By Harry Baker published February 27, 2023
“Solar radio bursts, as well as some stellar radio bursts from distant stars, occasionally contain regularly repeating patterns known as quasi-periodic pulsations (QPPs). These patterns involve brief breaks in the radiation stream, which create troughs and peaks when viewed on a graph, similar to an electrocardiogram (ECG or EKG), a recording of the electrical signals from the heart.”
https://www.livescience.com/puzzle-of-the-suns-mysterious-heartbeat-signals-finally-solved
