USGS Body-Wave Moment Tensor Solution
FIJI REGION
12/12/12 01:44:24.75 Epicenter: -19.607 -176.199 MW 5.4 USGS MOMENT TENSOR SOLUTION Depth 9 No. of sta: 32 Moment Tensor; Scale 10**17 Nm Mrr= 0.25 Mtt=-1.81 Mpp= 1.55 Mrt= 0.03 Mrp= 0.16 Mtp=-0.50 Principal axes: T Val= 1.64 Plg= 6 Azm=262 N 0.24 84 69 P -1.88 1 172 Best Double Couple:Mo=1.8*10**17 NP1:Strike= 37 Dip=87 Slip= 5 NP2: 307 85 177
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.
