Eruption Of Mount Saint Helens

Eruption of Mount St. Helens 1980 On May 18, 1980, Mount St. Helens erupted and killed of import people. This was the around recent earthquake in the main forty-eight states since 1915. Mount St. Helens is a stratovolcano located in the state of Washington. A stratovolcano is made up of hardened pumice and lava. Before 1980, the put out blow of Mount St. Helens was between 1840 and 1850. The volcano did not come to pass overnight however, it was caused by multiple earthquakes and gobs of pressure buildup through with(predicate) time. The Mount St. Helens volcano eruption was the most recent volcanic eruption that did significant damage in the United States. The administration of Mount St. Helens millions of years ago is the priming why the eruption was so violent. The Juan de Fuca Ridge, which lies between the Pacific and Juan de Fuca cuticle pushes the two crustal plates in opposite directions causing the Juan de Fuca plate to hired gun duct underneath the contine ntal plate causing a subduction zone and largish pieces of rock are pushed into the opposite plate causing a mountain to form. The magma that the Mount St. Helens produces rises from the mantle to within the volcano when water supply is released and the material becomes less dumb and its melting temperature is lowered, causing it to rise up. The magma sits in the magma domiciliate and volatiles and minerals are slowly released from the magma because of pressure. Eventually, the magma creates a care big of a cube of the volcanic cone and causes a sudden, explosive eruption, much like that of 1980. From 1840 to 1850 until 1980, Mount St. Helens remained dormant and had no signs of activity, which is common for stratovolcanoes. Many stratovolcanoes yield long dormant periods followed by active periods. On demonstrate 15, 1980 three small earthquakes were record on seismographs that happened underneath the mountain. Scientists remember that the earthquakes were caused by m agma running beneath the volcano. The magma! caused an earthquake underneath because the...If you ask to get a effective essay, order it on our website: OrderCustomPaper.com

If you want to get a full essay, visit our page: write my paper