Airborne studies of the emissions from the volcanic eruptions of Mount St. Helens

Journal Article · Thu Jan 01 00:00:00 EST 1981 · Science (Washington, D.C.); (United States)

DOI:https://doi.org/10.1126/science.211.4484.816· OSTI ID:5822625

Hobbs, P V; Radke, L F; Eltgroth, M W; Hegg, D A

The concentrations of particles less than 10 micrometers in diameter in the ash emissions from Mount St. Helens have been more than 1000 times greater than those in the ambient air. Mass loadings of particles less than 2 micrometers in diameter were generally several hundred micrograms per cubic meter. In the ash clouds, produced by the large eruption on 18 May 1980, the concentrations of several trace gases generally were low. In other emissions, significant, but variable, concentrations of sulfur gases were measured. The 18 May eruption produced nuees ardentes, lightning flashes, and volcanic hail.

• OSTI ID: 5822625
• Journal Information: Science (Washington, D.C.); (United States), Vol. 211
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
SULFUR OXIDES
ECOLOGICAL CONCENTRATION
VOLCANOES
ENVIRONMENTAL EFFECTS
AIR POLLUTION
MT ST HELENS
PARTICLE SIZE
PARTICULATES
CASCADE MOUNTAINS
CHALCOGENIDES
FEDERAL REGION X
MOUNTAINS
NORTH AMERICA
OXIDES
OXYGEN COMPOUNDS
PARTICLES
POLLUTION
SIZE
SULFUR COMPOUNDS
USA
WASHINGTON
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)