Multichannel seismic data from the "Wanganui Neotechtonics - Back-arc Extension" voyage (TAN0105) by the R/V Tangaroa. The voyage was undertaken as part of the "Extensional Back-arc Processes" project of the "Active Seabed Processes" FRST programme. The objectives of the programme are to determine the contemporaneous processes of extensional faulting, subsidence andc sedimentation in the Wanganui Bight and Bay of Plenty, to compare the mechanisims of extension, potential seismicity of offshore faluts, and the influence of sealevel cycles on sediment-tectonic interactions at opposite ends of the back-arc region of the Hikurangi subduction zone. Survey Leader: Geoffroy Lamarche Organisations: NIWA Seismic Instrument: 45/105 CU.IN. GI AIRGUN, 48-channels, Uniboom Navigation Instrument: DGPS Ports: Wellington to Wellington

Multichannel seismic data from the "Bay of Plenty Neotectonics Whakatane Graben Extension" voyage (TAN9914) of the R/V Tangaroa. The voyage was undertaken as part of the "Extensional Back-arc Processes" project of the "Active Seabed Processes" FRST programme. The objectives of the programme are to determine the contemporaneous processes of extensional faulting, subsidence andc sedimentation in the Wanganui Bight and Bay of Plenty, to compare the mechanisims of extension, potential seismicity of offshore faluts, and the influence of sealevel cycles on sediment-tectonic interactions at opposite ends of the back-arc region of the Hikurangi subduction zone. Survey Leader: Geoffroy Lamrache Organisations: NIWA Seismic Instrument: 210 cu.in.,GI AIRGUN, 48 CHANNELS Navigation Instrument: GPS Ports: Wellington to Auckland

Multichannel seismic data from the "Hikurangi Fan Drift\Ruatoria Avalanche" voyage (3057) of the R/V Tangaroa. The voyage was undertaken to map the extent of the Hikurangi Fan-drift which is a "sink" for much of the sediment that is eroded from the Southern Alps and mountain ranges of central New Zealand. It gets there via the meandering Hikurani Channel which is over 2,000km long. Additional, the voyage attempted to map the extent of the Ruatoria Avalanche. This avalanche, involving an area larger than the Coromandel Peninsula, has collapsed 2-3km (vertically) down the continental slope and travelled up to 100km out across the plain at its base. Survey Leader: Keith Lewis Organisations: NIWA Seismic Instrument: 45/105 CU.IN. GI AIRGUN, 48-channels Navigation Instrument: Furuno GP50 GPS Ports: Wellington to Wellington