Volcanoes and Volcanic Eruptions

First-Ever Ashfall Advisory was issued in Hawaii by the National Weather Service.

Wall Map of Hawaii - large, laminated, shows topography and bathymetry in shaded relief.

The Next Hawaiian Island could be growing in the Pacific Ocean right now. Its name is Lo'ihi.

Blue Flames and the largest highly acidic lake in the world at Kawah Ijen Volcano.

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.

Yellowstone Supervolcano Three USGS videos explain the history and eruptive activity.

Mount St. Helens - 30 Years Two USGS videos review the eruption and its impact.

Mount Agung is an active and dangerous volcano on the island of Bali, Indonesia.

The Deepest Volcano Erupting 4000 feet below the surface of the Pacific.

Kick 'em Jenny is a submarine volcano and one of the most active on the Caribbean plate.

Mount Cleveland is an active volcano in the Aleutian Islands and a threat to air traffic.

Mount Rainier A dangerous volcano with a history of deadly lahars and pyroclastic flows.

Volcanic Hazards Lava, pyroclastic density currents, lahars, gases and more.

Largest Volcano - That title is shared by Tamu Massif, Mauna Kea and Ojos del Salado.

Stromboli Volcano Geology, history, maps, plate tectonics and more.

How did the Hawaiian Islands Form? The power of a moving plate over a stationary hot spot.

Igneous Rocks Descriptions and photos of common igneous rocks.

Volcanic Explosivity Rating volcanic eruptions based upon the volume of tephra ejected.

Types of Volcanic Eruptions A description of the most common eruption types.

Chaiten Volcano Geology, history and facts about this explosive volcano.

Teaching Plate Tectonics Students enjoy learning with easy-to-draw illustrations.

Volcanic Ash Learn about volcanic ash, volcanic dust and their impacts.

Santa Maria A volcano in Guatemala. Produced one of the largest eruptions of the 1900s.

Olympus Mons The largest volcano in the solar system is on Mars.

The most powerful eruption of the 20th century was blamed on the wrong volcano.

Calderas are large volcanic craters formed by some of Earth\'s largest eruptions.

Geology Tools - Hammers, field bags, hand lenses, maps, hardness picks, gold pans.

The East Africa Rift System Volcanics and tectonics of this active rift system.

Spectacular Eruption Photos A collection of volcanic eruption photos by USGS, NASA, NOAA.

Helenite is a man-made glass produced by fusing ash from the 1980 Mount St. Helens eruption.

Galeras Volcano The most active volcano in Colombia. Article by Jessica Ball.

Redoubt Facts, history, geology, hazards and plate tectonics of this Alaskan volcano.

Redoubt Volcano Lightning Photographs of lightning in the Redoubt Volcano ash cloud.

What is a Maar? The second most common volcanic landscape feature on Earth.

Dallol Volcano is one of the strangest landscapes on earth - at 269 feet below sea level.

Solar System Volcanoes Earth is not the only location of volcanic activity.

Pavlof Volcano - an active North American volcano and a threat to air traffic.

Tao-Rusyr Caldera was the site of a massive volcanic eruption about 9000 years ago.

Arenal Volcano Geology, history, hazards, plate tectonics and more.

Volcanoes on Venus? The surface of Venus is covered by lava flows and shield volcanoes.

Carbonatite Lava Flows These carbon dioxide rich lavas are as fluid as motor oil.

Lunar Rift System? Gravity maps revise the geologic history of the near side of the Moon.