Volcanic Dust 2 : Dust of particles emitted by a volcano during an eruption. They may remain suspended in the atmosphere for long periods and be carried by the winds to different regions of the Earth
The Institute for Crisis, Disaster, and Risk Management (ICDRM) at the George Washington University (GWU), Emergency Management Glossary of Terms, Washington, D.C., USA 2007. http://www.gwu.edu/~icdrm/publications/PDF/GLOSSAR Y%2002-19-2007.pdf, (Emr Mgt/ Crisis, Dzstr and Rsk - Amer) {478}