The most common perception of a volcano is of a conical mountain, spewing lava and poisonous gases from a crater at its summit; however, this describes just one of the many types of volcano. The …

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 …

USGS scientists monitor over 160 active and potentially active volcanoes in the United States. Some of these are erupting now and others could erupt at some point in the future. Most of these volcanoes …

3 days ago · AP journalists accompanied a team of scientists on an expedition to learn what lies within one of the world's most active volcanoes.

Apr 17, 2023 · Hawaii Volcanoes National Park contains Kilauea, the most active volcano in the United States. Yellowstone National Park is the site of some of the largest volcanic eruptions known to have …

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...

Jun 16, 2025 · What is a Volcano? A volcano is, fundamentally, a geological vent or fissure in the Earth’s crust (or the surface of another planet or moon) through which molten rock, hot gases, ash, and …

May 21, 2025 · A volcano is an opening in a planet or moon’s crust through which molten rock, hot gases, and other materials erupt. Volcanoes often form a hill or mountain as layers of rock and ash …

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 worldwide that …

Concise daily volcanic activity summaries are published Monday through Friday and describe volcanic activity that has occurred and been reported by volcano observatories or other authoritative agencies …