Web Results


The two basic types of volcanic eruptions are effusive and explosive eruptions. In effusive eruptions, magma flows to the surface and down the sides of the volcano as lava. In explosive eruptions, magma violently rips through the top portion of the volcano and reaches t...


Quiet eruptions are volcanic eruptions that explode gently, with broad sheets of slowly flowing lava. Shield volcanoes, such as those in Hawaii, are commonly associated with quiet eruptions.


Volcanic eruptions can either be effusive or explosive. An effusive volcanic eruption occurs when the lava pours out onto the ground from the volcano's vent. When the molten rock or magma is thin and runny, gases can easily escape and the lava flows freely and travels f...


A volcano erupts through the build-up and release of pressure, whether that pressure is of its underlying magma, water or both. This release can be explosive, as it was in the famous eruption of Mt. Vesuvius that destroyed Pompeii, or it can be slow and effusive, as it ...


Volcanoes erupt due to pressure that the weight of the rocks puts on the magma and forces it to the surface out any available vent or exit provided to it. The magma is in a reservoir like area under the surface and the pressure from the rocks causes the less dense magma...


A volcano erupts when the pressure of a subterranean pool of magma becomes great enough to crack the earth's crust. Whether the eruption results in a violent explosion or a slow seepage depends on several different factors, according to How Stuff Works.


A volcanic eruption is the expulsion of magma and gas from the Earth's interior. Most current volcanic eruptions are the result of one of three eruption mechanisms.