USGS WPhase Moment Solution
OFF EAST COAST OF HONSHU, JAPAN
11/03/22 7:18:47 Epicenter: 37.249 143.956 MW 6.4 USGS/WPHASE CENTROID MOMENT TENSOR 11/03/22 07:18:47.00 Centroid: 37.049 144.156 Depth 15 No. of sta: 21 Moment Tensor; Scale 10**18 Nm Mrr=-5.43 Mtt= 2.11 Mpp= 3.32 Mrt= 2.15 Mrp=-0.95 Mtp= 2.17 Principal axes: T Val= 5.00 Plg= 3 Azm=308 N = 1.23 18 40 P = -6.23 70 209 Best Double Couple:Mo=5.7*10**18 NP1:Strike= 20 Dip=45 Slip=-117 NP2: 236 51 -65
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 form 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.
