Topic: Geographical features and their location- changes in critical geographical features. What is it? It is the world’s largest deep ocean volcanic eruption happened in New Zealand. It was recently confirmed by the researchers. About Havre:Named as Havre, the deep ocean volcanic eruption was first discovered in 2002. A solidified volcanic rock known as pumice raft — 400 square kilometres in size — found floating in the ocean near New Zealand in 2012 showed that underwater eruption had occurred. The eruption involved 14 aligned vents causing a “massive rupture”