USGS WPhase Moment Solution
OFF COAST OF AISEN, CHILE
12/11/13 4:31:27 Epicenter: -45.743 -77.141 MW 6.1 USGS/WPHASE CENTROID MOMENT TENSOR 12/11/13 04:31:27.00 Centroid: -45.643 -77.571 Depth 11 No. of sta: 8 Moment Tensor; Scale 10**18 Nm Mrr= 0.11 Mtt= 0.40 Mpp=-0.51 Mrt= 0.63 Mrp=-0.41 Mtp=-1.63 Principal axes: T Val= 1.94 Plg=22 Azm= 36 N = -0.19 67 221 P = -1.75 1 127 Best Double Couple:Mo=1.9*10**18 NP1:Strike=174 Dip=73 Slip= 15 NP2: 80 76 163
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.
