Image Collection | Hazards and Processes | Ballistic Ejecta
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Ballistic projectiles are fragments of solid (blocks) or fluid (bombs) material ejected during the range of magmatic or phreatic (steam) explosive eruptions. They are centimeters to tens of meters in diameter and follow near-parabolic trajectories separate from the main eruption column. They travel at great velocities up to hundreds of meters per second and can land up to 10 km from the vent, but typically within 5 km. They can cause significant damage to infrastructure due to the speed, size, and often high temperatures of the material.
The Communication and Risk Management of Volcanic Ballistic Hazards: https://link.springer.com/chapter/10.1007/11157_2016_35