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 …

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 …

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...

Mt. Etna, Sicily (2002-03) This website is an educational resource that describes the science behind volcanoes and volcanic processes. The site is sponsored by NASA under the auspices …

Apr 22, 2024 · Know how to prepare for and protect yourself during and after volcanic eruptions.

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

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 …

Any channel through the crust that allows the magma to flow is called a volcano. A volcano has a chamber of hot magma on one end and an opening to the air (or ocean) on the other. …

Jun 17, 2025 · Most volcanoes form at the boundaries of Earth’s tectonic plates. These plates are huge slabs of Earth’s crust and upper mantle, which fit together like pieces of a puzzle. These …