USGS Centroid Moment Solution
OFF EAST COAST OF HONSHU, JAPAN
11/07/10 00:57:12.63 Epicenter: 38.045 143.289 MW 7.0 USGS CENTROID MOMENT TENSOR 11/07/10 00:57:24.29 Centroid: 37.999 143.447 Depth 10 No. of sta: 101 Moment Tensor; Scale 10**19 Nm Mrr= 0.01 Mtt=-2.58 Mpp= 2.57 Mrt=-0.82 Mrp= 1.85 Mtp= 1.88 Principal axes: T Val= 3.82 Plg=23 Azm=283 N -0.09 58 152 P -3.73 22 23 Best Double Couple:Mo=3.8*10**19 NP1:Strike= 64 Dip=58 Slip= 1 NP2: 333 89 148
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.
