What type of volcanic eruptions?
seem to occur most often where plates are coming apart or in the middle of a plate"?
- Anonymous1 decade agoFavorite Answer
volcanic eruptions differ on where the volcano is situated. example,in Hawaii which sits on a hotspot,the eruptions here are gentle due to the chemical make up of the magma. the magma here is 70% basalt, which makes the lava very runny,and also the magma doesn't hold in as much gasses. However,Volcanic eruptions on a destructive plate boundary are very powerful. The eruptions here can cause cataclysmic affects,even on a global scale. The magma here is highly volatile and is 70% silica,which thickens the magma,and in turn holds in more gasses,this is what makes it explode with so much force. It is not only magma that is released put also pyroclastic debris and large ammounts of gasses such as carbon dioxide and sulphur dioxide. As the sulphur dioxide enters the atmosphere, it blocks out the sun's heatand cools the earth,but the carbon dioxide keeps in the sun's heat and warms the earth up.
- Anonymous6 years ago
In order to understand about volcanic eruptions, one must know what lies beneath the surface of earth. There are four layers – the crust, mantle, outer core and the inner core. The temperature inside the core layers is very high around 5000 to 7000 degree Fahrenheit. The Earth is therefore a huge ball of hot molten rock surrounded by a few kilometers of relatively cool hard rock – the crust.
A volcano is an opening in the earth’s crust through which magma, or molten rock, escapes from the earth’s interior. The term could also be applied to the mountain of debris that surrounds the earth. Built up over the course of thousands of years, volcanoes may grow into enormous size. They tend to be located along the unstable areas of earth’s crust where crustal plates are moving apart and along continental margins where they are colliding.
When magma erupts on the surface, it is known as lava and is the usual form of erupted material. Emerging at a temperature of 2000 degree Fahrenheit or more, some lava are very fluid. They can flow many miles before they could solidify. Other lavas with a different mineral composition and temperature are much less runny and solidify more rapidly and form a plug that ends the eruption. Eventually the gases in the magma build up enough pressure to blast away the plug with an explosion that hurls many solid fragments into the sky.
- seeleyLv 43 years ago
Explosive eruption, i assume.. because of the fact stratovolcano, that's tall and steep produces silica-wealthy lava that pass slowly yet hardened rapid. So, a steep volcano could be produced.