USGS Body-Wave Moment Tensor Solution


12/09/20 21:03:42.75

Epicenter: -20.765 -178.442
MW 5.7

Depth 566         No. of sta: 30
Moment Tensor;   Scale 10**17 Nm
  Mrr=-2.38       Mtt= 1.57
  Mpp= 0.80       Mrt=-4.12
  Mrp= 1.03       Mtp=-1.54
 Principal axes:
  T  Val=  4.99  Plg=29  Azm=208
  N       -0.02      12      111
  P       -4.97      58        1

Best Double Couple:Mo=5.0*10**17
 NP1:Strike=108 Dip=75 Slip=-102
 NP2:       329     19       -51

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