On Earth, volcanoes are most often found where tectonic plates are diverging or converging, and because most of Earth's plate boundaries are underwater, most volcanoes are found underwater.

Jan 8, 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 landform …

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. What is a volcano? Redoubt …

Apr 17, 2023 · Volcanoes both build and destroy landscapes. Eruptions of lava, ash, volcanic bombs, blocks, and cinders form new land on oceanic islands, and build towering and inspiring snow …

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

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...

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 …

Learn about volcanic eruptions and the science of volcanoes. Get details on Smithsonian research into what volcanoes reveal about Earth’s interior.

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

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.