volcano

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Mount St. Helens volcano

Magma streaming down a volcano.

Mount Fuji, Japan.

volcanism and plate tectonics

volcanoes and thermal fields

What it's like to visit an active volcano

Mount St. Helens eruption.

Types of volcanic eruptions explained

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volcano summary

volcano: Related Content

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Last Updated: Jan 08, 2026

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Volcano guides at Mount Etna are protesting over new safety rules • Jan. 8, 2026, 3:55 AM ET (AP)

Photos and Videos

Mount St. Helens volcano

Mount Fuji, Japan.

volcanism and plate tectonics

volcanoes and thermal fields

Mount St. Helens eruption.

major types of volcanic eruptions

Magma streaming down a volcano.

What it's like to visit an active volcano

Types of volcanic eruptions explained

Behold magma eruptions from Earth's core ushering lava rivers down Kilauea in Hawaii

How and where does magma form on Earth?

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Topics

rift volcano volcanic neck lava tube fissure vent volcanic field volcanic chain volcanic arc crater row submarine volcano subduction volcano cave tectonic basins and rift valleys meteorite crater continental shelf fault aseismic ridge karst magma geyser volcanic dome

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Key People

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Sir William Hamilton

British diplomat

Day, Arthur L.

Arthur L. Day

American geophysicist

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Walter Herman Bucher

American geologist

Hawaiian volcanic crater, Hawaii

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Taj Mahal, Agra, India. UNESCO World Heritage Site (minarets; Muslim, architecture; Islamic architecture; marble; mausoleum)

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