Staff profiles

Graham LeonardVolcanic Geologist

Department

Volcanology

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Biography

Graham is a Principal Scientist within the Earth Structure and Processes Department. His particular research interests are in Taupo Volcanic Zone volcanic mapping; New Zealand volcanic geology, stratigraphy and geochronology; developing effective response to warning systems, especially for volcanic, tsunami & landslide/debris-flow processes; and quantifying/characterising & mitigating the impacts of natural hazard events.

Qualifications

  • PhD, Volcanology
  • BSc, Volcanology

Areas of expertise

  • Geology: Petrology
  • Geology: Petrography
  • Geology: Volcanology
  • Geology: Hazard Assessment
  • Geochemist: Trace Element Geochemistry
  • Geology: Hazard mapping
  • Geology: GIS mapping
  • Geology: Field mapping & compilation
  • Geology: Engineering Geology
  • Geochronology: Ar-Ar
  • Social Science: Survey design
  • Social Science: Interviewing
  • Social Science: Effective Warning Response
  • Social Science: Impact Assessment
  • Social Science: Natural Hazards Research
  • Social Science: Social Media
  • Social Science: Community Consultation

Major Publications

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  • Leonard, G.S.; Cole, R.P.; Christenson, B.W.; Conway, C.E.; Cronin, S.J.; Gamble, J.A.; Hurst, A.W.; Kennedy, B.M.; Miller, C.A.; Procter, J.N.; Pure, L.R.; Townsend, D.B.; White, J.D.L.; Wilson, C.J.N. 2021. Ruapehu and Tongariro stratovolcanoes : a review of current understanding, New Zealand Journal of Geology and Geophysics 64(2/3): p. 389-420. DOI: 10.1080/00288306.2021.1909080.
  • Cole, R.P.; White, J.D.L.; Dürig, T.; Buttner, R.; ZImanowski, B.; Bowman, M.H.; Conway, C.E.; Leonard, G.S.; Pure, L.R.; Townsend, D.B. 2021. Controls on andesitic glaciovolcanism at ice-capped volcanoes from field and experimental studies, Geology 49(9): p. 1069-1073. DOI: 10.1130/G48735.1.
  • Pure, L.R.; Leonard, G.S.; Townsend, D.B.; Wilson, C.J.N.; Calvert, A.T.; Cole, R.P.; Conway, C.E.; Gamble, J.A.; Smith, T. 2020. A high-resolution 40Ar/39Ar lava chronology and edifice construction history for Tongariro volcano, New Zealand, Journal of Volcanology and Geothermal Research 403: article 106993. DOI: 10.1016/j.jvolgeores.2020.106993.
  • Wysoczanski, R.; Leonard, G.S.; Gill, J.; Wright, I.; Calvert, A.; McIntosh, W.; Jicha, B.; Gamble, J.; Timm, C.; Handler, M.; Drewes-Todd, E.; Zohrab, A. 2019. Ar-Ar age constraints on the timing of Havre Trough opening and magmatism, New Zealand Journal of Geology and Geophysics 62(3): p. 371-377. DOI: 10.1080/00288306.2019.1602059.
  • Townsend, D.B.; Leonard, G.S.; Conway, C.E.; Eaves, S.R.; Wilson, C.J.N. (compilers) 2017. Geology of the Tongariro National Park area
  • Leonard, G.S.; Calvert, A.T.; Hopkins, J.L.; Wilson, C.J.N.; Smid, E.R.; Lindsay, J.M.; Champion, D.E. 2017. High-precision 40Ar/39Ar dating of Quaternary basalts from Auckland Volcanic Field, New Zealand, with implications for eruption rates and paleomagnetic correlations, Journal of Volcanology and Geothermal Research 343: p. 60-74. DOI: 10.1016/j.jvolgeores.2017.05.033.
  • New Zealand Ministry of Civil Defence & Emergency Management 2016. Tsunami evacuation zones : Director's Guideline for Civil Defence Emergency Management Groups [DGL 08/16]
