USGS Centroid Moment Solution

REVILLA GIGEDO ISLANDS REGION

11/11/01 12:32:00.45

Epicenter:  19.891 -109.215
MW 6.3

USGS CENTROID MOMENT TENSOR
11/11/01 12:32:22.40
Centroid:  20.427 -109.201
Depth  29         No. of sta: 50
Moment Tensor;   Scale 10**18 Nm
  Mrr=-0.13       Mtt=-2.54
  Mpp= 2.67       Mrt=-0.53
  Mrp=-0.14       Mtp=-1.52
 Principal axes:
  T  Val=  3.08  Plg= 0  Azm=255
  N       -0.03      79      165
  P       -3.06      11      345

Best Double Couple:Mo=3.1*10**18
 NP1:Strike= 29 Dip=82 Slip=  -8
 NP2:       120     83      -172

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