Volcanic Avalanche 2 : A large, chaotic mass of soil, rock, and volcanic debris moving swiftly down the slopes of a volcano (also called debris avalanche)
County of Humboldt, Volcano Ash Contingency Plan to the Emergency Operations Plan, Glossary, Humboldt Operational Area, Humboldt County Sheriffs Office, Office of Emergency Services, Eureka, CA, USA 2014. http://humboldtgov.org/DocumentCenter/View/6209, (ND/ Volc Emr - Amer) {965}