Ash clouds are formed when a volcano erupts, releasing fine particles of ash and rock into the atmosphere. These clouds can rise high into the sky and spread over large areas, depending on the strength of the eruption and wind conditions. The ash consists of tiny fragments of volcanic glass, minerals, and other materials. When ash clouds travel, they can disrupt air travel by reducing visibility and damaging aircraft engines. They can also affect air quality and pose health risks to people and animals. Monitoring ash clouds is essential for safety, especially for regions near active volcanoes like Mount St. Helens or Kilauea.