USGS Centroid Moment Solution
VALPARAISO, CHILE
12/04/17 03:50:16.64 Epicenter: -32.672 -71.517 MW 6.7 USGS CENTROID MOMENT TENSOR 12/04/17 03:50:39.90 Centroid: -33.299 -71.535 Depth 43 No. of sta: 41 Moment Tensor; Scale 10**19 Nm Mrr= 1.18 Mtt=-0.08 Mpp=-1.10 Mrt= 0.26 Mrp=-1.06 Mtp= 0.05 Principal axes: T Val= 1.63 Plg=68 Azm= 70 N -0.09 5 172 P -1.53 22 264 Best Double Couple:Mo=1.6*10**19 NP1:Strike= 4 Dip=24 Slip= 103 NP2: 170 67 85
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.
