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volcano
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Mount St. Helens volcano
How volcanoes work, explained by a volcanologist
Mount Fuji, Japan. volcanism and plate tectonics volcanoes and thermal fields
What it's like to visit an active volcano
seismic sensor pahoehoe Mount St. Helens eruption.
Types of volcanic eruptions explained
Behold magma eruptions from Earth's core ushering lava rivers down Kilauea in Hawaii
Clark Air Base Mount Pinatubo
How and where does magma form on Earth?
major types of volcanic eruptions Mount Saint Helens
Discover the ancient Roman city of Pompeii, buried in volcanic ash when Mount Vesuvius erupted
Mount Pinatubo Kilauea volcano
Study how magma erupts as lava and turns into pumice or hardens to form a shield volcano
Krakatoa (Krakatau) volcano volcanic landforms Momotombo Volcano and Momotombito Island, Nicaragua Ol Doinyo Lengai volcano Lō‘ihi Seamount Taal volcano
Learn about the volcanic collapse of Mount Mazama and Crater Lake caldera formation in Cascade Range
Cerro Negro volcano
View original footage of Paricutín's nine-year volcanic eruption and the devastation experienced by surrounding communities
lava dome
The stages of lava: From eruption to cooling
Behold near-boiling water spurting from geysers and hot springs in Wyoming's Yellowstone National Park
geyser and hot spring Old Faithful Ring of Fire earthquake epicentres
View molten sulfur and volcanic gases erupt through an undersea vent near the Mariana Islands
Learn through an animation about the formation of the volcanic island chains like Hawaii and Samoa
geothermal energy resources in the United States Kilauea volcano Kraternaya Bay The Martian volcano Arsia Mons, the southernmost of the line of three volcanoes on Tharsis Olympus Mons, the largest volcano on Mars. The volcano is about 600 km (370 miles) wide at its base and 27 km (17 miles) high. This mosaic combines images from the Viking spacecraft. Olympus Mons, Mars's tallest volcano, imaged by the Mars Global Surveyor spacecraft on April 25, 1998. North is to the left. Water-ice clouds are visible to the east (top) against the bordering escarpment and above the plains beyond. The central caldera, about 85 km (53 miles) across, comprises several overlapping collapse craters. Olympus Mons on Mars Tharsis region, northern hemisphere of Mars. Olympus Mons is visible on the left; Ascraeus Mons is on the right. High clouds are also visible, especially in the far northern regions (top). This image was taken by the Mars Global Surveyor on June 1, 1998. Luzon, Philippines Mount Bromo Mount Merapi Mount Pinatubo Figure 2: The north face of Mt. St. Helens in June 1970. The summit elevation was 2,950 metres. volcanic eruption on Io Réunion: volcano Tungurahua volcano, Ecuador Venus: Idunn Mons porphyry copper deposit earthquake zones and volcanoes Volcanoes and glaciers of Iceland
Discover how the volcanic island of Surtsey formed for ash and lava erupting from the seafloor near Iceland
Learn about Io, Jupiter's moon with the most active volcanoes in the solar system
Solving the mystery of Selinus's destruction
How tsunamis form from earthquakes, volcanoes, and landslides
Mount Tambora: 1815 eruption A volcano forms when magma beneath the Earth's crust forces its way to the surface. Alternating layers of solidified lava and pyroclastic materials (ash and cinders) build up the typical cone shape of a stratovolcano as they are ejected through the central vent during eruptions.
For Students
volcano summary
Quizzes
Taj Mahal, Agra, India. UNESCO World Heritage Site (minarets; Muslim, architecture; Islamic architecture; marble; mausoleum)
Wonders of the World Quiz
Hawaiian volcanic crater, Hawaii
Volcanoes Quiz

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News •

Satellite Image Captures US Volcano 'Ready to Rumble' • June 23, 2025, 6:23 AM ET (Newsweek)
Volcano erupts in Indonesia, grounding flights and forcing evacuations • June 19, 2025, 5:57 AM ET (NBC)
Sicily's Mount Etna erupts with columns of smoke and ash • June 2, 2025, 9:34 PM ET (AP)

Photos and Videos

Mount St. Helens volcano
Mount Fuji, Japan.
volcanism and plate tectonics
volcanoes and thermal fields
seismic sensor
pahoehoe
Mount St. Helens eruption.
Clark Air Base
Mount Pinatubo
major types of volcanic eruptions
How volcanoes work, explained by a volcanologist
What it's like to visit an active volcano
Types of volcanic eruptions explained
Behold magma eruptions from Earth's core ushering lava rivers down Kilauea in Hawaii
How and where does magma form on Earth?
See All Videos and Images →

Related Topics and References

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Dig Deeper: More Articles That Discuss This Topic

Key People

Sir William Hamilton
British diplomat
Day, Arthur L.
Arthur L. Day
American geophysicist
Walter Herman Bucher
American geologist

Related Quizzes

Hawaiian volcanic crater, Hawaii
Volcanoes Quiz
Taj Mahal, Agra, India. UNESCO World Heritage Site (minarets; Muslim, architecture; Islamic architecture; marble; mausoleum)
Wonders of the World Quiz
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