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 Earth's history is punctuated by large explosive eruptions that eject large quantities of
magma and silicate rock fragments into the atmosphere. These tephra particles can …

Experimental investigations in a recirculating wind tunnel of the mechanisms of formation of
accretionary lapilli have demonstrated that growth is controlled by collision of liquid-coated …

By the year 2000, the number of people at risk from volcanic hazards is likely to increase to
around half a billion. Since 1980, significant advances have been made in volcano …

It has been 10 years since the ash cloud from the eruption of Eyjafjallajökull caused
unprecedented disruption to air traffic across Europe. During this event, the London Volcanic …

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 …

The phreatic eruption at Ontake volcano on 27 September 2014, which caused the worst
volcanic disaster in the past half-century in Japan, was reconstructed based on observations …

Although ashfall from particulate volcanic plumes is known to be highly electrically charged,
little is known about the charging mechanism. We describe experiments designed to …

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 …

Volcanic eruptions are events that rapidly and suddenly disperse gases and fine particles
into the atmosphere, a process most conveniently studied from the synoptic satellite …