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Eshaaan

Sep 03

The characteristics of volcanoes

in Eshaaan

EMS-Managing natural hazards, page no 146

What are volcanoes:

A volcano is a landform, a mountain, where molten rocks erupt through the surface of the planet. The volcano mountain opens downwards to a pool of molten rocks underneath the surface of the earth. Pressure builds up in the earth's crust and this is the reason why eruptions occur.

The characteristics of volcanoes. There are two types of volcanic activity:

Intrusive, when magma cools underground to form igneous rocks.
Extrusive, when magma flows out onto the Earth's surface as lava.

THE END

6 comments

Comments (6)

Ayana Ashok

Sep 05

which is the largest volcano ?

Eshaaan

Sep 06

Replying to

the Mauna Loa.

indu marath

Sep 04

How can scientists predict volcanic eruptions?
How do volcanic eruptions affect human populations?
What are some famous historical volcanic eruptions?
How do volcanoes contribute to the formation of new land?
What are the primary hazards associated with volcanic eruptions?

Eshaaan

Sep 06

Replying to

Seismic and Global Positioning System (GPS) stations are positioned to detect and locate subtle earthquakes and ground movements that may signal an awakening volcano.

2. People can be exposed to harmful volcanic gases by breathing them in or through contact with the skin and eyes. The health effects range from mild to serious, with occasional deadly exposures.

3. Mount Vesuvius is one of the most dangerous volcanoes in the world, famous for its eruption in 79 AD which buried the Ancient Roman cities of Pompeii and Herculaneum alive.

4. Eruptions of lava, ash, volcanic bombs, blocks, and cinders form new land on oceanic islands, and build towering and inspiring snow-covered peaks.

5. Several hazards may affect the area around the volcano, such as lava flows, pyroclastic flows, lahars, jökulhlaups and landslides or debris avalanches.

Aryan

Sep 04

which was the first volcano on earth

Eshaaan

Sep 04

Replying to

The oldest known lava flows that are still in existence are from a volcano near Inukjuak, Canada. These flows date back about 3.825 billion years. The oldest recorded volcanic eruption is believed to be in a cave drawing in Chauvet, France, which may be as much as 40,000 years old.