10. Sounds Associated with Auroras
Some observers have reported hearing faint crackling or rustling sounds during auroral displays, a phenomenon that has intrigued scientists for years. Research by Professor Unto K. Laine of Aalto University in Finland suggests that these sounds result from electrical discharges in a temperature inversion layer approximately 70 meters above the ground. During geomagnetic storms, charged particles from the Sun interact with Earth’s magnetic field, leading to these discharges and the associated sounds. Notably, these sounds can occur even when the auroras themselves are not visible. (aalto.fi) For a more in-depth exploration of this topic, you can refer to the article “Auroras Make Weird Noises, and Now We Know Why” by National Geographic. (nationalgeographic.com)