St. Helens - 30 Years

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

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

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

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

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

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

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

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

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

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

Spectacular Eruption Photos A collection of volcanic eruption photos by USGS, NASA, NOAA.
Lo'ihi Seamount

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

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

Kilauea Eruption - photos of the 2018 eruption in the East Rift Zone of Kilauea Volcano.
Volcanoes on Venus?

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

Pele*s Hair and Pele*s Tears are two unusual types of lava found at Kilauea and other volcanoes.
Lunar Rift System

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

Redoubt Facts, history, geology, hazards and plate tectonics of this Alaskan volcano.
Kick 'em Jenny

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

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