Volcanic Explosivity: Rating volcanic eruptions based upon the volume of tephra ejected.
Vesuvius: Geology, history, maps, facts and more about Vesuvius Volcano.
Chaitén: Geology, history and facts by Jessica Ball.
||St. Helens - 30 Years
Mount St. Helens - 30 Years: Two USGS videos review the eruption and its impact.
Igneous Rocks Descriptions and photos of common rocks.
Yellowstone Supervolcano: Three USGS videos explain the history and eruptive activity.
Mount Etna the most active volcano in Europe, continues an eruption that started in 2001.
The most powerful eruption of the 20th century was blamed on the wrong volcano.
|Types Of Eruptions
Types of Volcanic Eruptions: Article & photos by Jessica Ball.
Volcanic Hazards: Learn about the many dangers of volcanoes.
Calderas are large volcanic craters formed by some of Earth\'s largest eruptions.
Mount Rainier: A dangerous volcano with a history of deadly lahars and pyroclastic flows.
|How Kilauea Works
How Does Kilauea Work? Discover the underground plumbing system of Kilauea.
||Great Rift Valley
The East Africa Rift System: Learn about the East Africa Rift.
Deepest Volcano Erupting 4000 feet below the Pacific.
Galeras Volcano: Colombia\'s most active volcano. Article by Jessica Ball.
|Hawaiian Hot Spot
How did the Hawaiian Islands Form? The power of a moving plate over a stationary hot spot.
||What is a Maar?
What is a Maar? The second most common volcanic landscape feature on Earth.
Teaching Plate Tectonics with Easy-to-Draw Illustrations
Dallol Volcano: is one of the strangest landscapes on earth - at 269 feet below sea level.
USGS Photos: Kilauea Eruption! Photos of lava flows, ashfall and other eruption effects.
Solar System Volcanoes: On other planets & moons.
Olympus Mons: The largest solar system volcano.
Mount Cleveland is an active volcano in the Aleutian Islands and a threat to air traffic.
Stromboli Volcano Geology, history, facts and more by Jessica Ball.
Tao-Rusyr Caldera was the site of a massive volcanic eruption about 9000 years ago.
Arenal Volcano: Geology, history & hazards. Jessica Ball.
||Santa Maria Volcano
Santa Maria: A volcano in Guatemala. Produced one of the largest eruptions of the 1900\'s.
Redoubt: Facts, history, geology, and hazards by Jessica Ball.
||CO2 Rich Lavas
Carbonatite Lava Flows: CO2 - rich lavas flow like motor oil.
Volcanic Ash: Learn about volcanic ash and volcanic dust.
Tamu Massif might be the largest volcano but Mauna Kea and Ojos del Salado are rivals.
Spectacular Eruption Photos: A collection of volcanic eruption photos by USGS, NASA, NOAA.
Pavlof Volcano is one of the most active volcanoes in North America and a threat to air traffic.
Lö\'ihi Seamount is a submarine volcano that could become an island in the Hawaiian Chain.
||Volcanoes on Venus
Volcanoes on Venus: the planet\'s surface is covered by lava flows and shield volcanoes.
Volcano in the Great Valley: An eroded volcanic feature that is a surprise in the Great Valley.
Redoubt Volcano Lightning: Photographs of lightning in the Redoubt Volcano ash cloud.