Results 11 to 20 of about 78,518 (194)
Phreatic eruption dynamics derived from deposit analysis: a case study from a small, phreatic eruption from Whakāri/White Island, New Zealand [PDF]
Earth, Planets and Space, 2019 On 27 April 2016, White Island erupted in a multi-pulse, phreatic event that lasted for ~ 40 min. Six, variably sized pulses generated three ballistic ejections and at least one pyroclastic surge out of the inner crater and onto the main crater floor ...
Geoff Kilgour +5 more
doaj +6 more sources
Phreatic eruptions at crater lakes: occurrence statistics and probabilistic hazard forecast [PDF]
Journal of Applied Volcanology, 2017 Phreatic eruptions, although posing a serious threat to people in crater proximity, are often underestimated and have been comparatively understudied. The detailed eruption catalogue for Ruapehu Volcano (New Zealand) provides an exceptional opportunity to study the statistics of recurring phreatic explosions at a crater lake volcano.
Karen Strehlow +5 more
openaire +9 more sources
Understanding and forecasting phreatic eruptions driven by magmatic degassing [PDF]
Earth, Planets and Space, 2018 This paper examines phreatic eruptions which are driven by inputs of magma and magmatic gas. We synthesize data from several significant phreatic systems, including two in Costa Rica (Turrialba and Poás) which are currently highly active and hazardous ...
John Stix, J. Maarten de Moor
doaj +5 more sources
Earth, Planets and Space, 2018 The 2015 unrest of the Hakone volcano in Japan, which began on April 26, generated earthquake swarms accompanied by long-term deformation. The earthquake swarm activity reached its maximum in mid-May and gradually calmed down; however, it increased again
Ryou Honda +5 more
doaj +2 more sources
Geophysical Research LettersA small phreatic eruption occurred on April 2018 Iwo‐yama, Kirishima volcanic complex, Japan. We estimated the change in the subsurface resistivity structure before and after the phreatic eruption by repeated magnetotelluric (MT) measurements.
K. Aizawa, N. Matsushima, Y. Matsunaga
doaj +2 more sources
Migration of seismic activity associated with phreatic eruption at Merapi volcano, Indonesia [PDF]
Journal of Volcanology and Geothermal Research, 2020 Abstract Phreatic activity of Merapi started after nearly 2 years of quiescence following the October–November 2010 eruption which was the largest in more than 100 years. A dozen eruptions identified by visual and/or seismic observations took place between August 2012 and April 2014.
Métaxian, Jean-Philippe +10 more
openaire +4 more sources
Anatomy of phreatic eruptions [PDF]
Earth, Planets and Space, 2018 This study investigates phreatic eruptions at two similar volcanoes, Kawah Ijen (Indonesia) and White Island (New Zealand). By carefully processing broadband seismic signals, we reveal seismic signatures and characteristics of these eruptions.
Corentin Caudron +8 more
doaj +7 more sources
Seismic precursors to the Whakaari 2019 phreatic eruption are transferable to other eruptions and volcanoes. [PDF]
Nat Commun, 2022 AbstractVolcanic eruptions that occur without warning can be deadly in touristic and populated areas. Even with real-time geophysical monitoring, forecasting sudden eruptions is difficult, because their precursors are hard to recognize and can vary between volcanoes.
Ardid A, Dempsey D, Caudron C, Cronin S.
europepmc +6 more sources
Experimental modelling of fragmentation processes within phreatic and hydrothermal eruptions [PDF]
, 2012 Phreatic and hydrothermal eruptions often occur with little or no warning representing a significant hazard within geothermal regions. These violent eruptions occur at a range of temperatures and pressures within varying rock types. A range of mechanisms including heating or decompression, allows hydrothermal/supercritical fluid to rapidly flash to ...
Foote, Lauren Charlotte
openaire +3 more sources
Earth, Planets and Space, 2018 We successfully monitored the ground deformation of an eruption center during the 2015 phreatic eruption of Hakone volcano, Japan, using ground-based interferometric synthetic aperture radar (GB-InSAR).
Senro Kuraoka +3 more
doaj +2 more sources