Vents that issue volcanic material (including lava and ash) and gases (mainly steam and magmatic gases) can develop anywhere on the landform and may give rise to smaller cones such as Puʻu ʻŌʻō …

Jan 8, 2026 · Strictly speaking, the term volcano means the vent from which magma and other substances erupt to the surface, but it can also refer to the landform created by the accumulation of …

Informational website about NOAA's Volcanic Ash Advisory Centers and their monitoring of volcanic ash across significant parts of the world.

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.

A volcanic eruption is the expulsion of gases, rock fragments, and/or molten lava from within the Earth through a vent onto the Earth’s surface or into the atmosphere.

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

Jul 10, 2025 · 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...

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.

The Global Volcanism Program documents, disseminates, and archives eruption information to better understand worldwide volcanic activity. Reports are produced on daily, weekly, and multi-month …