Geomaterials (ie rock, sand, soil and concrete) are increasingly being encountered and
used in extreme environments, in terms of the pressure magnitude and the loading rate …

The scientific investigation of magma fragmentation and the development of experiments to
constrain and quantify its mechanisms, dynamics, efficiency and products was ushered in …

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 …

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 …

In sedimentary basins and volcanic edifices, granular materials undergo densification that
results in a decrease of porosity and permeability. Understanding the link between porosity …

Tuffisites are veins of variably sintered, pyroclastic particles that form in conduits and lava
domes as a result of localized fragmentation events during gas-and-ash explosions. Those …

Solfatara crater is located within the Campi Flegrei caldera to the west of Naples (Italy). It is
one of the largest fumarolic manifestations known, and the rocks hosting the hydrothermal …

Magmatic fragmentation during explosive eruptions consumes a significant amount of
energy by the creation of new surface via fracturing. This process reduces the energy that …

Vigorous hydrothermal activity interspersed by sequences of phreatic and phreatomagmatic
eruptions occur at Whakaari (White Island volcano), New Zealand. Here, we investigate the …

The porosity of pyroclasts is a valuable indicator of the character of a volcanic eruption.
Here, we analyse the porosity distribution of deposits of 17 different volcanic eruptions …