Top 10 volcanoes factsVolcanoes quiz
In which major European city, there is a volcano that may soon erupt? In Naples.
Lying mostly underwater, Campi Flegrei comprises 24 craters. It is one of the largest volcanoes in the world, capable of producing VEI 7 (super-colossal) eruptions. Its most recent eruption of 1538 created a new hill, Monte Nuovo.
What is the typical source of pressure buildup inside a volcano? Degassing of magma.
The whole process begins when hot magma is lifted by convection to the magma chamber. As the pressure in the chamber is lower than deep in Earth's crust, the gas starts to release. Since degassed magma has lower density, it may then sink and be replaced with new one. This process may build up huge pressure of gases, eventually causing explosion.
Which continent has the least active volcanoes? Australia.
There are no active volcanoes on the Australian mainland that have erupted since European settlement, however, some volcanoes in Victoria and South Australia are likely to have been active and witnessed by Aboriginal people several thousand years ago.
Olympus Mons is the largest known volcano. Where is it? On Mars.
Olympus Mons (Latin for Mount Olympus) is a large shield volcano on the planet Mars, having a height of nearly 22 km (14 mi). Being a shield volcano, it has a very low profile. The average slope on the volcano's flanks is only 5°. Because of that, an observer standing on the Martian surface would be unable to view the entire profile of the volcano, even from a great distance.
Which island is known as "Lighthouse of the Mediterranean"? Stromboli.
Mt Stromboli has been in almost one continuous eruption for the past 2000 years, which is the longest known in the world. The volcano explodes at intervals ranging from minutes to hours. This is known as Strombolian eruption type, also observed at other volcanoes worldwide.
How many active volcanoes are there in Italy? (That have erupted during the last 100 years) 3
These are Vesuvius, Etna and Stromboli. There are several other volcanoes considered dormant, of which 7 erupted in historic times (Vulcano 1890, Isola Ferdinandea 1831, Campi Flegrei 1528, Ischia 1302, Larderello 1282, Lipari 729, Vulsini 104BC)
Which mountain is the farthest from Earth's center? Mt. Chimborazo.
Mt. Chimborazo is a currently inactive stratovolcano, and the highest point in Ecuador. Earth is not a perfect sphere and bulges at the equator. Due to it's location extremely close to the equator, it is farther away from the center of Earth than the tallest point, Everest. It is also the closest point to the moon.
Where was this photo of Etna eruption taken from? International Space Station.
Mount Etna is a stratovolcano currently standing 3,329 m (10,922 ft) high. The ash plume rises another few kilometers high, so the photo couldn't have been taken from a plane at such steep angle. It was taken from the ISS, orbiting over 330 km above Earth's surface.
Which volcano is known as being one of the most active, but at the same one of the least violent in the world? Kīlauea, Hawaii.
Kīlauea is one of the most active volcanoes on the planet and an invaluable resource for volcanologists who are able to study it up close due to its exclusively non-violent effusive activity. Kīlauea lacks a distinct peak and lies close to Mauna Loa.