USGS Centroid Moment Solution

OFF W. COAST OF BAJA CALIFORNIA

12/12/14 10:36:02.01

Epicenter:  31.213 -119.560
MW 6.4

USGS CENTROID MOMENT TENSOR
12/12/14 10:36:24.50
Centroid:  31.336 -119.801
Depth  26         No. of sta: 74
Moment Tensor;   Scale 10**18 Nm
  Mrr=-4.63       Mtt= 1.08
  Mpp= 3.55       Mrt=-1.21
  Mrp= 1.77       Mtp= 2.59
 Principal axes:
  T  Val=  5.26  Plg= 5  Azm=300
  N        0.22      21      208
  P       -5.49      68       43

Best Double Couple:Mo=5.4*10**18
 NP1:Strike= 52 Dip=44 Slip= -58
 NP2:       192     54      -117

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