USGS WPhase Moment Solution
FIJI REGION
13/ 2/26 19:57:55.00 Epicenter: -21.442 -179.318 MW 5.7 USGS/WPHASE CENTROID MOMENT TENSOR 13/ 2/26 19:57:55.00 Centroid: -21.442 -179.318 Depth 630 No. of sta: 14 Moment Tensor; Scale 10**17 Nm Mrr= 0.45 Mtt=-3.34 Mpp= 2.90 Mrt=-1.36 Mrp= 0.09 Mtp= 3.67 Principal axes: T Val= 4.65 Plg= 6 Azm=115 N = 0.67 75 234 P = -5.32 12 24 Best Double Couple:Mo=5.0*10**17 NP1:Strike=160 Dip=76 Slip=-176 NP2: 69 86 -13
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.
