USGS WPhase Moment Solution
12/09/30 16:31:31 Epicenter: 2.000 -76.600 MW 7.2 USGS/WPHASE CENTROID MOMENT TENSOR 12/09/30 16:31:31.00 Centroid: 2.100 -76.299 Depth 150 No. of sta: 19 Moment Tensor; Scale 10**19 Nm Mrr=-7.37 Mtt= 6.40 Mpp= 0.97 Mrt=-3.23 Mrp= 1.46 Mtp= 3.60 Principal axes: T Val= 8.53 Plg= 8 Azm=156 N = 0.10 18 248 P = -8.63 69 42 Best Double Couple:Mo=8.6*10**19 NP1:Strike=225 Dip=40 Slip=-119 NP2: 82 56 -67
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.
