The only volcanic stone floating on the surface of the water is volcanic pumice. It is characterized by a gray color, this stone is permeated with hollow holes formed when the stone is cooled. This process was accompanied by the release of gases, which formed holes.
The eruptions of the largest volcanoes, called super volcanoes, often cause terrible consequences. This is the fiery rain shedding for miles around the volcano itself, and global climate changes caused by the ingress of ash into the atmosphere. Fortunately, such volcanoes erupt on average several times in 100,000 years. About one of them, located on the territory of the Yellowstone National Park, scientists claim that, in all probability, ready for another eruption.
The largest of the observed eruptions is the activity of the Tambor volcano on the Indonesian island of Sumbava. The eruption claimed the lives of 100,000 people. According to researchers, Indonesia has the largest number of historically active volcanoes. There are 76 in all.
Most volcanoes appear on the boundaries of tectonic plates, which form the surface of the earth. Other volcanoes, for example, Yellowstone, are in other "hot spots" with magma bursting from the depths of the earth.
Iceland, also called the land of fire and ice, is endowed with nature by the largest number of volcanoes in the region, called the Mid-Atlantic Atlantic Ridge. The recent eruption of Eyyafyatlayokudl, which has shaken many, is immeasurably weaker than the explosion of Skaptar, which caused a terrible damage to the food reserves of the island and caused famine, which caused the death of twenty percent of the population.
Citing interesting facts about volcanoes, one can not help but tell about the serious consequences of the eruption of the volcano Pinatubo that occurred in the Philippines in 1991. As a result of the release of 22 million tons of sulfur compounds by the volcano into the atmosphere of the planet, the temperature dropped by 0.5 degrees.
Extinct volcanoes are called in the case when scientists believe that their eruptions will no longer be. About volcanoes with a quiet for a while they say that they are asleep.
If during the eruption of the volcano the walls that constrain the lava are destroyed, then a huge crater appears, which is called the caldera.
The Kelimutu volcano, located in Indonesia, has three unusual lakes on the top. Water in each of them periodically acquires various colors - turquoise, green, black or red. These transformations are caused by the reaction of volcanic gases, which react chemically with various minerals that are dissolved in water. This is the reason for the change in the color of the lakes.
The highest volcano of the Earth is Mauna Loa in Hawaii. Its height is 4 thousand meters above sea level. There are five volcanoes on this island.
During eruptions of volcanoes, fine particles of ash are released into the atmosphere, capable of scattering solar rays. This gives the atmosphere coral and orange shades and adds colorful sunsets.
Among the attractions of the island of Lanzarote from the Canary Islands group restaurant with a sonorous name El Diablo (from Spanish translates as "devil"). The cooks of this restaurant prepare food directly above the mouth of the active volcano. We note that its temperature exceeds 400 ° C.
Scientists consider the Indonesian archipelago to be part of the earth's crust, which is in the process of becoming. In this case, some islands gradually or unexpectedly appear from the sea depths, while others are immersed in it. This is a consequence of frequent earthquakes, impacts of a large number of active volcanoes, and the growth of coral reefs. Such changes require frequent amendments to the map of Indonesia.
Located on the island of Kiu-Shiu in Japan, the volcano called Aso is the largest volcano in the world. The crater of the volcano has a width of 14 kilometers, a length of 23 kilometers and a depth of 500 meters.