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

Moment Tensor Solution
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.

Moment Tensor Solution

Details on the W-phase inversion algorithm.