M 6.1 - 62 km S of Hirara, Japan

Depth from broadband displacement seismograms. FAULT PLANE SOLUTION: P-Waves NP1:Strike=36 Dip=85 Slip=80 NP2:Strike=280 Dip=11 Slip=153 Principal Axes: (T) Plg=49 Azm=295 (P) Plg=39 Azm=135 Comment: The focal mechanism is poorly controlled and corresponds to reverse faulting with a small right-lateral strike-slip component. The preferred fault plane is NP2. RADIATED ENERGY No. of sta: 6 Focal mech. F Energy 8.9+3.4*10**12 Nm MOMENT TENSOR SOLUTION Dep 12 No. of sta: 11 Moment Tensor; Scale 10**18 Nm Mrr=0.30 Mtt=-0.09 Mff=-0.21 Mrt=0.87 Mrf=1.25 Mtf=-0.22 Principal axes: (T) Val=1.52 Plg=51 Azm=304 (N) Val=0.08 Plg=1 Azm=35 (P) Val=-1.60 Plg=39 Azm=126 Best Double Couple:Mo=1.6*10**18 NP1:Strike=222 Dip=6 Slip=97 NP2:Strike=35 Dip=84 Slip=89 CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 14S, 33C Centroid Location: Origin Time 19:05: 4.9 0.2 Lat 24.15N 0.03 Lon 125.02E 0.04 Dep 20.7 2.0 Half-duration 4.9 Moment Tensor; Scale 10**18 Nm Mrr=0.90 0.03 Mtt=-0.41 0.04 Mff=-0.48 0.04 Mrt=0.83 0.10 Mrf=1.21 0.14 Mtf=-0.81 0.03 Principal Axes: (T) Val=1.66 Plg=62 Azm=294 (N) Val=0.33 Plg=7 Azm=37 (P) Val=-1.99 Plg=27 Azm=131 Best Double Couple:Mo=1.8*10**18 NP1:Strike=238 Dip=19 Slip=112 NP2:Strike=35 Dip=72 Slip=83