One of the biggest challenges in volcanic hazard assessment is to understand how and why
eruptive style changes within the same eruptive period or even from one eruption to the next …

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

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 …

Pore connectivity is a measure of the fraction of pore space (vesicles, voids or cracks) in a
material that is interconnected on the system length scale. Pore connectivity is …

The 1995–present eruption of Soufrière Hills Volcano on Montserrat has produced over a
cubic kilometre of andesitic magma, creating a series of lava domes that were successively …

Bubble nucleation is at the heart of magma ascent and degassing. Nucleation kinetics
control how easily a magma exsolves its volatiles, and thereby its explosivity close to the …

The eruption style of silicic magmas is affected by the loss of gas (outgassing) during ascent.
We investigate outgassing using a numerical model for one-dimensional, two-phase, steady …

Erupting magma often contains crystals over a wide range of sizes and shapes, potentially
affecting magma viscosity over many orders of magnitude. A robust relation between …

A long-standing conceptual model for deep submarine eruptions is that high hydrostatic
pressure hinders degassing and acceleration, and suppresses magma fragmentation. The …

We have coupled three independent methods to investigate the time evolution of eruptive
intensity during the sub-Plinian and Plinian phases of the 3600-year BP Late Bronze-Age …