Dr Graham Ryan

Position:  Research Fellow

Email:      g.ryan@auckland.ac.nz

Phone:     09 373 7599 extension 88685

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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.

Selected Publications  (Google Scholar - Full Publication List)

Ryan, G.A., S.A., Peacock, J., Rugis, J., Shalev, E. (2013) Montserrat geothermal system: a 3D conceptual model, Geophys. Res. Lett., 40, 1-6, doi: 10.1002/grl.50489.

Leary, P., P. Malin, G. A. Ryan, C. Lorenzo, and M. Flores (accepted), Lognormally Distributed K/Th/U Concentrations – Evidence for GeoCritical Fracture Flow, Los Azufres Geothermal Field, MX, paper presented at GRC, Las Vegas, Nevada.
 
Odbert, H. M., G. A. Ryan, G. S. Mattioli, S. Hautmann, J. Gottsmann, N. Fournier, R. Herd, and A. Linde (2012), Volcano geodesy at Soufrière Hills Volcano: a review (in press), Geological Society, London.
 
Bertrand, E. A., T. G. Caldwell, G. J. Hill, E. L. Wallin, S. L. Bennie, N. Cozens, S. A. Onacha, G. A. Ryan, C. Walter, A. Zaino, and P. Wameyo (2012), Magnetotelluric imaging of upper-crustal convection plumes beneath the Taupo Volcanic Zone, New Zealand, Geophys Res Lett, 39, DOI:10.1029/2011GL050177.
 
Ryan, G. A., S. C. Loughlin, M. R. James, L. D. Jones, E. S. Calder, T. Christopher, M. H. Strutt, and G. Wadge (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.

Hale, A.J., Calder, E.S., Loughlin, S., Wadge, C.G., Ryan, G. A. (2009a), 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,

Loughlin, S. C., Luckett, R., Ryan, G., Christopher, T., Hards, V., De Angelis, S., Jones, L., and Strutt, M., 2010. An overview of lava dome evolution, dome collapse and cyclicity at Soufrière Hills Volcano, Montserrat, 2005-2007. Geophysical Research Letters, Vol. 37(9). doi: 10.1029/2009GL041477.

Hale, A.J., Calder, E.S., Wadge, C.G., Loughlin, S., Ryan, G. A. (2009b), 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.

Loughlin, S., Palmer, M., and Ryan, G., 2010. Eruption of Soufrière Hills (1995-2009) from an offshore perspective: Insights from repeated swath bathymetry surveys. Geophysical Research Letters, Vol. 37(11), L11307. doi: 10.1029/2010GL043580.

Le Friant, A., Deplus, C., Boudon, G., Feuillet, N., Trofimovs, J., Komorowski, J. C., Sparks, R. S. J., Talling, P., Loughlin, S., Palmer, M., and Ryan, G., 2010. Eruption of Soufrière Hills (1995-2009) from an offshore perspective: Insights from repeated swath bathymetry surveys. Geophysical Research Letters, Vol. 37(11), L11307. doi: 10.1029/2010GL043580.

Mattioli, G. S., Herd, R. A., Strutt, M. H., Ryan, G., Widiwijayanti, C., and Voight, B., 2010. Long term surface deformation of Soufrière Hills Volcano, Montserrat from GPS geodesy: Inferences from simple elastic inverse models. Geophysical Research Letters, Vol. 37, L00E13.

Paulatto, M., T. A. Minshull, B. Baptie, S. Dean, J. O. S. Hammond, T. Henstock, C. L. Kenedi, E. J. Kiddle, P. Malin, C. Peirce, G. Ryan, E. Shalev, R. S. J. Sparks, B. Voight, 2010, Upper crustal structure of an active volcano from refraction/reflection tomography, Montserrat, Lesser Antilles, Geophysical Journal International, 180, 685-696

Ryan, G. A., Loughlin, S. C., James, M. R., Jones, L. D., Calder, E. S., Christopher, T., Strutt, M. H., and Wadge, G., 2010. Growth of the lava dome and extrusion rates at Soufrière Hills Volcano, Montserrat, West Indies: 2005-2008. Geophysical Research Letters. doi: 10.1029/2009GL041477.

Ryan, G. A., S. C. Loughlin, M. R. James, L. D. Jones, E. S. Calder, T. Christopher, M. H. Strutt, and G. Wadge (in press), Growth of the lava dome and extrusion rates at Soufrière Hills Volcano, Montserrat, West Indies: 2005-2008, Geophys. Res. Lett., DOI: 10.1029/2009GL041477.
 
Wadge, G., G. Ryan, and E. S. Calder (2009), Clastic and core lava components of a silicic lava dome, Geology, 37(6), 551-554, DOI: 10.1130/G25747A.1.