Volcanoes and Volcanic Eruptions

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.

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

Solar System Volcanoes occur on Earth and moons of Jupiter, Saturn and Neptune.

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

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

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

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

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.

Gifts That Rock - What are the most popular gift items in the Geology.com store?

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

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

Pele's Hair and Pele's Tears are two unusual types of lava found at Kilauea and Mauna Loa.

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

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.

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.

Cinder Cones are the smallest, simplest, and most common type of 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.

Spatter Cones are small, steep, volcanic cones built of welded basaltic lava.

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

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

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

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

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

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

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

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

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

Igneous and Volcanic Features an introduction to how these rocks occur below and above ground.

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

Where Are the Canary Islands? Off the northwest coast of Africa, 60 miles west of Morocco.

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

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

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

Kilauea Eruption - photos of the 2018 eruption in the East Rift Zone of Kilauea Volcano.

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

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

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

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

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

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