMENT TENSOR SOLUTION Depth 26 No. of sta: 34 Moment Tensor; Scale 10**17 Nm Mrr= 6.04 Mtt=-7.22 Mpp= 1.18 Mrt=-0.50 Mrp= 3.08 Mtp= 3.25 Principal axes: T Val= 7.60 Plg=62 Azm=279 N 0.88 27 114 P -8.49 6 20 Best Double Couple:Mo=8.1*10**17 NP1:Strike=313 Dip=57 Slip= 123 NP2: 84 46 51
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.