What are the pulverizied rock lava ash and other fragments ejected from the vent of a volcano called?

The pulverized rock, lava ash, and other fragments ejected from the vent of a volcano are collectively known as tephra. Tephra can vary in size from fine ash to larger volcanic rocks and is produced during explosive volcanic eruptions. It can be dispersed over large areas by wind, posing hazards to air travel and human health.