Graham Alexander Ryan

Graham Ryan has a 15 year background in geothermal geophysics and Volcanology. He has conducted and led several geothermal exploration projects all over the globe; in New Zealand, The Western United States, The Caribbean, South America and East Africa. He specialises in using electromagnetic techniques, particularly magnetotellurics, to image and interpret geothermal systems. He also has experience in active volcano monitoring at the Montserrat Volcano Observatory and in laboratory modeling of volcanic processes. As well as conducting commercial exploration he is also an active researcher and has published over 20 articles in international journals.

Experience

  • 2008–present
    Research fellow Volcanology, Geothermal Geophysics , Institute of Earth Science and Engineering, University of Auckland
  • 2003–2008
    Volcanologist, Montserrat Volcano Observatory

Education

  • 2002 
    Lancaster University, PhD, Experimental Volcanology
  • 1997 
    University of Manchester, MPhys, Physics with Technological Physics

Publications

  • 2014
    Volcano geodesy at Soufrière Hills Volcano: A review, The Eruption of Soufriere Hills Volcano, Montserrat from 2000 to 2010, edited by G. Wadge, R. Robertson and B. Voight, Geological Society of London
  • 2014
    The SEA-CALIPSO volcano imaging experiment at Montserrat: plans, campaigns at sea and on land, scientific results, and lessons learned, Geoff Wadge, Richard Robertson, Barry Voight (eds.) The Eruption of Soufriere Hills Volcano, Montserrat from 2000 to 2010, Geological Society of London
  • 2014
    Preliminary Results of Deep Geothermal Drilling and Testing on the Island of Montserrat, Stanford Geothermal workshop
  • 2013
    Montserrat geothermal system: a 3D conceptual model, Geophys. Res. Lett., 40, 1-6, doi: 10.1002/grl.50489
  • 2013
    Lognormally Distributed K/Th/U Concentrations – Evidence for GeoCritical Fracture Flow, Los Azufres Geothermal Field, MX, Proceedings of the Geothermal Resources Council
  • 2012
    Magnetotelluric imaging of upper-crustal convection plumes beneath the Taupo Volcanic Zone, Geophys Res Lett, 39, DOI:10.1029/2011GL050177
  • 2012
    THREE-DIMENSIONAL MAGNETOTELLURIC IMAGING OF THE REPOROA / WAIOTAPU GEOTHERMAL SYSTEM, NEW ZEALAND, Proceedings of the New Zealand geothermal workshop
  • 2010
    Growth of the lava dome and extrusion rates at Soufrière Hills Volcano, Montserrat, West Indies: 2005-2008, Geophys. Res. Lett., 39, DOI: 10.1029/2009GL041477
  • 2010
    Upper crustal structure of an active volcano from refraction/reflection tomography, Montserrat, Lesser Antilles, Geophysical Journal International, 180(2), 685-696
  • 2010
    An overview of lava dome evolution, dome collapse and cyclicity at Soufrière Hills Volcano, Montserrat, 2005-2007, Geophys. Res. Lett., 37(9), DOI: 10.1029/2009GL041477
  • 2010
    Long term surface deformation of Soufrière Hills Volcano, Montserrat from GPS geodesy: Inferences from simple elastic inverse models, Geophys. Res. Lett., 37, L00E13
  • 2010
    Eruption of Soufrière Hills (1995-2009) from an offshore perspective: Insights from repeated swath bathymetry surveys, Geophys. Res. Lett., 37(11), L11307, doi:10.1029/2010GL043580
  • 2010
    Upper crustal structure of an active volcano from refraction/reflection tomography, Montserrat, Lesser Antilles, Geophysical Journal International, 180(2), 685-696
  • 2009
    Clastic and core lava components of a silicic lava dome, Geology, 37(6), 551-554, DOI: 10.1130/G25747A.1
  • 2009
    Lava production at Soufrière Hills Volcano, Montserrat: 1995-2009, Geophys Res Lett, 37, doi: 10.1029/2009GL041466
  • 2009
    Modelling the lava dome extruded at Soufrière Hills Volcano, Montserrat, August 2005-May 2006. Part II: Rockfall activity and talus deformation, Journal of Volcanology and Geothermal Research, 187(1-2), 69-84
  • 2009
    Modelling the lava dome extruded at Soufrière Volcano, Montserrat, August 2005-May 2006. Part I: Dome shape and internal structure, Journal of Volcanology and Geothermal Research, 187(1-2), 53-68
  • 2008
    Dome-building eruptions: insights from analogue experiments, Fluid motions in Volcanic conduits: A Source of Seismic and Acoustic Signals, edited by S. J. Lane and J. S. Gilbert, pp. 207-237, Geological society, London
  • 2008
    Lava dome growth and mass wasting measured by a time series of ground-based radar and seismicity observations, Journal of Geophysical Research, 173, 135-147
  • 2008
    Volcanic seismicity at Montserrat, a comparison between the 2005 dome growth episode and earlier dome growth, Journal of Volcanology and Geothermal Research, 177(4): 894-902
  • 2008
    SO2 loss rates in the plume emitted by Soufrière Hills volcano, Montserrat, Journal of Volcanology and Geothermal Research, 173, 135-147
  • 2007
    Seismic characterization of pyroclastic flow activity at Soufrière Hills Volcano, Montserrat, 08 January 2007, Natural hazards and Earth System Sciences, 7 (4), 467-472
  • 2006
    Submarine pyroclastic deposits formed at the Soufrière Hills Volcano, Montserrat (1995-2003): What happens when pyroclastic flows enter the ocean?, Journal of Geophysical Research, 106(B4), 6461-6476
  • 2002
    Episodes of cyclic vulcanian explosive activity at Soufrière Hills Volcano, Montserrat, .H. Druitt and B.P. Kokelaar (eds), pp. 281-306, The eruption of the Soufrière Hills Volcano, Montserrat, from 1995 to 1999, Geological Society, London, Memoirs, 21
  • 2002
    Tephra fallout in the eruption of Soufrière Hills Volcano, Montserrat. In The eruption of the Soufrière Hills Volcano, Montserrat, from 1995 to 1999, The eruption of the Soufrière Hills Volcano, Montserrat, from 1995 to 1999, T.H. Druitt & B.P. Kokelaar (eds.), pp. 483-516, Geological Society, London, Memoirs, 21
  • 2001
    Experimental observations of pressure oscillations and flow regimes in an analogue volcanic system, Journal of Geophysical Research, 106(B4), 6461-6476