MedlinePlus: Volcanoes

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Volcanoes

A volcano is a vent in the Earth's crust. Hot rock, steam, poisonous gases and ash reach the Earth’s surface when a volcano erupts. An eruption can also cause earthquakes, mudflows and flash floods, rock falls and landslides, acid rain, fires, and even tsunamis.

Volcanic gas and ash can damage the lungs of small infants, older adults, and people with severe respiratory illnesses. Volcanic ash can affect people hundreds of miles away from the eruption.

Although there are no guarantees of safety during a volcanic eruption, you can take actions to protect yourself. You should have a disaster plan. Being prepared can help reduce fear, anxiety and losses.

Federal Emergency Management Agency

Basics	Learn More	Multimedia & Cool Tools
Overviews	Related Issues	No links available
Research	Reference Shelf	For You
Journal Articles	Dictionaries/Glossaries Organizations	Children

Overviews
- Volcano(Federal Emergency Management Agency)
- Volcanoes(Centers for Disease Control and Prevention)
- What Are Volcano Hazards?(U.S. Geological Survey)
  Also available in Spanish
Related Issues
- About U.S. Volcanoes(U.S. Geological Survey)
- Volcanic Ash: What it Can Do and How to Prevent Damage(U.S. Geological Survey)
- Volcanos Can Impact Air Quality(Environmental Protection Agency)
Journal Articles
References and abstracts from MEDLINE/PubMed (National Library of Medicine)
Dictionaries/Glossaries
- USGS Photo Glossary of Volcanic Terms(U.S. Geological Survey)
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Organizations
- Federal Emergency Management Agency
  Also available in Spanish
- Volcano Hazards Program(U.S. Geological Survey)
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Children
- Volcanoes(Federal Emergency Management Agency)
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