The Past of Me!!!
These are the history of volcano and also describes some of the major eruptions.
Volcanoes are formed when magma from within the Earth's upper mantle works its way to the surface. At the surface, it erupts to form lava flows and ash deposits. Over time as the volcano continues to erupt, it will get bigger and bigger.
Most volcanoes occur near the edges of plates. When plates push together, one plate slides beneath the other. This is a subduction zone. When the plunging plate gets deep enough inside the mantle, some of the rock on the overlying plate melts and forms magma that can move upward and erupt at the Earth's surface. On May 18, 1980, Mount St. Helens violently erupted. For 2 months the volcano showed signs that it was waking up from its 123-year sleep. Earthquakes beneath the mountain increased. Steam and ash erupted. And a "bulge" grew on the mountain's steep north side. All these warning signs signaled that magma was moving upward inside the volcano. Some of major eruption: KRAKATOA and the other names are Vesuvius, Tambora or Santorini. Images immediately come to mind of volcanic events of interest that happened sometime in history in some far-away place. Mt. Etna shooting red-hot lava 1,000 feet into the sky and citizen. No one knows when or if a massive eruption will come, but if a large eruption occurs much of Sicily and all of southern Italy and Greece would be affected. Unanticipated eruptions have taken an enormous toll in lives and property and upon the environment throughout history. Santorini is a small volcanic island in the Aegean Sea off the coast of Greece that erupted in 1650bc. It is considered to be the largest volcanic eruption in the last 10,000 years. In 167bc, a small cone appeared in the Santorini caldera that has grown to be the Kameni Islands. This relatively new but small volcano has erupted 11 times since its creation, most recently in 1950 on the northern island of Nea Kameni. Geologists believe that Santorini itself developed in the caldera of an earlier volcano, and that eventually the Kameni volcano will become a threat to European and Mediterranean populations. The Year Without a Summer On 5 April 1815, the eruption of Indonesia's Mount Tambora was one of the largest eruptions in history. Tambora spewed sulphur-rich gases that rose to a height of 28 miles and created a giant sun filter in the northern hemisphere that caused the spring and summer of 1816 to be extremely cold across Europe and North America.
http://www.history-magazine.com/volcanoes.html http://www.weatherwizkids.com/weather-volcano.htm