USGS Body-Wave Moment Tensor Solution
PAGAN REG., N. MARIANA ISLANDS
13/05/14 00:32:25.82 Epicenter: 18.760 145.288 MW 6.8 USGS MOMENT TENSOR SOLUTION Depth 605 No. of sta: 49 Moment Tensor; Scale 10**19 Nm Mrr=-1.13 Mtt=-0.58 Mpp= 1.71 Mrt=-1.52 Mrp= 0.06 Mtp=-0.94 Principal axes: T Val= 2.17 Plg=12 Azm=245 N 0.31 40 145 P -2.48 48 348 Best Double Couple:Mo=2.3*10**19 NP1:Strike= 13 Dip=48 Slip= -30 NP2: 125 68 -134
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.