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 …

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 …

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.

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 …

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

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.

Each type of volcano has a characteristic size and form, eruption type (s) and style, eruption period/longevity, rock type (s), and sets of volcanic features. There is an interplay between …

Volcano Calendar 2019 We're proud to present our 2019 volcano calendar: 13 different and attractive images of volcanoes, volcanic landscapes and phenomena taken during volcano …