USGS Body-Wave Moment Tensor Solution
SANTA CRUZ ISLANDS
13/02/23 08:59:10.40 Epicenter: -10.639 165.335 MW 5.9 USGS MOMENT TENSOR SOLUTION Depth 12 No. of sta: 34 Moment Tensor; Scale 10**17 Nm Mrr= 5.86 Mtt= 1.55 Mpp=-7.41 Mrt=-2.74 Mrp=-1.15 Mtp=-1.91 Principal axes: T Val= 7.20 Plg=64 Azm=178 N 0.82 24 17 P -8.01 7 283 Best Double Couple:Mo=7.6*10**17 NP1:Strike=348 Dip=43 Slip= 53 NP2: 214 57 120
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.