Despite being essential to life on Earth, the magnetic field isn’t something we can actually see in itself, or ever hear. But, remarkably, scientists at the Technical University of Denmark have taken magnetic signals measured by ESA’s Swarm satellite mission, and other sources, and converted them into sound. The rumble of Earth’s magnetic field is being broadcast to the public via 32 loudspeakers dug into the ground at the Solbjerg Square in Copenhagen, Denmark. Each speaker represents a different location on Earth and demonstrates how the magnetic field has fluctuated over the last 100 000 years.

The loudspeakers at Solbjerg Square in Copenhagen, Denmark, are broadcasting the rumble of Earth’s magnetic field on 24–30 October three times a day at around 08:00, 13:00 and 19:00.

Read news story: The scary sound of Earth’s magnetic field

Straight to audio: The sound of the magnetic field