  • Conway, C.E.; Leonard, G.S.; Townsend, D.B.; Calvert, A.T.; Wilson, C.J.N.; Gamble, J.A.; Eaves, S.R. 2016. A high-resolution 40Ar/39Ar lava chronology and edifice construction history for Ruapehu volcano, New Zealand, Journal of Volcanology and Geothermal Research 327: p. 152-179. DOI: 10.1016/j.jvolgeores.2016.07.006.
  • New Zealand Ministry of Civil Defence & Emergency Management 2014. Tsunami warning sirens
  • Leonard, G.S.; Stewart, C.; Wilson, T.M.; Procter, J.N.; Scott, B.J.; Keys, H.J.; Jolly, G.E.; Wardman, J.B.; Cronin, S.J.; McBride, S.K. 2014. Integrating multidisciplinary science, modelling and impact data into evolving, syn-event volcanic hazard mapping and communication : a case study from the 2012 Tongariro eruption crisis, New Zealand, Journal of Volcanology and Geothermal Research 286: p. 208-232. DOI: 10.1016/j.jvolgeores.2014.08.018.
  • Leonard, G.S.; Johnston, D.M.; Gregg, C.E. 2013. Warning systems, Encyclopedia of natural hazards : p. 1091-1096.
  • Wilson, T.M.; Stewart, C.; Sword-Daniels, V.; Leonard, G.S.; Johnston, D.M.; Cole, J.W.; Wardman, J.B.; Wilson, G.; Barnard, S.T. 2012. Volcanic ash impacts on critical infrastructure, Physics and chemistry of the earth 45/46: p. 5-23. DOI: 10.1016/j.pce.2011.06.006.
  • Fraser, S.; Leonard, G.S.; Murakami, H.; Matsuo, I. 2012. Tsunami vertical evacuation buildings : lessons for international preparedness following the 2011 Great East Japan tsunami, Journal of Disaster Research 7(sp): p. 446-457.
  • Leonard, G.S.; Houghton, B. 2012. Volcanoes : blow up, Awesome forces : the natural hazards that threaten New Zealand : p. 16-35.
  • Leonard, G.S.; Begg, J.G.; Wilson, C.J.N. (comps) 2010. Geology of the Rotorua area : scale 1:250,000
  • New Zealand Ministry of Civil Defence & Emergency Management 2009. Public alerting : options assessment
  • Wilson, C.J.N.; Gravley, D.M.; Leonard, G.S.; Rowland, J.V. 2009. Volcanism in the central Taupo Volcanic Zone, New Zealand : tempo, styles and controls, Studies in volcanology : the legacy of George Walker : p. 225-247.
  • New Zealand Ministry of Civil Defence & Emergency Management 2008. National tsunami signage
  • Wilson, C.J.N.; Leonard, G.S. 2008. Slumbering giants, A continent on the move : New Zealand geoscience into the 21st century : p. 166-169.
  • Leonard, G.S.; Johnston, D.M.; Paton, D.; Christianson, A.; Becker, J.S.; Keys, H. 2008. Developing effective warning systems : ongoing research at Ruapehu volcano, New Zealand, Journal of Volcanology and Geothermal Research 172(3/4): p.199-215. DOI: 10.1016/j.jvolgeores.2007.12.008.
  • Leonard, G.S.; Lowe, D.J.; McSaveney, E.; Smith, R.; Stewart, C.; Wright, I. 2007. Living on the ring of fire, Life on the edge : New Zealand's natural hazards and disasters : p. 76-115.
  • Webb, T.H. 2005. Review of New Zealand's preparedness for tsunami hazard, comparison to risk and recommendations for treatment
  • Leonard, G.S.; Cole, J.W.; Nairn, I.A.; Self, S. 2002. Basalt triggering of the c. AD 1305 Kaharoa rhyolite eruption, Tarawera Volcanic Complex, New Zealand, Journal of Volcanology and Geothermal Research 115(3-4): p. 461-486.

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