USGS Body-Wave Moment Tensor Solution

ALAMAGAN REG, N. MARIANA ISLANDS

13/01/16 02:38:23.93

Epicenter:  17.448  145.993
MW 5.3

USGS MOMENT TENSOR SOLUTION
Depth  91         No. of sta: 19
Moment Tensor;   Scale 10**17 Nm
  Mrr=-0.75       Mtt= 0.81
  Mpp=-0.06       Mrt=-0.39
  Mrp= 0.85       Mtp=-0.24
 Principal axes:
  T  Val=  1.11  Plg=22  Azm=208
  N        0.22      23      308
  P       -1.34      57       80

Best Double Couple:Mo=1.2*10**17
 NP1:Strike=137 Dip=71 Slip= -65
 NP2:       262     31      -140

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