USGS Body-Wave Moment Tensor Solution
SANTA CRUZ ISLANDS
13/02/25 15:14:35.26 Epicenter: -11.161 165.844 MW 5.3 USGS MOMENT TENSOR SOLUTION Depth 19 No. of sta: 31 Moment Tensor; Scale 10**17 Nm Mrr= 0.61 Mtt=-0.01 Mpp=-0.60 Mrt= 0.07 Mrp=-0.80 Mtp= 0.03 Principal axes: T Val= 1.01 Plg=64 Azm= 84 N -0.01 1 176 P -1.00 26 266 Best Double Couple:Mo=1.0*10**17 NP1:Strike=358 Dip=19 Slip= 93 NP2: 175 71 89
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.