A new project deploying 50 highly sensitive measuring tools on the floor of the Atlantic Ocean aims to fix the gap in scientists’ understanding of movements deep within the Earth. The seismometers, which detect vibrations due to seismic waves, will be placed across a region encompassing the Canary Islands and the archipelagos of the Azores and Madeira. They will continuously record Earth’s ground motions and what researchers call the pulse of the planet over the course of a year. The project led by UCL – called UPFLOW (UPward mantle FLOW from novel seismic observations) – aims to better understand big upwellings of material pushing up from Earth’s mantle.