Magma fragmentation is the breakup of a continuous volume of molten rock into discrete
pieces, called pyroclasts. Because magma contains bubbles of compressible magmatic …

Fractal-geometry techniques are widely applied to the quantification of complex rock
structures. Important properties of such structures are (i) different scaling behaviour on …

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 …

Accurate measurements of volcanic ash morphology are critical to improving both our
understanding of fragmentation processes and our ability to predict particle behaviour. In …

We synthesize field and experimental data to evaluate relationships between the textures
and sizes of pyroclasts and the processes that shape them, with emphasis on the role of …

Abstract The Total Grain-Size Distribution (TGSD) of tephra deposits is crucial for hazard
assessment and provides fundamental insights into eruption dynamics. It controls both the …

Volcanic eruptions differ enormously in their size and impacts, ranging from quiet lava flow
effusions along the volcano flanks to colossal events with the potential to affect our entire …

The May 2008 eruption of Chaitén volcano, Chile, provided a rare opportunity to measure
the long-range transport of volcanic emissions and characteristics of a widely-dispersed …

A new fluid-dynamic model is developed to numerically simulate the non-equilibrium
dynamics of polydisperse gas–particle mixtures forming volcanic plumes. Starting from the …

The morphometry of volcanic ash produced by explosive eruptions yields ample information
on fragmentation processes (eg magmatic vs magma–water interactions), and on transport …