The Arctic seafloor is cracking open, and scientists say underwater volcanoes are now stirring back to life in one of the most remote places on Earth. Researchers monitoring the region detected sudden fractures ripping through the ocean bed, an event experts haven’t witnessed at this scale before.

The Arctic is undergoing changes that scientists are still working to understand. In the East Siberian Sea, researchers are monitoring possible underwater volcanic activity near remote Bennett Island. Satellite imagery has detected plumes over the ocean that appear similar to volcanic emissions, and the seafloor in the area has shifted by roughly 3 to 40 feet over nine years. These signs suggest t…