A volcano is a crack in the earth’s across lava and gases escape. Volcanic eruptions are partly driven by the pressure of dissolved gas, in the same way, that the escaping gases force the cork out of a bottle of champagne. Read below 16 volcano facts.


Under a volcano, liquid magma containing dissolved gases rises through cracks in the earth’s crust. As magma increases, the pressure decreases, allowing gases to form bubbles.


The behavior of magma (lava), when it reaches the surface, depends on both its gas content and its chemical composition.



Volcano facts


Simply put, a volcano is an opening (usually on a mountain) on the surface of the Earth from gas, hot magma, and ash can escape.



The word “volcano” comes from the Roman name “Vulcano”, the Roman god of fire.



Volcanoes are often found at the meeting points of the so-called “tectonic plates”.


tectonic plates


These plates are pieces of the Earth’s surface that come together like a puzzle.



However, volcanoes are not only found within the boundaries of tectonic plates. They can also occur in “mantle feathers”, super hot rock areas within the Earth.



Volcanoes are classified as active, inactive or extinct depending on the amount of volcanic activity that occurs.


tectonic plates
volcano facts


The active mode that there is an orderly process, inactive mode that there have been early process but that it is presently quiet and “extinct”, which mean that it has been so long since the last eruption that it is unlikely that it will erupt again.



When you imagine a volcano, you can imagine it as a large mountain with a slope, but volcanoes can have a variety of shapes.

Shield (flat), compound (tall and thin), ash cones (circular or oval cones) and lava domes (where dome-hardened lava deposits have accumulated around the vent since the lava is too thick for flow too far).



Magma is the name given to the hot liquid rock inside a volcano. Once it leaves the volcano, it is known as lava.



Volcanoes not only occur on land, but they can also be found at the bottom of the ocean and under polar ice caps!



.Lava can outreach 1,250 ° C and has the power to burn everything in its path If you used a glass thermometer to measure the temperature, it would melt



The largest active volcano in the world is Mauna Loa in Hawaii, with a height of 4,169 m!



In the year 79 d. C., Mount Vesuvius erupted, devastating the Italian city of Pompeii. The ash deposits preserved the city and the remains of the people who compose it. You can still see them today!



The “Ring of Fire”, a horseshoe-shaped area of ​​40,000 km from the Pacific Ocean, houses 90% of all volcanoes on Earth.



Around 1,900 volcanoes on Earth are considered active and are likely to explode again, go!



In 1883, Krakatau in Southeast Asia erupted, releasing 200 megatons of energy, the equivalent of 15,000 nuclear bombs! This generated the loudest sound reported in history.



It is said that the soil near the volcanoes is rich and fertile, so some people really settle on the slopes!



And it’s not just humans who settle on the slopes, Malley birds use the heat of volcanoes to help hatch their eggs! They bury the eggs in the ground or in the sand near the volcanoes. When the chicks hatch they make their way to the surface.



Another volcano facts


The lava of low viscosity (runoff), such as basalt that contains a lot of gas, forms sources of fire, which throw spectacularly into the air and break into balloons that solidify as they fall to the ground. Small eruptions of fire sources produce cinder cones.



However, when liquid lava contains less gas, it erupts as lava flows spill. Repeated eruptions of the fire source and lava flow over long periods form gently sloping shield volcanoes such as Anahim Peak in central British Columbia and the volcanoes of the Hawaiian Islands.



The andesite, dacite, and rhyolite lavas are progressively higher in silica and more viscous, so gases cannot gradually escape.

If high-silica lavas contain little trapped gas, they can slowly ooze on the surface to pile up like steep lava domes.


When high-silica lavas contain a lot of trapped gas, the pressure builds up and is released in explosive eruptions that produce volcanic ash.