Gas Hydrate Pingo (IMAGE) UiT The Arctic University of Norway Caption 500m wide and 10m high, the methane domes on the Arctic Ocean floor are containing huge amounts of methane. Illustration: Pavel Serov/CAGE Credit Pavel Serov/CAGE Usage Restrictions Attribution License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.