USGS WPhase Moment Solution
SANTA CRUZ ISLANDS
13/02/23 8:59: 8 Epicenter: -10.644 165.279 MW 5.9 USGS/WPHASE CENTROID MOMENT TENSOR 13/02/23 08:59: 8.00 Centroid: -10.644 165.177 Depth 19 No. of sta: 44 Moment Tensor; Scale 10**17 Nm Mrr= 7.42 Mtt= 1.64 Mpp=-9.06 Mrt=-1.91 Mrp=-2.71 Mtp=-1.05 Principal axes: T Val= 8.31 Plg=73 Azm=152 N = 1.34 13 9 P = -9.66 9 276 Best Double Couple:Mo=9.1*10**17 NP1:Strike=351 Dip=37 Slip= 67 NP2: 198 56 106
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.
