M 7.1 - 118 km NNE of Gisborne, New Zealand

Felt over much of the North Island and as far south as Christchurch on the South Island. Also felt on the Chatham Islands. Depth from broadband displacement seismograms. FAULT PLANE SOLUTION: P-Waves NP1:Strike=210 Dip=62 Slip=-126 NP2:Strike=87 Dip=44 Slip=-42 Principal Axes: (T) Plg=10 Azm=325 (P) Plg=57 Azm=71 Comment: The focal mechanism is poorly controlled and corresponds to normal faulting with a large strike-slip component. The preferred fault plane is not determined. RADIATED ENERGY No. of sta: 9 Focal mech. F Energy 1.1+0.2*10**15 Nm MOMENT TENSOR SOLUTION Dep 15 No. of sta: 33 Moment Tensor; Scale 10**19 Nm Mrr=-2.22 Mtt=2.02 Mff=0.20 Mrt=0.86 Mrf=1.61 Mtf=1.35 Principal axes: (T) Val=3.19 Plg=16 Azm=327 (N) Val=-0.16 Plg=19 Azm=231 (P) Val=-3.03 Plg=64 Azm=95 Best Double Couple:Mo=3.1*10**19 NP1:Strike=84 Dip=33 Slip=-53 NP2:Strike=222 Dip=64 Slip=-111 CENTROID, MOMENT TENSOR (HRV) Data Used: GSN L.P.B.: 79S,219C Centroid Location: Origin Time 22:51:13.3 0.1 Lat 37.61S 0.01 Lon 179.40E 0.01 Dep 15.0 FIX Half-duration 9.0 Moment Tensor; Scale 10**19 Nm Mrr=-4.77 0.04 Mtt=1.23 0.04 Mff=3.54 0.05 Mrt=1.49 0.11 Mrf=2.15 0.12 Mtf=3.09 0.04 Principal Axes: (T) Val=6.30 Plg=13 Azm=305 (N) Val=-0.91 Plg=0 Azm=215 (P) Val=-5.39 Plg=77 Azm=124 Best Double Couple:Mo=5.8*10**19 NP1:Strike=35 Dip=32 Slip=-90 NP2:Strike=215 Dip=58 Slip=-90