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.

Nov 26, 2025 · 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 …

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.

Sep 19, 2024 · Volcanic processes consist of all natural volcano-related activity that happens on volcanic landforms. Volcanic eruptions range from effusive emissions of lava flows to highly …

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...

2 days ago · Magma under pressure Scientists are still unraveling the complex ways melting ice affects volcanic activity, but there is general agreement over how the relationship may unfold.

Dec 19, 2025 · A dormant volcano in Ethiopia erupted after 10,000 years of silence. This event shows how the world's little-known volcanoes pose the greatest threat.

2 days ago · Photos: The Year in Volcanic Activity Scenes from the wide variety of volcanic activity on Earth over the past year Updated at 3:09 p.m. ET on December 29, 2025 By Alan Taylor December …

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