USGS WPhase Moment Solution
SOLOMON ISLANDS
12/ 2/14 8:19:58.00 Epicenter: -10.387 161.262 MW 6.4 USGS/WPHASE CENTROID MOMENT TENSOR 12/ 2/14 8:19:58.00 Centroid: -10.287 161.160 Depth 60 No. of sta: 37 Moment Tensor; Scale 10**18 Nm Mrr= 2.03 Mtt=-1.68 Mpp=-0.35 Mrt=-2.81 Mrp=-0.94 Mtp= 2.58 Principal axes: T Val= 4.49 Plg=48 Azm=140 N = -0.29 36 286 P = -4.20 17 30 Best Double Couple:Mo=4.4*10**18 NP1:Strike=161 Dip=42 Slip= 152 NP2: 273 71 51
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.
