Tephra

Tephra refers to volcanic materials that are expelled during eruptions and fall to the ground. This can include ash, pumice, and volcanic rocks. When a volcano erupts, it releases these particles into the air, and they can travel significant distances before settling on the land or water. Tephra can vary in size from fine ash to large stones, and its impact can be significant, affecting air quality, health, agriculture, and infrastructure. Understanding tephra is important for hazard assessment and preparing for volcanic events.