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 …

Nov 26, 2025 · 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 …

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.

Nov 11, 2025 · volcanism, any of various processes and phenomena associated with the surficial discharge of molten rock, pyroclastic fragments, or hot water and steam, including volcanoes, …

Nov 16, 2025 · News Which volcanoes are erupting now? What's erupting? List & map of currently active volcanoes. Updated: Nov 16, 2025 04:37 GMT - 1 day 22 hours ago refresh. Try our free app!

What Causes a Volcano to Erupt? Volcanic eruptions are caused by convection in Earth’s mantle and crust.

6 days ago · USGS Volcano Observatories release regular updates and notifications to communicate increases or decreases in volcanic activity and explain unusual or hazardous circumstances.

4 days ago · Explore the geological processes behind volcano formation and activity, why volcanoes matter, their hazards, resources, and major global examples.

Dec 9, 2025 · Volcanic activity reported here is preliminary and subject to change. Carefully reviewed, detailed narratives over longer time periods are published as reports of the Bulletin of the Global …