Dome rock densification parameters

20 Oct 2014 | Contributor(s): Fabian Ben Wadsworth, Betty Scheu

Phreatic explosion apparatus

03 Apr 2014 | Contributor(s): Betty Scheu, Donald B. Dingwell

Description of an experimental setup to investigate phreatic eruptions in the laboratory

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...

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...

Constraining edifice stability and phreatic eruptions at White Island, New Zealand (CoV 7 2012)

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

White Island is New Zealand's most active volcano and is primarily characterised by phreatic and phreatomagmatic eruptions, interspersed by occasional strombolian events. The common occurrence of magma-water interaction at White Island derives from the presence hydrothermal system that induces...

The onset of dense plug formation during cyclic eruptions at Soufrière Hills Volcano, Montserrat (COV 7, 2012)

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

Cyclicity at active volcanoes is commonly observed and interpreted to reflect periods of vesiculation and gas pressurisation beneath more dense degassed plugs. In 1997, Vulcanian eruptions from Soufrière Hills volcano (SHV), Montserrat, had a mean repose time of 9.5 hours. We consider the...