Kinds
of Eruptions
Lava Flows
Agencies
|
Kinds
of Eruptions
|
||||||||||
| Kinds
of Lava Flows |
Disaster Agencies |
|||||||||
|
||||||||||
|
|
|||||||||
| Effusive Eruption | Plinian Eruption | |||||||||
| An effusive eruption happens when lava flows out and over the land. The shape of the lava and how fast it moves is determined by the minerals that it is made up of. | Plinian eruptions are the strongest eruptions. Gases and tephra are sent up to 11 miles up into the atmosphere. | |||||||||
|
|
|||||||||
| Strombolian Eruption | Eruption Cloud | |||||||||
| In Strombolian eruptions molten basaltic rock is thrown upward in strands from one vent. The eruptions come every few minutes and are caused by bursts of gases. | Clouds of tephra and gases from an eruptions spreads across the sky for hundreds of miles. | |||||||||
|
|
|||||||||
| Vulcanian Eruption | ||||||||||
| This type of eruptions explodes new volcanic material out of the volcano. This is a kind of explosive eruption that only happens if the pressure inside the volcano is extreme. | ||||||||||
| Phreatic Eruptions | ||||||||||
| Phreatic eruptions are steam and debris from the inside of a volcano. Magma heats up water below the surface and causes it to boil. When enough pressure builds up, the steam blows the top off of the volcano. | ||||||||||
| Thinkquest | Meet the Team | Site Outline | Glossary | Interactives | Links | |||||
|
Photographic
Citations: |
|
|
|
Text
Bibliography: USGS
Volcanoes: Volcano Picture Glossary
|