What is under a volcano?
What is under a volcano?
This melted rock is known as magma. And anything that erupts magma is a volcano. Under volcanoes are giant pools filled with piping hot mush.
What is a hot spot volcano?
A hot spot is a region deep within the Earth’s mantle from which heat rises through the process of convection. This heat facilitates the melting of rock. The melted rock, known as magma, often pushes through cracks in the crust to form volcanoes. Instead it occurs at abnormally hot centers known as mantle plumes.
Where does a hot spot volcano form?
Hot spot volcanoes occur far from plate boundaries. Because the hot spot is caused by mantle plumes that exist below the tectonic plates, as the plates move, the hot spot does not, and may create a chain of volcanoes on the Earth’s surface.
What kind of volcano usually forms over a hot spot?
As hotspot material rises, the pressure drops so the hotspot begins to melt producing magma . In an oceanic hotspot environment, for example Hawaii, dark, silica -poor basalt magma is produced. The runny basalt forms broad sloping shield volcanoes (Fig. 6).
What is the simplest type of volcano?
Cinder cones
What is volcano in simple words?
A volcano is an opening in the earth’s crust through which lava, volcanic ash, and gases escape. Beneath a volcano, liquid magma containing dissolved gases rises through cracks in the Earth’s crust.
How do volcanoes get their shape?
Volcanoes have several shapes, which are controlled by the composition of the magma and the nature of its eruption. If a volcano produces very fluid lava (low in the compound SiO2, or silica), the magma flows a long distance before it cools, making a flat, shield-shaped volcano.
What is the most dangerous type of volcano Why?
Composite volcanoes are some of the most dangerous volcanoes on the planet. The viscous lava cannot travel far down the sides of the volcano before it solidifies, which creates the steep slopes of a composite volcano. Viscosity also causes some eruptions to explode as ash and small rocks.
What is the most dangerous volcano and why?
The quick answer: Vesuvius volcano in the Gulf of Naples, Italy. The reason is that Vesuvius’ typical eruptions are very explosive and the slopes of the volcano and immediate area surrounding the volcano are extremely densely populated; even the city of Naples is only about 20 km away from the volcano.
Why is Taal Volcano a complex volcano?
Taal is defined as a “complex volcano” – it doesn’t have just one main vent or cone but several eruption points that have changed over time. Volcano Island alone has 47 craters and 4 maars – volcanic craters that form when hot magma comes into contact with shallow ground water, producing a violent steam explosion.
How dangerous is Taal Volcano?
Taal has had some of the country’s largest and deadliest eruptions: At least 6 eruptions during the recorded history of Taal since 1572 claimed fatalities, mostly from powerful pyroclastic flows, as well as tsunamis produced in the crater lake. …
How long is Taal volcano inactive?
Although it is classified as an active volcano, it hasn’t erupted in 43 years or since 1977. The volcano consists of multiple stratovolcanoes and craters. Since 1572, it has recorded 34 eruptions.
What are the ten most active volcanoes in the Philippines?
Top 10 Active Volcanoes in the Philippines
- 1.) Mount Mayon – Albay.
- 2.) Taal Volcano – Batangas.
- 3.) Mount Kanlaon – Negros Oriental.
- 4.) Mount Bulusan – Sorsogon.
- 5.) Mount Makaturing – Lanao del Sur.
- 6. – a) Musuan Volcano – Bukidnon.
- b) Mount Ragang – Lanao del Sur.
- 7. – a) Didicas Volcano – Cagayan.