Environment ❯ Natural Disasters ❯ Volcanic Activity

Ash Clouds

Impact on Air Travel Impact on Surroundings Impact on Agriculture Impact on Air Quality Health Hazards Public Safety Impact on Transportation Air Safety Impact on Communities Health Impacts Impact on Aviation Effects on Air Travel Impact on Travel Effects on Local Communities

Mount St. Helens Plumes Are Wind-Blown 1980 Ash, Not a New Eruption

USGS confirms background activity, warning that lofted ash poses aviation and health hazards.