Phenomena and Processes

Volcanic Eruptions

The ash, dust, gases, and lava released by volcanic explosion. The gases are volatile matter composed principally of about 90% water vapor, and carbon dioxide, sulfur dioxide, hydrogen, carbon monoxide, and nitrogen. The ash or dust is pyroclastic ejecta and lava is molten extrusive material consisting mainly of magnesium silicate. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

The ash, dust, gases, and lava released by volcanic explosion. The gases are volatile matter composed principally of about 90% water vapor, and carbon dioxide, sulfur dioxide, hydrogen, carbon monoxide, and nitrogen. The ash or dust is pyroclastic ejecta and lava is molten extrusive material consisting mainly of magnesium silicate. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)

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Synonyms

7 entry terms
  • Volcanic Eruption
  • Eruption, Volcanic
  • Eruptions, Volcanic
  • Volcanic Ash
  • Volcanic Gases
  • Ash, Volcanic
  • Gases, Volcanic

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Aspects Covered

8 allowable subheadings

Indexed with the subheadings adverse effects, analysis, classification, economics, ethics, history, legislation & jurisprudence, statistics & numerical data.

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Indexing Annotation

specify geographic term if pertinent

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History Note

2009 (1995); use NATURAL DISASTERS 1982-1994

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Previous Indexing

  • Air Pollutants, Environmental (1982-1994)
  • Geology (1966-1979)
  • Natural Disasters (1982-1994)

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References

  1. National Library of Medicine. Volcanic Eruptions. Medical Subject Headings (MeSH). 2026. Unique ID D018707. http://id.nlm.nih.gov/mesh/2026/D018707
  2. Volcanic Eruptions. In: Wikipedia. https://en.wikipedia.org/wiki/Volcanic_eruption
  3. Volcanic Eruptions. In: Wikidata. https://www.wikidata.org/wiki/Q7692360