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Oregon State University

Oregon State University
Members of the Volcanic Risks Solutions team at Massey University in New Zealand have successfully predicted a volcanic eruption. A volcanic eruption of their creation, that is. Picture: The Volcanic Risks Solutions team; Shane Cronin, Eric Breard (top), Dr Gert Lube and Professor Jim Jones with the Tower of Doom. This team, led by Professor Shane Cronin and Dr Gert Lube, has created the world's first research project to investigate pyroclastic flows. Pyroclastic flows are flows of a mixture of hot gas and particles that are emitted during a volcanic eruption, particularly like the eruptions found in New Zealand. Understanding the physical properties of pyroclastic flows, the velocities and temperatures involved is the first step in understanding this devastating natural hazard that has cost many lives in eruptions around the world, such as at Mt St Helens, USA, Mt Unzen in Japan and at Merapi, Indonesia's most active volcano.

Related:  Earth Science Resources- Volcanoes

USGS Photo Glossary of volcanic terms Volcano Hazards Program USGS Photo Glossary of volcanic terms | Relationship among key terms | Other USGS volcano photo galleries | Relationship among key terms Other USGS volcano photo galleries USGS earthquake image glossary Anatomy of a Volcano By Lexi Krock Posted 11.12.02 NOVA What’s the difference between lava and magma? What are volcanic vents, dikes, and fissures? In this anatomy of a volcano, explore the basic geological features of a volcano such as Mt. Fun Volcano Facts for Kids - Interesting Facts about Volcanoes Volcanoes are openings in the Earth’s surface. When they are active they can let ash, gas and hot magma escape in sometimes violent and spectacular eruptions. The word volcano originally comes from the name of the Roman god of fire, Vulcan. Volcanoes are usually located where tectonic plates meet. This is especially true for the Pacific Ring of Fire, an area around the Pacific Ocean where over 75% of the volcanoes on Earth are found.

List of large volcanic eruptions in the 21st century From Wikipedia, the free encyclopedia This is a list of volcanic eruptions of the 21st century measuring a Volcanic Explosivity Index (VEI) of at least 4, as well as notable smaller eruptions. Note that the size of eruptions can be subject to considerable uncertainties. See also[edit] PBS Media Volcanism Volcanoes are one of the most dynamic, powerful, and visible forces on Earth. What are volcanoes and what factors cause them to form in certain areas? How are geothermal features like fumaroles and geysers related to these temperamental mountains? Let us start by looking at the volcano itself and learn the different parts of it, the rocks associated with it, and where volcanoes form.

How Volcanoes Work" Whenever there is a major volcanic eruption in the world, you'll­ see a slew of newspaper articles and nightly news stories covering the catastrophe, all stressing a familiar set of words -- violent, raging, awesome. When faced with a spewing volcano, people today share many of the same feelings volcano-observers have had throughout human history: We are in awe of the destructive power of nature, and we are unsettled by the thought that a peaceful mountain can suddenly become an unstoppable destructive force! While scientists have cleared up much of the mystery surrounding volcanoes, our knowledge has not made volcanoes any less amazing. In this article, we'll take a look­ at the powerful, violent forces that create eruptions, and see how these eruptions build volcanic structures like islands. ­When people think of volcanoes, the first image that comes to mind is probably a tall, conical mountain with orange lava spewing out the top. There are certainly many volcanoes of this type.

Volcano A 2007 eruptive column at Mount Etna producing volcanic ash, pumice and lava bombs Santa Ana Volcano, El Salvador, a close up aerial view of the nested summit calderas and craters, along with the crater lake as seen from a United States Air Force C-130 Hercules flying above El Salvador. Erupting volcanoes can pose many hazards, not only in the immediate vicinity of the eruption. One such hazard is that volcanic ash can be a threat to aircraft, in particular those with jet engines where ash particles can be melted by the high operating temperature; the melted particles then adhere to the turbine blades and alter their shape, disrupting the operation of the turbine. Large eruptions can affect temperature as ash and droplets of sulfuric acid obscure the sun and cool the Earth's lower atmosphere (or troposphere); however, they also absorb heat radiated up from the Earth, thereby warming the upper atmosphere (or stratosphere).

Oregon State University Volcanic activity is the most powerful force in nature. Some volcanic eruptions are much more powerful than the largest nuclear explosion. Volcanoes have killed thousands of people and have created some of the most frightening events in human history. Volcanoes have been the basis for myths and legends the world over. Volcanoes are also responsible for much of the land we live on, 90% of all the continents and ocean basins are the product of volcanism. The air we breathe, and the water we drink have been produced by millions of years of eruptions of steam and other gases.

Weather Wiz Kids weather information for kids Volcanoes (Volcanoes are not associated with weather, but instead are natural disasters.) What is a volcano?A volcano is a mountain that opens downward to a pool of molten rock below the surface of the earth. When pressure builds up, eruptions occur. Oregon State University The volcanic mountain in this picture is Mayo Volcano on the island of Luzon in the Philippines. Mayon is a beautiful example of a stratovolcano. This is a model of the interior and exterior of a stratovolcano. The letters represent important terms that you need to know to understand how volcanoes are formed and how they work.