Blick, G.H.; Otway, P.M. 1995 Regional vertical deformation from repeated precise levelling in the Taupo Volcanic Zone . Lower Hutt: Institute of Geological & Nuclear Sciences Institute of Geological & Nuclear Sciences science report 95/23 9 p.
Abstract: The Taupo Volcanic Zone is an area of active rifting that lies near the southern end of the Tonga-Kermadec-Hikurangi subduction zone. Repeated surveys of precise levelling networks in the 1970s and 1980s in the Central North Island - Bay of Plenty region allow the study of vertical deformation in this area. Results show a broad area of subsidence along the Taupo Volcanic Zone at rates up to 10mm/yr with the area of greatest subsidence coinciding with the Taupo Fault Belt. The area of greatest relative subsidence is north of Lake Taupo centred along the Taupo Fault Belt with a possible second area of relative subsidence south of Lake Taupo centred on the Tongariro Volcanic Centre. Artificially induced subsidence at a rate of up to 33mm/yr due to steam extraction from the Wairakei Geothermal Field has also been recorded. (auth)