Secrets of largest volcanic eruption in ocean uncovered in world’s first study

SYDNEY: A University of Tasmania-led study has unlocked the secrets of the largest ever volcanic eruption in the ocean yesterday, after successfully mapping the remote location with submersible vehicles, China’s Xinhua news agency reported.

Located 1,000 kilometres off the North Island of New Zealand, the Havre Volcano was first discovered in 2002 and in 2012, it drew the eye of scientists when over 400 square kilometres of solidified volcanic rock, known as pumice raft, was detected by satellite.

“When this rock was produced by the volcano, it rose through the water column onto the sea surfaced and then it was dispersed by wind and sea currents,” University of Tasmania volcanologist and lead author of the study, Dr Rebecca Carey, told Xinhua.

“We knew it was a large scale eruption, approximately equivalent to the biggest eruption we’ve seen on land in the 20th Century.”

With a team of researchers and international collaborators, scientists sent two submersible vehicles to the remote location.

“We used an autonomous submarine to make high resolution topographic maps of the sea floor,” Carey said.

“We did about 12 different surveys for eight to 12 hours each and those maps are so high resolution that we were then able to use a remotely operated vehicle which is tethered to the ship, to actually go down and make observation of the eruption and also bring back samples.”

With more than 80 per cent of the world’s volcanoes located underwater, scientists like Carey believe it’s vital to learn more about them.