Sep 29, 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 …

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...

Apr 22, 2024 · Volcanoes spew hot, dangerous gases, ash, lava, and rock that are powerfully destructive. People have died from volcanic blasts. Natural threats caused by volcanic …

Overview of our website: 1) Info about all active volcanoes in the world; 2) Volcano photos; 3) Earthquake information; 4) Tours and expeditions to active volcanoes, walking and study …

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

Feb 25, 2025 · Volcanoes are cracks in Earth's crust that allow molten rock and hot gases to escape. According to the U.S. Geological Survey (USGS), there are about 1,350 volcanoes …

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 …

Jun 13, 2025 · It is within the mantle, especially in its upper regions, that most volcanic activity is born. Here, temperature and pressure conspire to partially melt rock, forming magma. This …