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Correlating tephras and cryptotephras using glass compositional analyses and numerical and statistical methods: review and evaluation
We define tephras and cryptotephras and their components (mainly ash-sized particles of
glass±crystals in distal deposits) and summarize the basis of tephrochronology as a …
glass±crystals in distal deposits) and summarize the basis of tephrochronology as a …
Ash generation and distribution from the April-May 2010 eruption of Eyjafjallajökull, Iceland
The 39-day long eruption at the summit of Eyjafjallajökull volcano in April–May 2010 was of
modest size but ash was widely dispersed. By combining data from ground surveys and …
modest size but ash was widely dispersed. By combining data from ground surveys and …
How volcanoes work: A 25 year perspective
Over the past 25 years, our understanding of the physical processes that drive volcanic
eruptions has increased enormously thanks to major advances in computational and …
eruptions has increased enormously thanks to major advances in computational and …
High-precision ultra-distal Holocene tephrochronology in North America
Far-travelled volcanic ashes (tephras) from Holocene eruptions in Alaska and the Pacific
northwest have been traced to the easternmost extent of North America, providing the basis …
northwest have been traced to the easternmost extent of North America, providing the basis …
[HTML][HTML] Optimising shape analysis to quantify volcanic ash morphology
Accurate measurements of volcanic ash morphology are critical to improving both our
understanding of fragmentation processes and our ability to predict particle behaviour. In …
understanding of fragmentation processes and our ability to predict particle behaviour. In …
Interaction between volcanic plumes and wind during the 2010 Eyjafjallajökull eruption, Iceland
Estimates of volcanic source mass flux, currently deduced from observations of plume
height, are crucial for ash dispersion models for aviation and population hazard. This study …
height, are crucial for ash dispersion models for aviation and population hazard. This study …
A new one‐equation model of fluid drag for irregularly shaped particles valid over a wide range of Reynolds number
A new drag law for irregularly shaped particles is presented here. Particles are described by
a shape factor that takes into account both sphericity and circularity, which can be measured …
a shape factor that takes into account both sphericity and circularity, which can be measured …
A new shape dependent drag correlation formula for non-spherical rough particles. Experiments and results
The drag of non-spherical rough particles has been investigated in a wide range of
Reynolds numbers (0.03–10,000). The study is based on experimental measurements of the …
Reynolds numbers (0.03–10,000). The study is based on experimental measurements of the …
Magmatic versus phreatomagmatic fragmentation: Absence of evidence is not evidence of absence
Fragmentation processes in eruptions are commonly contrasted as phreatomagmatic or
magmatic; the latter requires only fragmentation of magma without external intervention, but …
magmatic; the latter requires only fragmentation of magma without external intervention, but …
Reference data set of volcanic ash physicochemical and optical properties
Uncertainty in the physicochemical and optical properties of volcanic ash particles creates
errors in the detection and modeling of volcanic ash clouds and in quantification of their …
errors in the detection and modeling of volcanic ash clouds and in quantification of their …