USGS Body-Wave Moment Tensor Solution
NORTHEASTERN SAKHA, RUSSIA
13/02/14 13:13:52.86 Epicenter: 67.582 142.564 MW 6.6 USGS MOMENT TENSOR SOLUTION Depth 12 No. of sta:164 Moment Tensor; Scale 10**18 Nm Mrr= 7.36 Mtt=-4.43 Mpp=-2.93 Mrt= 1.20 Mrp= 2.20 Mtp= 5.63 Principal axes: T Val= 8.32 Plg=69 Azm=307 N 1.05 21 132 P -9.38 2 42 Best Double Couple:Mo=8.9*10**18 NP1:Strike=331 Dip=51 Slip= 118 NP2: 111 47 60
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.