|Types Of Eruptions
Types of Volcanic Eruptions A description of the most common eruption types.
Pavlof Volcano is one of the most active volcanoes in North America and a threat to air traffic.
||St. Helens - 30 Years
Mount St. Helens - 30 Years Two USGS videos review the eruption and its impact.
Mount Rainier A dangerous volcano with a history of deadly lahars and pyroclastic flows.
Yellowstone Supervolcano Three USGS videos explain the history and eruptive activity.
Mount Vesuvius Geology, history, maps, facts and more about Vesuvius Volcano.
Volcanic Explosivity Rating volcanic eruptions based upon the volume of tephra ejected.
The Deepest Volcano Erupting 4000 feet below the surface of the Pacific.
Mount Etna The most active volcano in Europe, continues an eruption that started in 2001.
Volcanic Hazards Lava, pyroclastic density currents, lahars, gases and more.
||Hawaiian Hot Spot
How did the Hawaiian Islands Form? The power of a moving plate over a stationary hot spot.
Blue Flaming Sulfur Flows and the largest highly acidic lake in the world at Kawah Ijen Volcano.
Olympus Mons The largest volcano in the solar system is on Mars.
Stromboli Volcano Geology, history, maps, plate tectonics and more.
Largest Volcano - That title is shared by Tamu Massif, Mauna Kea and Ojos del Salado.
Volcanic Ash Learn about volcanic ash, volcanic dust and their impacts.
Igneous Rocks Descriptions and photos of common igneous rocks.
||Santa Maria Volcano
Santa Maria A volcano in Guatemala. Produced one of the largest eruptions of the 1900s.
Calderas are large volcanic craters formed by some of Earth\'s largest eruptions.
Chaiten Volcano Geology, history and facts about this explosive volcano.
|Great Rift Valley
The East Africa Rift System Volcanics and tectonics of this active rift system.
Teaching Plate Tectonics Students enjoy learning with easy-to-draw illustrations.
The most powerful eruption of the 20th century was blamed on the wrong volcano.
Arenal Volcano Geology, history, hazards, plate tectonics and more.
Mount Cleveland is an active volcano in the Aleutian Islands and a threat to air traffic.
Spectacular Eruption Photos A collection of volcanic eruption photos by USGS, NASA, NOAA.
Redoubt Volcano Lightning Photographs of lightning in the Redoubt Volcano ash cloud.
Galeras Volcano The most active volcano in Colombia. Article by Jessica Ball.
Helenite is a man-made glass produced by fusing ash from the 1980 Mount St. Helens eruption.
||CO2 Rich Lavas
Carbonatite Lava Flows These carbon dioxide rich lavas are as fluid as motor oil.
Redoubt Facts, history, geology, hazards and plate tectonics of this Alaskan volcano.
Solar System Volcanoes Earth is not the only location of volcanic activity.
Dallol Volcano is one of the strangest landscapes on earth - at 269 feet below sea level.
||What is a Maar?
What is a Maar? The second most common volcanic landscape feature on Earth.
||Volcanoes on Venus?
Volcanoes on Venus? The surface of Venus is covered by lava flows and shield volcanoes.
||Lunar Rift System
Lunar Rift System? Gravity maps revise the geologic history of the near side of the Moon.
Tao-Rusyr Caldera was the site of a massive volcanic eruption about 9000 years ago.