USGS WPhase Moment Solution

OAXACA, MEXICO

13/03/26 13:04:48

Epicenter:  16.254  -98.162
MW 5.5

USGS/WPHASE CENTROID MOMENT TENSOR
13/03/26 13:04:48.00
Centroid:   16.154  -98.162
Depth  17         No. of sta: 31
Moment Tensor;   Scale 10**17 Nm
  Mrr= 0.95       Mtt=-0.91
  Mpp=-0.04       Mrt= 1.81
  Mrp=-0.72       Mtp= 0.38
 Principal axes:
  T  Val=  2.14  Plg=58  Azm= 22
  N     =  0.10       0      291
  P     = -2.24      31      201

Best Double Couple:Mo=2.2*10**17
 NP1:Strike=289 Dip=13 Slip=  88
 NP2:       111     76        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.