A volcano is commonly defined as 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 …

Molten rock below the surface of the Earth that rises in volcanic vents is known as magma, but after it erupts from a volcano it is called lava. Magma is made of molten rock, crystals, and dissolved …

Nov 26, 2025 · 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 …

Nov 25, 2025 · The volcano near Naples is shaking the ground in a way that scientists say it hasn't for centuries, posing risks for hundreds of thousands of people living in the 8-mile-wide crater left by past ...

Jul 5, 2023 · Volcanoes are both the vents where molten rock material and volcanic gases are erupted from within Earth’s interior, and the cones and mountains built up around those vents. But beyond …

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...

Feb 25, 2025 · From lava fountains to towering ash clouds, volcanoes produce some of the most dramatic geological events on the planet. Volcanoes are cracks in Earth's crust that allow molten …

May 21, 2025 · A volcano is an opening in a planet or moon’s crust through which molten rock and gases trapped under the surface erupt, often forming a hill or mountain.

A volcano is a location where molten rock flows out, or erupts, onto Earth’s surface as lava. Volcanic eruptions can happen on land or underwater. Some volcanic eruptions flow from mountains (such as …

Jun 16, 2025 · A volcano is, fundamentally, a geological vent or fissure in the Earth’s crust (or the surface of another planet or moon) through which molten rock, hot gases, ash, and debris erupt onto …