USGS Body-Wave Moment Tensor Solution
NEAR EAST COAST OF HONSHU, JAPAN
11/08/19 05:36:32.83 Epicenter: 37.673 141.716 MW 6.3 USGS MOMENT TENSOR SOLUTION Depth 47 No. of sta: 93 Moment Tensor; Scale 10**18 Nm Mrr= 3.58 Mtt=-0.14 Mpp=-3.43 Mrt=-0.19 Mrp=-1.38 Mtp=-0.42 Principal axes: T Val= 3.84 Plg=79 Azm= 99 N -0.09 0 7 P -3.75 11 277 Best Double Couple:Mo=3.8*10**18 NP1:Strike= 7 Dip=34 Slip= 90 NP2: 187 56 90
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.