Volcano Hazards Program Photo Glossary

Please click on the terms below to view the image and definition.

| Relationship among key terms | Other USGS volcano photo galleries |

debris avalanche

earthquake glossary

effusive eruption

phreatic eruption

plinian eruption

pyroclastic flow

spatter cone and rampart

spatter and cinder cone

Strombolian eruption

Vulcanian eruption

Relationship among key terms

Type of Volcano or vent

Eruption Types

Eruptive Products

Other USGS volcano photo galleries

Hawaiian volcanism

Long Valley caldera and Mono-Inyo Craters volcanic chain
Photo archives of the USGS Cascades Volcano Observatory

USGS earthquake image glossary

USGS Earthquake Hazards Program