Results 41 to 50 of about 2,674 (211)

Vegetation dieback as a proxy for temperature within a wet pyroclastic density current: A novel experiment and observations from the 6th of August 2012 Tongariro eruption [PDF]

open access: yes, 2014
The 6th of August 2012 eruption of Te Maari (Mt Tongariro, New Zealand) generated wet pyroclastic density currents (PDCs) which caused widespread dieback of vegetation (singed, brown foliage) in their path.
Bylsma, Rebecca Johanna   +5 more
core   +2 more sources

Analysis of the intermittent volcanic tremor observed at Mt. Etna, Sicily during March-May 1987

open access: yesAnnals of Geophysics, 1996
Volcanic activity at the summit craters of Mt. Etna includes phreatic eruptions which jeopardize tourists and other people who sporadically approach the top of the volcano. To date no appreciable precursors of this kind of activity are known.
A. Leotta   +3 more
doaj   +1 more source

Volcanic Unrest and Pre-eruptive Processes: A Hazard and Risk Perspective [PDF]

open access: yes, 2017
Volcanic unrest is complex and capable of producing multiple hazards that can be triggered by a number of different subsurface processes. Scientific interpretations of unrest data aim to better understand (i) the processes behind unrest and their ...
Barclay, Jennifer   +2 more
core   +3 more sources

Fluid circulation pattern inside La Soufrière volcano (Guadeloupe) inferred from combined electrical resistivity tomography, self-potential, soil temperature and diffuse degassing measurements [PDF]

open access: yes, 2014
International audienceAfter a drastic decline in 1983, hydrothermal activity at La Soufrière lava dome (Guadeloupe, Lesser Antilles) has been progressively increasing in the summit area since 1992, raising the threat of a renewed eruptive activity.
Borgogno, G.   +9 more
core   +5 more sources

Landslide Character and Hydrological Thresholds for Slope Failure Initiation on Volcanic Scoria Slopes: Case Study From Mt Hobson/Ōhinerau, Auckland, New Zealand

open access: yesNew Zealand Journal of Geology and Geophysics, Volume 69, Issue 1, March 2026.
Rainfall‐induced landslides involving on Auckland Volcanic Field scoria cones are highly unusual, compared with widespread landsliding in the surrounding Auckland clay‐rich residual soils. Indeed, while Auckland can suffer from thousands of rainfall‐induced shallow landslides from severe storms at subdecadal timescales, these are usually limited to ...
Beatrice Bertelli, Martin Brook
wiley   +1 more source

The 1723 AD violent Strombolian and phreatomagatic eruption at Irazu volcano (Costa Rica) [PDF]

open access: yes, 2013
The largest of the recorded historic eruptions at Irazú volcano began on February 16, 1723 and lasted until at least December 11. We here critically examine deposits of this eruption exposed on the summit of Irazú. Our reconstruction of the eruption is
Alvarado, G. E., Schmincke, Hans-Ulrich
core  

Corrigendum. Maars to calderas: end-members on a spectrum of explosive volcanic depressions [PDF]

open access: yes, 2017
A corrigendum on Maars to calderas: end-members on a spectrum of explosive volcanic depressions by Palladino, D. M., Valentine, G. A., Sottili, G., and Taddeucci, J. (2015). Front. Earth Sci. 3:36. doi: 10.3389/feart.2015.00036 Reason for Corrigendum:
Palladino, D. M.   +3 more
core   +1 more source

Seismo‐Acoustic Evidence for Meteoric Water Modulation of Hydrothermal Fluid Discharge

open access: yesJournal of Geophysical Research: Solid Earth, Volume 131, Issue 3, March 2026.
Abstract Deciphering the signal of external processes on active hydrothermal dynamics represents a critical challenge in understanding volcanic unrest. At the Pisciarelli hydrothermal site, located within the densely populated Campi Flegrei caldera (Italy), we investigate the role of meteoric water influx in modulating shallow hydrothermal fluid ...
Rebecca Sveva Morelli   +23 more
wiley   +1 more source

Contention between supply of hydrothermal fluid and conduit obstruction: inferences from numerical simulations

open access: yesEarth, Planets and Space, 2018
We investigate a volcanic hydrothermal system using numerical simulations, focusing on change in crater temperature. Both increases and decreases in crater temperature have been observed before phreatic eruptions.
Ryo Tanaka   +3 more
doaj   +1 more source

Seismic Precursors to the Whakaari 2019 Phreatic Eruption detected in Five Other Volcanoes [PDF]

open access: yes, 2021
Abstract Volcanic 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. Here, we describe a general seismic precursor signal for gas-driven eruptions,
Alberto Ardid   +3 more
openaire   +1 more source

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