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