Volcano - Wikipedia
A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.. Earth's volcanoes occur because its crust is broken into 17 major, rigid tectonic plates that float on a hotter, softer layer in its mantle. Therefore, on Earth, volcanoes are generally found where tectonic plates are ...
USGS: Volcano Hazards Program
USGS: Volcano Hazards Program - The Alaska Volcano Observatory website (AVO) includes complete information about volcanoes in Alaska.. Mount Cleveland, located in the central Aleutian Islands, has been in a state of volcanic unrest since June 17, 2015.Explosive eruptions can send ash to altitudes hazardous to aviation.
volcano | Definition, Types, & Facts | Britannica.com
Volcano: Volcano, vent in the crust of the Earth or another planet or satellite, from which issue eruptions of molten rock, hot rock fragments, and hot gases. The term volcano can also refer to the landform created by the accumulation of solidified lava and volcanic debris near the vent.
Volcano | Definition of Volcano by Merriam-Webster
Volcano definition is - a vent in the crust of the earth or another planet or a moon from which usually molten or hot rock and steam issue; also : a hill or mountain composed wholly or in part of the ejected material. How to use volcano in a sentence.
Volcano Facts and Types of Volcanoes - Live Science
A volcano is an opening in Earth's crust where magma breaks through, raining down molten rock, ash and gases. There are several types of volcanoes.
Volcano - Simple English Wikipedia, the free encyclopedia
A volcano is a mountain that has, or had, lava (hot, liquid rock) come from a magma chamber under the ground. Volcanoes are formed by the movement of tectonic plates.. Most volcanoes have a volcanic crater at the top. when a volcano is active, materials come out of it.the materials include lava, steam, gaseous sulfur compounds, ash and broken rock pieces. ...
Hawaiian Volcano Observatory - volcanoes.usgs.gov
Volcano Watch Volcano Watch is a weekly article and activity update written by U.S. Geological Survey Hawaiian Volcano Observatory scientists and colleagues.
Volcano facts and information - National Geographic
But each volcano is different. Some burst to life in explosive eruptions, like the 1991 eruption of Mount Pinatubo, and others burp rivers of lava in what's known as an effusive eruption, like the ...
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Volcano Communications Group Offer. STORM DAMAGE AFFECTING SERVICES As a result of the recent storm damage affecting the Highway 26 corridor, Volcano Communications Group’s facilities, which deliver services to many of the residents of Calaveras County, have been greatly threatened.