Most volcanic ash particles with diameters< 63μm settle from eruption clouds as particle
aggregates that cumulatively have larger sizes, lower densities, and higher terminal fall …

The electrification of volcanic ash plumes and the occurrence of volcanic lightning are now
known to be common phenomena during explosive volcanic eruptions. This knowledge …

Tephra transport models try to predict atmospheric dispersion and sedimentation of tephra
depending on meteorology, particle properties, and eruption characteristics, defined by …

Volcanic lightning, perhaps the most spectacular consequence of the electrification of
volcanic plumes, has been implicated in the origin of life on Earth, and may also exist in …

Lightning and electrification at volcanoes are important because they represent a hazard in
their own right, they are a component of the global electrical circuit, and because they …

Aggregation of airborne particles is an important way in which the atmosphere is cleansed of
fine dust particles, such as following explosive eruptions and meteorite impacts. We identify …

We develop a model to describe ash aggregates in a volcanic plume. The model is based
on a solution of the classical Smoluchowski equation, obtained by introducing a similarity …

Uncertainty remains on the origin of distal mass deposition maxima observed in many recent
tephra fall deposits. In this study the link between ash aggregation and the formation of distal …

The aggregation of volcanic ash particles within the eruption column of explosive eruptions
has been observed at many volcanoes. It influences the residence time of ash in the …

During explosive eruptions, airborne particles collide and stick together, accelerating the
fallout of volcanic ash and climate-forcing aerosols. This aggregation process remains a …