M 6.4 - 33 km SSE of Shizunai-furukawach?, Japan

Felt (IV JMA) at Hiroo, Obihiro and Urakawa and (III JMA) at Kushiro, Otaru and Tomakomai. Also felt (III JMA) at Aomori and Hachinohe, Honshu. Felt in many parts of southern Hokkaido and northern Honshu. Two events about 1.6 seconds apart. Depth from broadband displacement seismograms, based on second event. FAULT PLANE SOLUTION: P-Waves NP1:Strike=23 Dip=75 Slip=90 NP2:Strike=203 Dip=15 Slip=90 Principal Axes: (T) Plg=60 Azm=293 (P) Plg=30 Azm=113 Comment: The focal mechanism is poorly controlled and corresponds to reverse faulting. The preferred fault plane is NP2. RADIATED ENERGY No. of sta: 13 Focal mech. M Energy 3.9+0.7*10**13 Nm MOMENT TENSOR SOLUTION Dep 48 No. of sta: 15 Moment Tensor; Scale 10**18 Nm Mrr=2.03 Mtt=-1.33 Mff=-0.70 Mrt=1.24 Mrf=3.86 Mtf=-1.87 Principal axes: (T) Val=4.76 Plg=55 Azm=269 (N) Val=0.10 Plg=19 Azm=27 (P) Val=-4.86 Plg=29 Azm=128 Best Double Couple:Mo=4.8*10**18 NP1:Strike=259 Dip=23 Slip=144 NP2:Strike=22 Dip=76 Slip=71 CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 23S, 67C M.W.: 16S, 27C Centroid Location: Origin Time 19:40:52.8 0.2 Lat 42.02N 0.02 Lon 142.86E 0.02 Dep 46.3 BDY Half-duration 6.4 Moment Tensor; Scale 10**18 Nm Mrr=2.37 0.05 Mtt=-0.52 0.04 Mff=-1.85 0.04 Mrt=1.73 0.08 Mrf=3.51 0.11 Mtf=-1.19 0.04 Principal Axes: (T) Val=4.53 Plg=61 Azm=294 (N) Val=0.16 Plg=2 Azm=27 (P) Val=-4.70 Plg=29 Azm=119 Best Double Couple:Mo=4.6*10**18 NP1:Strike=215 Dip=16 Slip=98 NP2:Strike=27 Dip=74 Slip=88