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 …

The relationship between permeability and porosity is reviewed and investigated. The
classical Kozeny‐Carman approach and a fractal pore‐space geometry assumption are …

Vesicles in volcanic rocks are frozen records of degassing processes in magmas. For this
reason, their sizes, spatial arrangements, numbers and shapes can be linked to physical …

Abstract Approximately 0.4% of explosive volcanic eruptions occur within a few days of
large, distant earthquakes. This many “triggered” eruptions is much greater than expected by …

Processes involved in the development of igneous and metamorphic rocks involve some
combination of crystal growth, solution, movement and deformation, which is expressed as …

Extension fractures in volcanic systems exist on all scales, from microscopic fractures to
large fissures. They play a fundamental role in the movement of fluids and distribution of …

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

The reliable assessment of volcanic unrest must rest on an understanding of the rocks that
form the edifice. It is their microstructure that dictates their physical properties and …

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 …