M 6.5 - 118 km ENE of Hihifo, Tonga

Felt at Pago Pago, American Samoa. Depth from broadband displacement seismograms. FAULT PLANE SOLUTION: P-Waves NP1:Strike=140 Dip=60 Slip=-90 NP2:Strike=320 Dip=30 Slip=-90 Principal Axes: (T) Plg=15 Azm=230 (P) Plg=75 Azm=50 Comment: The focal mechanism is poorly controlled and corresponds to normal faulting. The preferred fault plane is NP1. RADIATED ENERGY No. of sta: 14 Focal mech. F Energy 1.0+0.2*10**14 Nm CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 15S, 39C M.W.: 11S, 22C Centroid Location: Origin Time 05:32:30.5 0.2 Lat 15.45S 0.02 Lon 173.17W 0.02 Dep 59.8 1.0 Half-duration 7.1 Moment Tensor; Scale 10**18 Nm Mrr=-4.92 0.10 Mtt=4.30 0.10 Mff=0.63 0.10 Mrt=-0.56 0.12 Mrf=3.99 0.13 Mtf=-2.63 0.10 Principal Axes: (T) Val=6.24 Plg=14 Azm=214 (N) Val=0.82 Plg=25 Azm=311 (P) Val=-7.06 Plg=61 Azm=98 Best Double Couple:Mo=6.7*10**18 NP1:Strike=274 Dip=38 Slip=-133 NP2:Strike=144 Dip=63 Slip=-62