USGS/SLU Regional Moment Solution


12/12/09 01:23:06.24

Epicenter:  37.888   22.642
MW 4.0

Depth  13         No. of sta: 14
Moment Tensor;   Scale 10**15 Nm
  Mrr=-1.01       Mtt= 1.14
  Mpp=-0.13       Mrt=-0.41
  Mrp= 0.26       Mtp=-0.17
 Principal axes:
  T  Val=  1.25  Plg=11  Azm=189
  N       -0.12      11      281
  P       -1.13      74       55

Best Double Couple:Mo=1.2*10**15
 NP1:Strike=266 Dip=35 Slip=-109
 NP2:       109     57       -77

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