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Site Index

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Volcano Hazards

  Location of volcano hazards

Types of volcano hazards
Gas (definition, illustrations)

Landslides (definition, illustrations)
Landslide generated by Mount St. Helens
Volcano-landslide deposits in world

Lahars (definition, illustrations)
How lahars are generated
Lahar terms

Lava Flows (definition, illustrations)
Lava flows cover Kalapana, Hawaii

Pyroclastic Flows (definition, illustrations)
How pyroclastic flows are generated
Pyroclastic-flow terms

Tephra (definition, illustrations)
Hazard to jet aircraft
Related terms

U.S. Volcanoes

Current activity (unrest and eruptive activity)

Historical eruptions

 

More Volcano Information

Alaska

Cascade Range, Pacific Northwest

Hawaii

Long Valley caldera, California

 

Reducing Volcanic Risk

Volcano Monitoring
Gas

Ground deformation     [ Dramatic deformation at Mount St. Helens]
Electronic distance measurements     [A caldera widens at Mauna Loa]   [Mount St. Helens dome]
Global Positioning System
Tilt     [Remarkable tilt at Kilauea]   [Mount St. Helens crater floor]

Hydrology
Measuring sediment on the move
Surveying river channels
Detecting lahars     [ Field test at Redoubt Volcano]

Remote sensing (satellite)
Tracking eruption clouds
Measuring sulfur dioxide gas in eruption clouds
Detecting hot features on volcanoes

Seismicity
Unique seismic signatures

Emergency Planning
Preparing for volcano emergencies
Developing volcano emergency plans (guidelines)

Warning Schemes
Alert-levels used in United States

 

Resources

Photoglossary

FAQ's

Selected Products (publications, videos, fact sheets, maps, and other products)
Educator's page

 

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Last modification: Wednesday, 07-Feb-2001 10:52:12 EST (SRB)