A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.
On Earth, volcanoes are most often found where tectonic plates are diverging or converging, and most are found underwater. For example, a mid-ocean ridge, such as the Mid-Atlantic Ridge, has volcanoes caused by divergent tectonic plates whereas the Pacific Ring of Fire has volcanoes caused by convergent tectonic plates. Volcanoes can also form where there is stretching and thinning of the crust's plates, such as in the East African Rift and the Wells Gray-Clearwater volcanic field and Rio Grande rift in North America. Volcanism away from plate boundaries has been postulated to arise from upwelling diapirs from the core–mantle boundary, 3,000 kilometers (1,900 mi) deep in the Earth. This results in hotspot volcanism, of which the Hawaiian hotspot is an example. Volcanoes are usually not created where two tectonic plates slide past one another.
Large eruptions can affect atmospheric temperature as ash and droplets of sulfuric acid obscure the Sun and cool the Earth's troposphere. Historically, large volcanic eruptions have been followed by volcanic winters which have caused catastrophic famines.Other planets besides Earth have volcanoes. For example, Mercury has pyroclastic deposits formed by explosive volcanic activity.
the perfect cone of Mayon Volcano in Albay province, Bicol region, Philippines
At the heart of Pili Ani is the “Giving Tree” or Pili Tree, an amazing feat of nature that grows in the shadow of the Mayon Volcano. Located in the Albay Province of the Bicol region, Mayon is the most active volcano...
Mount Everest is the tallest mountain on earth, reaching 5.5 miles into the sky. However, you'd need to stack three Everests on top of each other in order to create something as massive as Mars' Olympus Mons, the largest volcano in the solar system. The enormous volcano is 16 miles tall and...
There's a chapel in Spain that's inside of a volcano
If you want to visit the Santa Margarida de Sacot chapel, you won't just have to head to northeastern Spain, you'll also have to trek down into a crater that sits inside of a 2,238-foot volcano. The original structure was built during the...
The Philippine Institute of Volcanology and Seismology (PHIVOLCS) released new photos of Mayon volcano's summit on Saturday, where a new lava dome can be seen emerging.
PHIVOLCS posted the new photos on social media with a caption that described what was going on at Mayon's summit.
"A new...