Volcanoes are often associated with fire, earthquakes, victims and damage. The activity of nature often turns peaceful mountains with smoky tops into fire vents with lava and smoke getting out and turning everything into fire and burning it.
Why do volcanoes erupt and where does such an incredible energy get from inside the earth?
After the radioactivity phenomenon was discovered, especially one of uranium and thorium, scientists began to understand that the heat is conserved inside the earth because of the radioactive decay of some chemical elements. The studies made in the field of nuclear energy problems proved this fact again.
Accumulation of heat energy inside the earth makes the earth matter heated. The temperature gets so high that the matter has to melt but under the high pressure of the upper earth layers it stays solid. In the places where the pressure of the upper earth layers is not so high (it happens because of the motion of crust and in the places with tectonic cracks) the heated masses transform from solid phase into liquid.
The masses of melted rock saturated by gases in the deep layers of earth are called magma. Under the high pressure of releasing gases, magma passes the way and forms volcanic vent or volcanic canal. Released gases, by the means of explosions free the way for lava, breaking and throwing the pieces of rock on high altitude. This phenomenon is also followed by earthquakes in the environs of volcano.
The volcano starts by eruption of post of black smoke on the altitude from 1 to 5-kilometer. Then it gets wide and more intensive at the same time pieces of rock are also erupted from the volcano's vent. The amount of pieces of rocks, gasses, smoke and ashes...
Earth Science Ring of Fire Ring of Fire originally aired on the National Geographic Channel in August, 2007 as part of the Naked Science series produced by Ben Fox and Ian Hunt. The hour-long Ring of Fire program focuses on scientific efforts to understand the danger posed by the 25,000-mile long chain of volcanoes and earthquakes that makes up the Ring of Fire. The video explores scientific explanations for a rise in
Magma and gasses building up just below the surface before an eruption can cause a bulge many miles in diameter. Since they are so large, these swells cannot be seen by the naked eye (Kerr, 2003). Satellite-borne radars alert volcanologists when such bulges appear. The satellites monitor global positioning (GPS) devices on the ground, using triangulation to mark whether the ground is bulging. Yet, again, the lack of a
This happens as the magma chamber empties and a ring fracture occurs. This collapse often blocks the flow of magma but the heated interior still produces gasses and steam. Often, that steam and other gasses create a lake in the middle of the caldera similar to Crater Lake in Oregon or Glen Coe in Scotland. 8. WHY DO SOME VOLCANOES EXPLODE, WHILE OTHERS EMIT ONLY GASEOUS CLOUDS? Some volcanoes explode because
Tsunamis A succinct definition of a tsunami is " ... A natural phenomenon consisting of a series of waves generated when water in a lake or the sea is rapidly displaced on a massive scale. ( Wikipedia: Tsunami) A more explicit and technical definition is, " A tsunami is a very long-wavelength wave of water that is generated by sudden displacement of the seafloor or disruption of any body of standing
Bibliography Kious and Tilling, 1996, This Dynamic Earth: The Story of Plate Tectonics: USGS Special Interest Publication in: Ring of Fire, Plate Tectonics, Sea-floor Spreading, Subduction Zones, Hot Spots (nd) USGS/Cascades Volcano Observatory, Vancouver, Washington. Online available at: http://vulcan.wr.usgs.gov/Glossary/PlateTectonics/description_plate_tectonics.html Mian, Z. (1993) Understanding Why the Earth is a Planet with Plate Tectonics. R.A.S. Quarterly Journal Vol.34 No.4 Dec 1993. Online available at Harvard at: http://articles.adsabs.harvard.edu//full/1993QJRAS..34..441M/0000443.000.html Ring of Fire, Plate Tectonics, Sea-floor Spreading, Subduction
Slide 9: Technological innovations in emergency management The starting point in the creation of a plan on how to improve our program from a technological standpoint has been constituted by the review of the it industry. The scope of this research has been that of identifying the innovations in the field and their relevance for our agency and its mission. The results of the research endeavor are briefly presented below: GIS is
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