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Volcanoes and Volcanic Eruptions


Volcanic Explosivity
Volcanic Explosivity
Volcanic Explosivity Rating volcanic eruptions based upon the volume of tephra ejected.
Mount Cleveland
Mount Cleveland
Mount Cleveland is an active volcano in the Aleutian Islands and a threat to air traffic.
Mount Etna
Mount Etna
Mount Etna The most active volcano in Europe, continues an eruption that started in 2001.
Mount Vesuvius
Mount Vesuvius
Mount Vesuvius Geology, history, maps, facts and more about Vesuvius Volcano.

Dangerous Volcano
Mount Rainier
Mount Rainier A dangerous volcano with a history of deadly lahars and pyroclastic flows.
Yellowstone Caldera
Yellowstone Caldera
Yellowstone Supervolcano Three USGS videos explain the history and eruptive activity.
Geology Tools
Geology Tools
Geology Tools - Hammers, field bags, hand lenses, maps, hardness picks, gold pans.
Deepest Volcano
Deepest Volcano
The Deepest Volcano Erupting 4000 feet below the surface of the Pacific.

St. Helens - 30 Years
Mount St. Helens - 30 Years
Mount St. Helens - 30 Years Two USGS videos review the eruption and its impact.
Largest Volcano
Largest Volcanoes
Largest Volcano - That title is shared by Tamu Massif, Mauna Kea and Ojos del Salado.
Hawaiian Hot Spot
Hawaiian Hot Spot
How did the Hawaiian Islands Form? The power of a moving plate over a stationary hot spot.
Volcanic Hazards
Volcanic Hazards
Volcanic Hazards Lava, pyroclastic density currents, lahars, gases and more.

Blue Flames
blue flames
Blue Flames and the largest highly acidic lake in the world at Kawah Ijen Volcano.
Stromboli Volcano
Stromboli Volcano
Stromboli Volcano Geology, history, maps, plate tectonics and more.
Igneous Rocks
Igneous Rocks
Igneous Rocks Descriptions and photos of common igneous rocks.
Santa Maria Volcano
Santa Maria Volcano
Santa Maria A volcano in Guatemala. Produced one of the largest eruptions of the 1900s.
Types Of Eruptions
Types Of Eruptions
Types of Volcanic Eruptions A description of the most common eruption types.
Teaching Tectonics
Teaching Tectonics
Teaching Plate Tectonics Students enjoy learning with easy-to-draw illustrations.
Calderas
Calderas
Calderas are large volcanic craters formed by some of Earth\'s largest eruptions.
Volcanic Ash
Volcanic Ash
Volcanic Ash Learn about volcanic ash, volcanic dust and their impacts.
Wrong Volcano?
Novarupta
The most powerful eruption of the 20th century was blamed on the wrong volcano.
Great Rift Valley
Great Rift Valley
The East Africa Rift System Volcanics and tectonics of this active rift system.
Eruption Photos
Eruption Photos
Spectacular Eruption Photos A collection of volcanic eruption photos by USGS, NASA, NOAA.
Chaiten Volcano
Chaiten Volcano
Chaiten Volcano Geology, history and facts about this explosive volcano.

Helenite
Helenite
Helenite is a man-made glass produced by fusing ash from the 1980 Mount St. Helens eruption.
CO2 Rich Lavas
Carbonatite Lava Flows:
Carbonatite Lava Flows These carbon dioxide rich lavas are as fluid as motor oil.
Tao-Rusyr Caldera
Tao-Rusyr Caldera
Tao-Rusyr Caldera was the site of a massive volcanic eruption about 9000 years ago.
Mars Volcano
Olympus Mons
Olympus Mons The largest volcano in the solar system is on Mars.
Dallol Volcano
Dallol Volcano
Dallol Volcano is one of the strangest landscapes on earth - at 269 feet below sea level.
Pavlof Volcano
Pavlof Volcano
Pavlof Volcano - an active North American volcano and a threat to air traffic.
Volcanic Lightning
Volcanic Lightning
Redoubt Volcano Lightning Photographs of lightning in the Redoubt Volcano ash cloud.
Solar System
Solar System Volcanoes
Solar System Volcanoes Earth is not the only location of volcanic activity.
Lunar Rift System
lunar rift system
Lunar Rift System? Gravity maps revise the geologic history of the near side of the Moon.
What is a Maar?
What is a Maar?
What is a Maar? The second most common volcanic landscape feature on Earth.
Volcanoes on Venus?
Volcanoes on Venus
Volcanoes on Venus? The surface of Venus is covered by lava flows and shield volcanoes.
Arenal Volcano
Arenal Volcano
Arenal Volcano Geology, history, hazards, plate tectonics and more.
Redoubt Volcano
Redoubt Volcano
Redoubt Facts, history, geology, hazards and plate tectonics of this Alaskan volcano.
Galeras Volcano
Galeras Volcano
Galeras Volcano The most active volcano in Colombia. Article by Jessica Ball.