Submarine eruption at Havre volcano built a new volcanic cone

Submarine eruption at Havre volcano built a new volcanic cone

New Zealand scientists investigating an active Kermadec undersea volcano Havre discovered significant changes to the seafloor during its last eruption on July 19, 2012. The eruption was captured by a Nasa satellite, and a Royal New Zealand Air Force Orion patrol spotted the huge pumice area on their way back home from Samoa (read our earlier report)

Scientists, aboard Niwa research ship - Tangaroa (deepwater research vessel), used multibeam sonar to map the seamount and found evidence of a new volcanic cone, 240 m tall and reaching withing 1,100 m below sea level, built on the side of the large submarine caldera of Havre. Aside from new volcanic cone they also found one side of the caldera wall is bulging in towards the volcano's center, indicating where an eruption may occur in the future or it may lead to an undersea avalanche.

Niwa's volcanologist Dr Richard Wysoczanski, who is leading the 23-day expedition, said there had been volcanic activity every year for the past decade, but this was the largest by far.

"It is a substantial eruption. Had it occurred on land in New Zealand, it would have been a bit of a disaster."

The volcanic caldera, which is like Lake Taupo, known to produce large and violent eruptions, spewed up to 10 000 more material than the Mt Tongariro eruption on August 6, he said.

Register/become a supporter

Support us AD-FREE

Your support is crucial for our survival. It makes this project fully self-sustainable and keeps us independent and focused on the content we love to create and share. 

Monthly subscription

Subscription options

Yearly subscription

Subscription options

You'll receive your ad-free account for 20x faster browsing experience, clean interface without any distractions, ability to post comments without prior editorial check, all our desktop and mobile applications (current and upcoming) ad-free and with the full set of features available, a direct line of communication and much more. See all options.

Tags: havre, pumice

Comments

No comments yet. Why don't you post the first comment?

Post a comment

Your name: *

Your email address: *

Comment text: *

The image that appears on your comment is your Gravatar