Home Games & Quizzes History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture Money Videos
volcano
Table of Contents
References & Edit History Related Topics
Images & Videos
Mount St. Helens volcano
How volcanoes work, explained by a volcanologist
Mount Fuji, Japan. volcanism and plate tectonics volcanoes and thermal fields
What it's like to visit an active volcano
seismic sensor pahoehoe Mount St. Helens eruption.
Classify volcanic eruptions according to the physical and chemical properties of their magma
For Students
volcano summary
Quizzes
Hawaiian volcanic crater, Hawaii
Volcanoes Quiz
Taj Mahal, Agra, India. UNESCO World Heritage Site (minarets; Muslim, architecture; Islamic architecture; marble; mausoleum)
Wonders of the World Quiz
Read Next
animated gif/infographic of the Mount Tambora eruption, April 1815. volcano. Indonesia.
How the 1815 Eruption of Mount Tambora Produced the “Year Without a Summer”
Ash cloud rising from the Kilauea Volcano Pu`u `O `o as crater floor collapses due to magma withdrawal. Incandescent rubble can be seen crumbling and rolling down the scarp. East rim of Pu`u `O `o is in the foreground, Kilauea, Hawaii on March 6, 2011.
Watch Your Step: 6 Things You Can Fall Into
Arenal Volcano in northwestern Costa Rica in the province of Alajuela.
Are Volcanoes Dangerous When They’re Not Erupting?
animated gif/infographic of the Mount Tambora eruption, April 1815. volcano. Indonesia.
Mount Tambora 200 Years Later
Mount Saint Helens (Cascade Range, southwestern Washington) spewing ash during the 1980 eruption.; Mount St. Helens
35th Anniversary of Mount Saint Helens Eruption
Discover
In this aerial photo, structures are damaged and destroyed October 15, 2005 in Balakot, Pakistan. It is estimated that 90% of the city of Balakot was leveled by the earthquake. The death toll in the 7.6 magnitude earthquake that struck northern Pakistan on October 8, 2005 is believed to be 38,000 with at least 1,300 more dead in Indian Kashmir. SEE CONTENT NOTES.
6 of the World’s Deadliest Natural Disasters
Artist interpretation of a Space meteoroid impact. Meteor impact. Asteroid, End of the world, danger, destruction, dinosaur extinct, Judgement Day, Planet Earth, Doomsday Predictions, comet
10 Failed Doomsday Predictions
Vietnam War. U.S. President Lyndon B. Johnson awards the Distinguished Service Cross to First Lieutenant Marty A. Hammer, during a visit to military personnel, Cam Ranh Bay, South Vietnam, October 26, 1966. President Johnson
Vietnam War Timeline
earthquake. Heavily damaged school in the town of Yingxiu after a major earthquake struck China's Sichuan Province on May 12, 2008.
The 6 Deadliest Earthquakes Since 1950
After a perfect launch, spectators try to catch a last glimpse of Space Shuttle Columbia, barely visible at the top end of the twisted column of smoke.
7 Accidents and Disasters in Spaceflight History
Periodical Cicada, Adult, Magicicada spp. Requires 17 years to complete development. Nymph splits its skin, and transforms into an adult. Feeds on sap of tree roots. Northern Illinois Brood. This brood is the largest emergence of cicadas anywhere
Why Do Some Cicadas Appear Only Every 17 Years?
Black widow spider
9 of the World’s Deadliest Spiders

Volcanoes are frequently classified by their size and shape (as is described in the section Volcanic landforms), but they can also be classified by their eruptive habits. Indeed, the type of volcanic eruption that occurs plays an important role in the evolution of a volcanic landform, thus forming a significant link between eruptive habit and volcanic structure. In general, eruptions can be categorized as either effusive or explosive. Effusive eruptions involve the outpouring of basaltic magma that is relatively low in viscosity and in gas content. Explosive eruptions generally involve magma that is more viscous and has a higher gas ...(100 of 12070 words)

Access the full article
Help support true facts by becoming a member.