Many of the biggest threats that live in the ocean can’t be seen from the surface. Dr Izzy Yeo joins the podcast and covers some of the biggest marine geohazards, including underwater volcanoes. She also covers the devastating local and global impacts of the Hunga Tonga–Hunga Haʻapai volcanic eruption, which was the most explosive volcanic eruption of the 21st century. Learn more about the work of our Ocean BioGeosciences team here - https://noc.ac.uk/science/research-areas/ocean-biogeosciences Follow us on social media to keep up to date with new episode releases and latest news - https://linktr.ee/nocnews