USGS WPhase Moment Solution
COQUIMBO, CHILE
12/11/14 19: 2:5.00 Epicenter: -29.156 -71.271 MW 6.1 USGS/WPHASE CENTROID MOMENT TENSOR 12/11/14 19: 2: 5.00 Centroid: -29.056 -71.042 Depth 60 No. of sta: 33 Moment Tensor; Scale 10**18 Nm Mrr=-0.95 Mtt= 0.23 Mpp= 0.72 Mrt= 0.08 Mrp=-1.76 Mtp= 0.15 Principal axes: T Val= 1.84 Plg=32 Azm= 93 N = 0.23 4 0 P = -2.07 57 263 Best Double Couple:Mo=2.0*10**18 NP1:Strike=201 Dip=14 Slip= -69 NP2: 360 77 -94
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.
