USGS Body-Wave Moment Tensor Solution
NEAR EAST COAST OF HONSHU, JAPAN
11/09/16 19:26:41.50 Epicenter: 40.303 142.801 MW 6.7 USGS MOMENT TENSOR SOLUTION Depth 38 No. of sta: 124 Moment Tensor; Scale 10**19 Nm Mrr= 0.12 Mtt=-0.05 Mpp=-0.08 Mrt= 0.51 Mrp= 1.19 Mtp=-0.15 Principal axes: T Val= 1.28 Plg=48 Azm=289 N 0.06 4 23 P -1.34 41 117 Best Double Couple:Mo=1.3*10**19 NP1:Strike= 23 Dip=87 Slip= 86 NP2: 254 5 141
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.