Magnetic signals from Earth's tides revealed in unprecedented detail

On the left, we see satellites orbiting Earth as part of the Swarm mission. On the right, we see a diagram of the magnetic signals from Earth's oceans and processes in the lower mantle.

Scientists have captured magnetic signatures from Earth's ocean tides in the finest detail yet.

These faint signals, which certain satellites can detect when flying at very low orbits, may hold clues about magma distribution beneath the seabed, according to a statement from the European Space Agency (ESA).