Henrys, S.A.; Bannister, S.C.; Pecher, I.A.; Davey, F.J.; Stern, T.; Stratford, W.; White, R.; Harrison, A.J.; Nishimura, Y.; Yamada, A. 2003 New Zealand North Island GeopHysical Transect (NIGHT) : field acquisition report . Lower Hutt: Institute of Geological & Nuclear Sciences. Institute of Geological & Nuclear Sciences science report 2003/19 49 p.
Abstract: This report documents the acquisition of the active-source seismic data component of a multi-disciplinary NW-SE transect carried out across the North Island during 2001, NIGHT (North Island GeopHysical Transect), to investigate the crustal structure of the central North Island and east coast. A passive-source deployment, CNIPSE, and a magnetotelluric survey complemented the NIGHT survey. NIGHT involved scientists from the Institute of Geological & Nuclear Sciences, Victoria University of Wellington, Cambridge University (UK) and Hokkaido University (Japan). NIGHT consisted of a land refraction profile, an onshore/offshore experiment, and an offshore reflection and refraction experiment. The land refraction profile involved 14 explosive shots, each 500 kg, recorded on 88 three-component (Mark Products L-22-3D 2 Hz and L-28-3D 4.5 Hz seismometers), and 200 single-component stations (L-28 vertical 4.5 Hz) deployed across central North Island and across the Taupo Volcanic Zone. For the wide-angle onshore/offshore experiment, 200 land seismometers were distributed along the transect, while the . Lower Hutt: Institute of Geological & Nuclear Sciences. M/V Geco Resolution shot 300 km of seismic lines using an airgun array with a total volume of 8200 in3. The airgun shots were also recorded with a 6000 m-long 480-channel streamer and 16 ocean bottom seismometers comprising the offshore reflection and refraction experiment. Coincident gravity and magnetic data were also collected onboard. (auth)