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 …

Sep 29, 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 …

Apr 22, 2024 · Volcanoes spew hot, dangerous gases, ash, lava, and rock that are powerfully destructive. People have died from volcanic blasts. Natural threats caused by volcanic …

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.

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 · Volcanoes are cracks in Earth's crust that allow molten rock and hot gases to escape. According to the U.S. Geological Survey (USGS), there are about 1,350 volcanoes …

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

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

Aug 5, 2022 · The Volcanic Explosivity Index (VEI) is a scale that describes the size of explosive volcanic eruptions based on magnitude and intensity. The numerical scale (from 0 to 8) is a …

Oct 2, 2025 · A volcanic eruption is an eruption of molten rock, hot rock fragments, and hot gases through a volcano, which is a vent in a planet’s or satellite’s crust. Volcanic eruptions can …