Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"volcanic hazard"”.
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A GIS-Based Volcanic Hazard and Risk Assessment of Eruptions Sourced within Valles Caldera, New Mexico
… in the United States due to the great amount of volcanic activity over the last 1.61 Ma. Although Valles caldera is currently dormant, there is potential for future volcanic activity, and therefore it is prudent to assess the risk to the surrounding area well before a disaster strikes. The …
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Volcano-tectonic history and volcanic hazard assessment of the 22.5-29°S segment of the Central Volcanic Zone of the Andes
Evaluating volcanic hazards typically focusses on single eruptive centres or spatially restricted areas, such as volcanic fields. Expanding hazard assessment across wide regions (e.g., large sections of a continental margin) has been rarely attempted, due to the complexity of integrating temporal …
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Examining the past to prepare for the future: Quaternary magma storage in the Main Ethiopian Rift and implications for volcanic hazard and resource potential
… been generated for several geologically-young volcanic sites across and along the MER. Quaternary eruptive products are typically bimodal. Whole-rock and glass compositions can be modelled effectively by protracted fractional crystallisation of the alkali basalt to produce pantelleritic …
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Tephra Transport, Sedimentation and Hazards
… are one of the possible outcomes of explosive volcanic eruptions and are the result of vertical settling of volcanic particles that have been expelled from the volcanic vent into the atmosphere, following magma fragmentation within the volcanic conduit. Tephra fallout represents the main …
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Geochemistry of Melt Inclusions from the Fondo Riccio and Minopoli 1 Eruptions at Campi Flegrei (Italy)
Campi Flegrei is a large volcanic complex located west of the city of Naples, Italy. The area has been the site of volcanic activity for more than 60 ka and represents a potential volcanic hazard owing to the large local population. In this study, the geochemistry of the magma associated with two …
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Numerical simulations of magma chamber dynamics at Campi Flegrei, and associated seismicity, deformation and gravity changes
… relationships between quantities measured by volcanic monitoring network and shallow magma processes is a crucial headway for the comprehension of volcanic processes and a more realistic evaluation of the associated hazard. This question is very relevant at Campi Flegrei, a volcanic quiescent …
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Exploring the use of quantitative modelling approaches to support volcanic crisis management in the Auckland Volcanic Field
… decision to call an evacuation during a volcanic crisis is complex and challenging, in part due to uncertainties related to the behaviour of the volcano. This thesis investigates the use of quantitative hazard and risk modelling approaches to support such decision-making during a volcanic …
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Improving probabilistic hazard forecasts in volcanic fields. Application to Harrat Rahat, Kingdom of Saudi Arabia
Forecasts of future volcanic activity are frequently required for volcanic fields as their relatively low eruption rates and fertile soils draw human populations to live in close proximity to these potentially hazardous regions. Harrat Rahat in the Kingdom of Saudi Arabia is one of these volcanic …
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Using Computer Visualisations to Educate and Communicate Volcanic Hazards to At-Risk Communities
… number of people living in proximity to active volcanic centres worldwide, there is a greater need to provide effective and engaging education and outreach programmes to reduce vulnerability and prepare exposed communities for potential future volcanic eruptions. The finalisation of the Sendai …
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Seismic chacterization of Vulcano island and Aeolian area by tectonic and seismo-volcanic events
We investigated the relationship between seismo-volcanic events, recorded at La Fossa crater of Vulcano (Aeolian Islands, Italy) during 2004-2009, and the dynamics of the hydrothermal system. During the period of study, six episodes of increasing numbers of seismo-volcanic events took place at the …
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Petrologic, geochemical and isotopic evolution of rhyolite lavas from the Okataina, Rotorua and Kapenga Volcanic Centres, Taupo Volcanic Zone, New Zealand
The Okataina Volcanic Centre (OVC) is a highly active modern silicic magmatic system at the northeastern end of the central Taupo Volcanic Zone, North Island, New Zealand. This study presents a set of petrographic, mineralogical, geochemical and isotopic data that focuses on the rhyolite lavas …
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Investigating Volcanic and Glacial Processes Using Microseismicity
… damage to property. Glaciers generally present a hazard over longer timescales, melting or sliding into the oceans and contributing to sea-level rise. The movement of melt at volcanoes, and ice at and near the Earth′s poles, can be investigated using microseismicity, emitted when these fluids and …