USGS Body-Wave Moment Tensor Solution
12/09/24 10:31:23.48 Epicenter: -21.187 -174.211 MW 5.5 USGS MOMENT TENSOR SOLUTION Depth 10 No. of sta: 63 Moment Tensor; Scale 10**17 Nm Mrr= 1.75 Mtt=-1.80 Mpp= 0.06 Mrt= 0.42 Mrp= 0.28 Mtp=-0.45 Principal axes: T Val= 1.83 Plg=81 Azm=307 N 0.14 6 76 P -1.97 7 167 Best Double Couple:Mo=1.9*10**17 NP1:Strike= 71 Dip=53 Slip= 83 NP2: 263 38 100
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.