USGS Body-Wave Moment Tensor Solution
SANTA CRUZ ISLANDS
13/02/23 14:31:05.69 Epicenter: -11.720 165.039 MW 5.6 USGS MOMENT TENSOR SOLUTION Depth 6 No. of sta: 29 Moment Tensor; Scale 10**17 Nm Mrr=-3.18 Mtt= 0.64 Mpp= 2.53 Mrt=-0.79 Mrp= 1.25 Mtp=-0.78 Principal axes: T Val= 3.14 Plg=13 Azm=249 N 0.39 4 158 P -3.53 76 50 Best Double Couple:Mo=3.4*10**17 NP1:Strike=155 Dip=58 Slip= -95 NP2: 344 32 -82
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.