
Volcano - Wikipedia
The most common perception of a volcano is of a conical mountain, spewing lava and poisonous gases from a crater at its summit; however, this describes just one of the many types of …
Volcano | Definition, Types, & Facts | Britannica
Jan 7, 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 …
About Volcanoes | U.S. Geological Survey - USGS.gov
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 …
Global Volcanism Program | Current Eruptions
Jul 7, 2018 · There are 45 volcanoes with continuing eruptions as of the Stop Dates provided, and as reported through 30 December 2025. Although detailed statistics are not kept on daily …
Hawaiʻi Volcanoes National Park (U.S. National Park Service)
Dec 8, 2025 · Hawai‘i Volcanoes National Park protects some of the most unique geological, biological, and cherished cultural landscapes in the world. Extending from sea level to 13,680 …
Volcanoes - National Geographic Society
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.
Volcano facts and information | National Geographic
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...
Volcanoes: Types, Formation and Eruption Styles - Geology Science
Mar 11, 2019 · Volcanoes are geological formations that result from the accumulation of molten rock, ash, and gases beneath the Earth’s surface. These materials are expelled through …
Volcanoes and Volcanic Eruptions - Facts and Information
What is a Volcano? A volcano is a vent in Earth's surface where magma, gas, and ash escape. The name is also used for cones of erupted material at the vent. Volcanoes are found on many …
Volcanoes | Today's latest from Al Jazeera
Nov 20, 2025 · Stay on top of Volcanoes latest developments on the ground with Al Jazeera’s fact-based news, exclusive video footage, photos and updated maps.