USGS WPhase Moment Solution
NEAR EAST COAST OF HONSHU, JAPAN
12/10/25 10:32:27.00 Epicenter: 38.305 141.732 MW 5.6 USGS/WPHASE CENTROID MOMENT TENSOR 12/10/25 10:32:27.00 Centroid: 38.405 141.860 Depth 50 No. of sta: 16 Moment Tensor; Scale 10**17 Nm Mrr= 2.58 Mtt=-0.75 Mpp=-1.83 Mrt= 0.79 Mrp= 2.09 Mtp=-0.97 Principal axes: T Val= 3.44 Plg=68 Azm=284 N = -0.20 4 26 P = -3.24 20 117 Best Double Couple:Mo=3.3*10**17 NP1:Strike=216 Dip=24 Slip= 101 NP2: 24 66 85
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.
