USGS Body-Wave Moment Tensor Solution

REVILLA GIGEDO ISLANDS REGION

11/11/01 12:32:00.28

Epicenter:  19.859 -109.184
MW 6.1

USGS MOMENT TENSOR SOLUTION
Depth   5         No. of sta: 45
Moment Tensor;   Scale 10**18 Nm
  Mrr=-0.23       Mtt=-1.41
  Mpp= 1.64       Mrt= 0.63
  Mrp= 0.09       Mtp=-1.11
 Principal axes:
  T  Val=  2.01  Plg= 3  Azm= 71
  N       -0.02      70      333
  P       -1.99      20      163

Best Double Couple:Mo=2.0*10**18
 NP1:Strike=205 Dip=74 Slip= -12
 NP2:       299     78      -164

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