A volcano is a vent or fissure 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. [1]

Mar 26, 2026 · Volcano, vent in the crust of Earth or another planet or satellite, from which issue eruptions of molten rock, hot rock fragments, and hot gases. The term volcano can also refer to the …

Volcanoes are openings, or vents where lava, tephra (small rocks), and steam erupt onto the Earth's surface. Volcanic eruptions can last days, months, or even years.

Nov 18, 2025 · Volcanic processes consist of all natural volcano-related activity that happens on volcanic landforms. Volcanic eruptions range from effusive emissions of lava flows to highly …

Jul 10, 2025 · Volcanoes are Earth’s geologic architects. They’ve created more than 80 percent of our planet’s surface, laying the foundation that has allowed life to thrive. Their explosive force crafts...

The meaning of VOLCANIC is of, relating to, or produced by a volcano. How to use volcanic in a sentence.

Articles, facts, information and photos for volcanoes and volcanic activity. | Geology.com

Informational website about NOAA's Volcanic Ash Advisory Centers and their monitoring of volcanic ash across significant parts of the world.

Apr 22, 2024 · Know how to prepare for and protect yourself during and after volcanic eruptions.

Volcanic "bombs" are chunks of semimolten lava that fly out of a volcano and solidify as they land. They're often flung miles from the volcanic crater.