USGS WPhase Moment Solution
AEGEAN SEA
13/01/08 14:16: 9 Epicenter: 39.659 25.567 MW 5.7 USGS/WPHASE CENTROID MOMENT TENSOR 13/01/08 14:16: 9.00 Centroid: 39.559 25.567 Depth 11 No. of sta: 24 Moment Tensor; Scale 10**17 Nm Mrr= 0.23 Mtt= 3.78 Mpp=-4.01 Mrt= 1.63 Mrp= 0.57 Mtp=-2.01 Principal axes: T Val= 4.74 Plg=18 Azm= 11 N = -0.06 68 225 P = -4.68 11 105 Best Double Couple:Mo=4.7*10**17 NP1:Strike=150 Dip=69 Slip= 5 NP2: 58 85 159
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.
