Correlating tephras and cryptotephras using glass compositional analyses and numerical and statistical methods: review and evaluation

DJ Lowe, NJG Pearce, MA Jorgensen… - Quaternary Science …, 2017‏ - Elsevier
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 …

Ash generation and distribution from the April-May 2010 eruption of Eyjafjallajökull, Iceland

MT Gudmundsson, T Thordarson, Á Höskuldsson… - Scientific reports, 2012‏ - nature.com
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 …

How volcanoes work: A 25 year perspective

KV Cashman, RSJ Sparks - Bulletin, 2013‏ - pubs.geoscienceworld.org
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 …

High-precision ultra-distal Holocene tephrochronology in North America

SDF Pyne-O'Donnell, PDM Hughes, DG Froese… - Quaternary Science …, 2012‏ - Elsevier
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 …

[HTML][HTML] Optimising shape analysis to quantify volcanic ash morphology

EJ Liu, KV Cashman, AC Rust - GeoResJ, 2015‏ - Elsevier
Accurate measurements of volcanic ash morphology are critical to improving both our
understanding of fragmentation processes and our ability to predict particle behaviour. In …

Interaction between volcanic plumes and wind during the 2010 Eyjafjallajökull eruption, Iceland

MJ Woodhouse, AJ Hogg, JC Phillips… - … Research: Solid Earth, 2013‏ - Wiley Online Library
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 …

A new one‐equation model of fluid drag for irregularly shaped particles valid over a wide range of Reynolds number

F Dioguardi, D Mele, P Dellino - Journal of Geophysical …, 2018‏ - Wiley Online Library
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 new shape dependent drag correlation formula for non-spherical rough particles. Experiments and results

F Dioguardi, D Mele - Powder Technology, 2015‏ - Elsevier
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 …

Magmatic versus phreatomagmatic fragmentation: Absence of evidence is not evidence of absence

JDL White, GA Valentine - Geosphere, 2016‏ - pubs.geoscienceworld.org
Fragmentation processes in eruptions are commonly contrasted as phreatomagmatic or
magmatic; the latter requires only fragmentation of magma without external intervention, but …

Reference data set of volcanic ash physicochemical and optical properties

A Vogel, S Diplas, AJ Durant, AS Azar… - Journal of …, 2017‏ - Wiley Online Library
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 …