Giant Undersea Volcanoes Found Off Antarctica

Mount Fuji-size peaks unexpected, scientists say.

All told a dozen previously unknown peaks were discovered beneath the waves—some up to 10,000 feet (3,000 meters) tall, according to the British Antarctic Survey.

The volcanoes were found near the U.K. territories of the South Georgia Islands and South Sandwich Islands (see map) during a monthlong mapping expedition, which used multibeam sonar to fill in a 370-mile (600-kilometer) by 90-mile (150-kilometer) gap in existing seabed maps.

"It was amazing finding them," said Phil Leat, a geologist volcanologist with the survey. "There were so many of these volcanoes we had no idea about."

(See pictures of

Create your free account to continue reading

No credit card required. Unlimited access to free content.
Or get a Premium Subscription to access the best of Nat Geo - just $19
SUBSCRIBE

Read This Next

AI can help you plan your next trip—if you know how to ask.
Did this mysterious human relative bury its dead?
This new birth control for cats doesn't require surgery

Go Further

Subscriber Exclusive Content

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history

See how NASA’s new Mars rover will explore the red planet

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history

See how NASA’s new Mars rover will explore the red planet

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history

See how NASA’s new Mars rover will explore the red planet