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'Atlantis' volcano gives tips for mega-eruptions

Around 1630 BC, a super-volcano blew apart the Aegean island of Santorini, an event so violent that some theorists say it nurtured the legend of Atlantis.

Space & Earth / Earth Sciences

created Feb 01, 2012 | popularity 4.8 / 5 (6) | comments 2

Fine, jagged ash increased Eyjafjallajokull volcano's influence

The 2010 eruption of Eyjafjallajökull volcano was not a large event. Over months of volcanic activity the ash plume never pushed above 10 kilometers (6.2 miles), and the mass flows peaked at 1 million kilograms per second ...

Space & Earth / Earth Sciences

created Jan 31, 2012 | popularity 5 / 5 (1) | comments 0

Project to pour water into volcano to make power

(AP) -- Geothermal energy developers plan to pump 24 million gallons of water into the side of a dormant volcano in Central Oregon this summer to demonstrate new technology they hope will give a boost to a ...

Technology / Energy & Green Tech

created Jan 14, 2012 | popularity 3.5 / 5 (18) | comments 27

NASA radar to study Hawaii's most active volcano

(PhysOrg.com) -- An airborne radar developed by NASA's Jet Propulsion Laboratory, Pasadena, Calif., has returned to Hawaii to continue its study of Kilauea volcano, Hawaii's current most active volcano.

Space & Earth / Earth Sciences

created Jan 10, 2012 | popularity 3 / 5 (1) | comments 0

As Voyager 1 nears edge of solar system, scientists look back

(PhysOrg.com) -- In 1977, Jimmy Carter was sworn in as president, Elvis died, Virginia park ranger Roy Sullivan was hit by lightning a record seventh time, and two NASA space probes destined to turn planetary ...

Space & Earth / Space Exploration

created Dec 13, 2011 | popularity 5 / 5 (11) | comments 1 | with audio podcast

Lava fingerprinting reveals differences between Hawaii's twin volcanoes

Hawaii's main volcano chains -- the Loa and Kea trends -- have distinct sources of magma and unique plumbing systems connecting them to the Earth's deep mantle, according to UBC research published this week ...

Space & Earth / Earth Sciences

created Nov 30, 2011 | popularity 3.5 / 5 (4) | comments 0 | with audio podcast

Tourists invited to see erupting Congo volcano

(AP) -- Virunga National Park is inviting tourists on an overnight trek to a spectacular eruption of Mount Nyamulagira in eastern Congo.

Space & Earth / Earth Sciences

created Nov 14, 2011 | popularity 5 / 5 (1) | comments 0

Battered Tharsis Tholus volcano on Mars

(PhysOrg.com) -- The latest image released from Mars Express reveals a large extinct volcano that has been battered and deformed over the aeons.

Space & Earth / Space Exploration

created Nov 09, 2011 | popularity 3.7 / 5 (3) | comments 0

Orange smoke billows out of Congolese volcano

Clouds of orange smoke and ash billowed out of Africa's most active volcano Nyamulagira, in the Democratic Republic of Congo, Tuesday after it erupted spectacularly at the weekend.

Space & Earth / Earth Sciences

created Nov 08, 2011 | popularity 5 / 5 (1) | comments 9

Mapping the formation of an underwater volcano

On Oct. 9 an underwater volcano started to emerge in waters off El Hierro Island in the Canaries, Spain. Researchers of the Spanish Institute of Oceanography (IEO, Ministry of Science and Innovation) only needed 15 days to ...

Space & Earth / Earth Sciences

created Oct 28, 2011 | popularity not rated yet | comments 0

A birthplace for primitive life on Earth?

The mud volcanoes at Isua, in south-west Greenland, have been identified as a possible birthplace for life on Earth by an international team headed by researchers from the Laboratoire de Géologie de Lyon: ...

Space & Earth / Earth Sciences

created Oct 24, 2011 | popularity 5 / 5 (3) | comments 0

Fiery volcano offers geologic glimpse into land that time forgot

The first scientists to witness exploding rock and molten lava from a deep sea volcano, seen during a 2009 expedition, report that the eruption was near a tear in the Earth's crust that is mimicking the birth ...

Space & Earth / Earth Sciences

created Oct 19, 2011 | popularity 5 / 5 (2) | comments 0

Research group finds ancient deep sea mud volcano as possible site for origin of life

(PhysOrg.com) -- An international consortium of scientists and researchers has been studying some ancient rocks found on the southwestern coast of Greenland. They believe the rocks were once part of a deep ...

Space & Earth / Earth Sciences

created Oct 18, 2011 | popularity 4.4 / 5 (5) | comments 2 | with audio podcast weblog

Possible trigger for volcanic 'super-eruptions' found

The "super-eruption" of a major volcanic system occurs about every 100,000 years and is considered one of the most catastrophic natural events on Earth, yet scientists have long been unsure about what triggers ...

Space & Earth / Earth Sciences

created Oct 12, 2011 | popularity 4.9 / 5 (22) | comments 20 | with audio podcast

Alert level lowered on remote Alaska volcano

(AP) -- The Alaska Volcano Observatory has lowered the alert level for a remote Aleutian Islands volcano from "watch" to "advisory."

Space & Earth / Earth Sciences

created Aug 31, 2011 | popularity not rated yet | comments 0

Volcano

A volcano is an opening, or rupture, in a planet's surface or crust, which allows hot, molten rock, ash, and gases to escape from below the surface. Volcanic activity involving the extrusion of rock tends to form mountains or features like mountains over a period of time. The word volcano is derived from the name of Vulcano island off Sicily. In turn, it was named after Vulcan, the Roman god of fire.

Volcanoes are generally found where tectonic plates are diverging or converging. A mid-oceanic ridge, for example the Mid-Atlantic Ridge, has examples of volcanoes caused by divergent tectonic plates pulling apart; the Pacific Ring of Fire has examples of volcanoes caused by convergent tectonic plates coming together. By contrast, volcanoes are usually not created where two tectonic plates slide past one another. Volcanoes can also form where there is stretching and thinning of the Earth's crust (called "non-hotspot intraplate volcanism"), such as in the African Rift Valley, the Wells Gray-Clearwater volcanic field and the Rio Grande Rift in North America and the European Rhine Graben with its Eifel volcanoes.

Volcanoes can be caused by mantle plumes. These so-called hotspots, for example at Hawaii, can occur far from plate boundaries. Hotspot volcanoes are also found elsewhere in the solar system, especially on rocky planets and moons.

For more information about Volcano, read the full article at Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.