Presentations (1-3 of 3)

1. Experimental approach to constrain phreatic eruption processes on White Island, New Zealand (IAVCEI 2013 poster presentation)

   06 Aug 2013 | Contributor(s):: Klaus Mayer, Betty Scheu, Yan Lavallee, Ben Kennedy, H. Albert Gilg, Michael Heap, Mark Letham, Cristian Montanaro, Laura Jacquemard, Noemie Pernin, Donald D. Dingwell

   White Island is New Zealand's most active volcano and primarily characterised by phreatic and phreatomagmatic eruptions. A phreatic eruption on August 2nd, 2012 ended an eleven year quiescence. More than 100 years ofintense hydrothermal activity from magmatic fluids and groundwater has created a...

2. Between cyclic eruptions (VUELCO meeting, Barcelona, 2013)

   20 Mar 2013 | Contributor(s):: Fabian Ben Wadsworth

   Volcanic unrest begins with precursory signals which are the detectable manifestation of dynamic subsurface changes. In 1997, Vulcanian eruptions from Soufrière Hills volcano (SHV), Montserrat, had a mean repose time of 9.5 hours and produced remarkably regular precursory signals. Cyclic...

3. Constraining conditions for phreatic eruptions and evaluating the influence of hydrothermal alteration on the process: an experimental approach (Vuelco mini conference Barcelona 2013)

   20 Mar 2013 | Contributor(s):: Klaus Mayer, Betty Scheu

   Phreatic eruptions are caused by rapid evaporation of hydrothermal fluids to steam with the resulting pore overpressure leading to fragmentation of overlying rocks.We investigate White Island (New Zealand) and the active volcanic sites Solfatara and Monte Nuovo in Campi Flegrei (Italy); further...