According to the Global Volcanism Program at the Smithsonian Institution, as of December 2014, there have been a little over 400 confirmed eruptions in the world since January 2004. These eruptions range on the Volcanic Explosivity Index, or VEI, from 0 up to 5. A VEI of 0 to 1 is very small, while 5 is classified as very large.Continue Reading
Many volcanoes erupt every day, all over the world. Some are very small and have little to no effect on the surrounding environment. The degree and danger of the volcano's explosiveness is in direct relation to the amount of gas trapped in its magma and how easily the magma can flow out of the volcano.
There are three basic types of volcanoes:
Steep-sided volcanoes, or stratovolcanoes, are primarily made from multiple layers of cinders and ash that were laid down during past eruptions. According to Oregon State University, stratovolcanoes are distinct from shield volcanoes due to their high altitude and steeply graded sides.Full Answer >
A composite cone volcano, or a stratovolcano, is built by multiple eruptions from surrounding volcanoes. They are formed over hundreds of thousands of years and have their entire structure build by magma flowing from geographically close volcanoes.Full Answer >
VolcanoDiscovery.com is a website created and maintained by an international group of scientists and volcanologists that provides up-to-date information on current volcanic eruptions around the world. The Smithsonian's Global Volcanism Program also publishes regular eruption reports on its official website, Volcano.si.edu.Full Answer >
Names of some of the world's most famous volcanoes include Mount Vesuvius, Krakatoa, Mount St. Helens and Mount Tambora. While some of these volcanoes are known to be dangerous, as of 2015 some have not been active for over 100 years.Full Answer >