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 below 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 …

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 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 …

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 …

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 …

What is a Volcano? A volcano is a vent in Earth's surface where magma, gas, and ash escape. The name is also used for cones of erupted material at the vent. Volcanoes are found on many planets …

1 day ago · For five years, the group from Mexico’s National Autonomous University has climbed the volcano with kilos of equipment, risked data loss due to bad weather or a volcanic explosion and …