USGS Centroid Moment Solution
OFF EAST COAST OF HONSHU, JAPAN
12/03/14 09:08:36.32 Epicenter: 40.920 144.912 MW 7.0 USGS CENTROID MOMENT TENSOR 12/03/14 09:08:51.40 Centroid: 40.807 144.496 Depth 20 No. of sta: 139 Moment Tensor; Scale 10**19 Nm Mrr=-4.27 Mtt= 3.45 Mpp= 0.82 Mrt=-2.40 Mrp= 1.18 Mtp= 0.02 Principal axes: T Val= 4.17 Plg=17 Azm=186 N 1.00 9 278 P -5.17 71 35 Best Double Couple:Mo=4.7*10**19 NP1:Strike=103 Dip=62 Slip= -80 NP2: 262 29 -108
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.
