USGS Body-Wave Moment Tensor Solution
MAUG ISLANDS REG, N. MARIANA IS.
13/09/18 16:48:56.36 Epicenter: 19.161 145.610 MW 5.5 USGS MOMENT TENSOR SOLUTION Depth 119 No. of sta: 31 Moment Tensor; Scale 10**17 Nm Mrr=-0.27 Mtt= 1.10 Mpp=-0.83 Mrt=-1.37 Mrp= 1.03 Mtp= 0.00 Principal axes: T Val= 2.06 Plg=34 Azm=194 N -0.17 28 305 P -1.90 43 65 Best Double Couple:Mo=2.0*10**17 NP1:Strike=128 Dip=85 Slip= -62 NP2: 227 29 -170
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.