One interesting fact about underwater volcanoes is that they deposit about 75 percent of the annual magma output on Earth. The molten magma and hardened lava shape the ocean floor and create the edges of the new plates on the ocean floor.Know More
The largest underwater volcano is the Krakatau, a volcanic island between Sumatra and Java in Indonesia. It is mostly a submerged caldera, a basin-shaped volcanic depression formed from a previous powerful volcanic eruption. Located in the Sundra Strait, Krakatau is approximately 5.5 miles long and 3 miles wide.
Underwater or submarine volcanoes are commonly found in ocean ridges or areas where tectonic plates move away or towards each other. Because most of these volcanoes are submerged, they do not produce the same spectacular volcanic eruption like some of their terrestrial counterparts. Their constant activity, however, greatly transforms the majority of the oceanic crust.
It is also an interesting fact that the chain of islands in the Pacific, specifically the Hawaiian Islands, is formed through continuous volcanic eruptions. The Hawaiian hot spot, which sits near the Pacific Plate, is responsible for the formation of the Big Island in Hawaii. The largest island in the state is also home to five volcanoes, of which three are active. Other hot spots are found in other parts of the world, such as Galapagos Islands and Iceland.Learn more about Volcanoes
Cinder cone volcanoes form when high temperatures and pressure melt rock deep inside the Earth. Once a large amount of magma forms, it rises until it reaches the surface, creating an eruption.Full Answer >
Volcanoes form when molten rock from beneath Earth's surface erupts and solidifies on the surface. When beneath the ground, the molten rock is called magma. When it erupts, it is referred to as lava. With each eruption, the volcano increases in size.Full Answer >
Some facts about composite volcanoes include the fact that some of the best-known mountains around the world are composite volcanoes. This list includes Mount Fuji in Japan, Mount Hood in Oregon and Mount St. Helens and Mount Rainier in the state of Washington.Full Answer >
An interesting fact about the volcanoes in Hawaii is that although there are five active volcanoes, only three have been active in the last 200 years. These volcanoes are Kilauea, Mauna Loa and Hualalai. The other two active volcanoes are Haleakala and Lo'ihi.Full Answer >