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 …

The style and evolution of volcanic eruptions are dictated by the fluid mechanics governing
magma ascent. Decompression during ascent causes dissolved volatile species, such as …

Most volcanoes erupt both effusively and explosively, with explosive behaviour being
responsible for most human fatalities. Eruption style is thought to be strongly controlled by …

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

In the broadest sense, volcanic eruptions are either effusive or explosive. During explosive
eruptions magma fragments and eruption intensity is ultimately related to the fragmentation …

Basaltic eruptions are the most common form of volcanism on Earth and planetary bodies.
The low viscosity of basaltic magmas inhibits fragmentation, which favours effusive and lava …

In response to rapid decompression, porous magma may fragment explosively. This occurs
when the melt can no longer withstand forces exerted upon it due to the overpressure in …

Silicate melts are complicated in structure and composition. Hence, diffusion in a melt (in this
chapter, a melt includes both liquid and glass) can be very complicated due to the presence …

The vesicularity, permeability, and structure of pumice clasts provide insight into conditions
of vesiculation and fragmentation during Plinian fall and pyroclastic flow-producing phases …

Although gas exsolution is a major driving force behind explosive volcanic eruptions,
viscosity is critical in controlling the escape of bubbles and switching between explosive and …