A volcano is 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 surface. [1]

May 18, 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 …

2 days ago · Which volcanoes are erupting? - List & map of active volcanoes erupting at present

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.

Oct 18, 2022 · The national parks protect active volcanic processes and the features left behind from past activity. Learn more about volcanoes.

2 days ago · America’s most dangerous volcano is bound to blow, scientists warn — and it could devastate surrounding towns in minutes

Volcano facts 1. Put simply, a volcano is an opening in the Earth’s surface. Usually found in a mountain, the opening allows gas, hot magma and ash to escape from beneath the Earth’s crust.

The Global Volcanism Program (GVP) seeks better understanding of all volcanoes through documenting their eruptions during the past 12,000 years.

Watch live volcanic eruption activity from Hawaii's Kilauea volcano. Real-time USGS monitoring, past eruption streams, and volcanic tour information.

Jul 10, 2025 · Fiery volcanoes have belched up molten rock, hot ash, and gas since Earth formed billions of years ago.