M 6.3 - 197 km E of Saipan, Northern Mariana Islands

Depth from broadband displacement seismograms. FAULT PLANE SOLUTION: P-Waves NP1:Strike=60 Dip=85 Slip=-90 NP2:Strike=240 Dip=5 Slip=-90 Principal Axes: (T) Plg=40 Azm=150 (P) Plg=50 Azm=330 Comment: The focal mechanism is poorly controlled and corresponds to normal faulting. The preferred fault plane is not determined. RADIATED ENERGY No. of sta: 6 Focal mech. M Energy 1.1+0.4*10**14 Nm MOMENT TENSOR SOLUTION Dep 15 No. of sta: 14 Moment Tensor; Scale 10**18 Nm Mrr=-0.49 Mtt=-2.12 Mff=2.61 Mrt=-1.31 Mrf=0.16 Mtf=2.31 Principal axes: (T) Val=3.58 Plg=5 Azm=113 (N) Val=0.01 Plg=67 Azm=215 (P) Val=-3.59 Plg=23 Azm=21 Best Double Couple:Mo=3.6*10**18 NP1:Strike=159 Dip=70 Slip=-167 NP2:Strike=65 Dip=78 Slip=-20 CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 15S, 39C M.W.: 10S, 22C Centroid Location: Origin Time 14:57:28.5 0.2 Lat 15.11N 0.02 Lon 147.82E 0.02 Dep 15.0 FIX Half-duration 4.5 Moment Tensor; Scale 10**18 Nm Mrr=-1.82 0.03 Mtt=0.34 0.03 Mff=1.48 0.03 Mrt=-0.93 0.11 Mrf=1.36 0.12 Mtf=0.49 0.03 Principal Axes: (T) Val=1.98 Plg=18 Azm=276 (N) Val=0.69 Plg=20 Azm=180 (P) Val=-2.67 Plg=62 Azm=45 Best Double Couple:Mo=2.3*10**18 NP1:Strike=35 Dip=32 Slip=-50 NP2:Strike=170 Dip=66 Slip=-112