Signs of a supervolcano lurking under Alaska’s Aleutian islands

A group of volcanoes in the Aleutian Islands may form a massive supervolcano similar to Yellowstone. A study by Earth scientists, led by John Power, suggests that six volcanoes in the Islands of the Four Mountains are on the edges of a large caldera. A caldera is a depression formed when a magma reservoir empties and the ground collapses. Evidence, including undersea ridges and rock samples, indicates a past cataclysmic eruption may have caused this formation.

What is the potential size of the supervolcano in the Aleutian Islands compared to?

• Mount Vesuvius

• Yellowstone caldera

• Mount St. Helens

• Krakatoa

Who led the team of Earth scientists that presented the study to the American Geophysics Union?

• Marie Curie

• Isaac Newton

• Albert Einstein

• John Power

What is the name of the island group where the six volcanoes are located?

• Canary Islands

• Galapagos Islands

• Islands of the Four Mountains

• Hawaiian Islands

What geological feature is left behind after a massive reservoir of magma empties?

• A valley

• A mountain

• A caldera

• A plateau

What evidence suggests a past cataclysmic volcanic eruption in the Aleutian Islands?

• Tsunamis

• Undersea ridges and rock samples

• Lava flows

• Earthquakes