USGS/SLU Regional Moment Solution

NORTHERN SUMATRA, INDONESIA

13/01/21 22:22:54.00

Epicenter:   4.961   96.083
MW 6.1

USGS/SLU REGIONAL MOMENT TENSOR
Depth  12         No. of sta: 15
Moment Tensor;   Scale 10**18 Nm
  Mrr=-0.01       Mtt=-1.43
  Mpp= 1.44       Mrt= 0.12
  Mrp= 0.66       Mtp= 0.02
 Principal axes:
  T  Val=  1.70  Plg=21  Azm=271
  N       -0.25      68       77
  P       -1.44       5      179

Best Double Couple:Mo=1.6*10**18
 NP1:Strike= 47 Dip=79 Slip=  19
 NP2:       313     72       168

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