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  1. Volcano - Wikipedia

    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 …

  2. Volcano | Definition, Types, & Facts | Britannica

    3 days ago · 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 landform …

  3. About Volcanoes | U.S. Geological Survey - USGS.gov

    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.

  4. About Volcanoes - U.S. National Park Service

    Sep 19, 2024 · 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 …

  5. 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 planets …

  6. 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...

  7. Volcanoes - National Geographic Society

    May 21, 2025 · Volcanoes are classified as active, dormant, or extinct. Active volcanoes have a recent history of eruptions; they are likely to erupt again. Dormant volcanoes have not erupted for a very …

  8. Volcano facts and types of volcanoes | Live Science

    Feb 25, 2025 · 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.

  9. VOLCANIC Definition & Meaning - Merriam-Webster

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

  10. 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 activity, …