Augustine Volcano (Alaska) during its eruptive phase on January 24, 2006 A volcano is commonly defined as a vent or fissure in the crust of a planetary-mass object, such as Earth, that allows hot …

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 …

Get more information about volcanoes from National Geographic.

Feb 25, 2025 · Discover interesting facts about volcanoes, including why and where they form and history's deadliest eruption.

Principal Types of Volcanoes Geologists generally group volcanoes into four main kinds--cinder cones, composite volcanoes, shield volcanoes, and lava domes. Cinder cones C inder cones are the …

The Global Volcanism Program (GVP) seeks better understanding of all volcanoes through documenting their eruptions during the past 12,000 years.

3 days ago · Interactive Map of Active Volcanoes and recent Earthquakes world-wide

Jan 21, 2025 · Volcanoes have long been a source of myths and legens. To ancient cultures, volcanoes’ power could only be explained as acts of gods or demigods. We now know that volcanoes are in fact …

The drop down items below contain 6 descriptions of volcano types based on morphology. They were originally written for an "ask-a-volcanologist" answer. Read on for a bit more information and history …

3 days ago · There are about 170 potentially active volcanoes in the U.S. The mission of the USGS Volcano Hazards Program is to enhance public safety and minimize social and economic disruption …