USGS WPhase Moment Solution

NEAR COAST OF CENTRAL PERU

11/10/28 18:54:33.85

Epicenter: -14.471  -76.012
MW 6.9

USGS/WPHASE CENTROID MOMENT TENSOR
11/10/28 18:54:33.85
Centroid:  -14.171  -75.805
Depth  21         No. of sta: 52
Moment Tensor;   Scale 10**19 Nm
  Mrr= 1.56       Mtt=-0.31
  Mpp=-1.25       Mrt= 0.91
  Mrp=-2.00       Mtp= 0.56
 Principal axes:
  T  Val=  2.71  Plg=62  Azm= 65
  N     = -0.05       0      335
  P     = -2.65      27      245

Best Double Couple:Mo=2.7*10**19
 NP1:Strike=334 Dip=17 Slip=  89
 NP2:       155     72        90

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.