How the earth shook for nine days and nobody knew why – video

An unprecedented planetary-scale seismic event caused the earth to vibrate for nine days straight back in 2023, but the reason why was unclear. Scientists initially had more questions than answers, labelling the event an unidentified seismic object and undertook a mammoth scientific collaboration across multiple countries and institutions to get to the bottom of what really happened. Josh Toussaint-Strauss looks into the mystery at the heart of this scientific investigation

• Entire Earth vibrated for nine days

• The original study conducted by Svennevig et al. (2024) and published in Science