Feb 25, 2025 · The world's largest volcano: Mauna Loa, which rises 30,000 feet (9,000 meters) above the seafloor. Number of active volcanoes in the U.S.: 165.

Jun 10, 2025 · The U.S. Geological Survey defines a volcano as a vent in Earth's surface, either on land or on the seafloor, from which molten rock called magma, as well as ash and gases, …

Jan 9, 2025 · The closer a volcano is to erupting, the greener the trees around it look from space Watch mesmerizing 1,000-foot-tall lava fountains: Kilauea volcano erupting in ways not seen …

Jun 2, 2025 · Scientists observing the volcano said that the latest eruptive activity likely started after a collapse of material in Mount Etna's South-East Crater, where the "explosive activity" …

Mar 18, 2025 · In 1992, volcanic tremor started about three weeks before Mount Spurr erupted. Another nearby volcano that erupted in 2009, Mount Readout, showed volcanic tremor for two …

Jun 10, 2023 · The volcano erupted catastrophically in 1815 and is still considered active. (Image credit: Mike Lyvers/Getty) The explosion of Mount Tambora is the l argest ever recorded by …

Oct 4, 2024 · Mount Adams is the largest active volcano in Washington state. (Image credit: Google Earth) It last erupted at some point between 3,800 and 7,600 years ago, according to …

Jan 2, 2025 · The volcano, known as Axial, is a seamount 300 miles (480 kilometers) west of Cannon Beach, Oregon. The Axial seamount erupts regularly — it rumbled to life in 1998, …

Feb 29, 2024 · Mexico's most dangerous active volcano has erupted 13 times in the past day, hurling columns of ash and smoke into the sky. The volcanic activity is disrupting flights in the …

Dec 30, 2024 · A volcano that hasn't erupted in the Holocene is considered extinct. This geologic-timescale-based distinction is somewhat arbitrary, Ben Kennedy , a volcanologist at the …