USGS Body-Wave Moment Tensor Solution
OFF W. COAST OF BAJA CALIFORNIA
12/12/14 10:36:02.00 Epicenter: 31.206 -119.565 MW 6.3 USGS MOMENT TENSOR SOLUTION Depth 11 No. of sta: 38 Moment Tensor; Scale 10**18 Nm Mrr=-3.54 Mtt= 0.91 Mpp= 2.62 Mrt=-0.25 Mrp=-1.03 Mtp= 0.85 Principal axes: T Val= 3.13 Plg= 9 Azm=112 N 0.57 2 21 P -3.71 81 279 Best Double Couple:Mo=3.5*10**18 NP1:Strike=204 Dip=36 Slip= -87 NP2: 20 54 -93
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.