Ljudet från Very Low Frequency (VLF) radio kan höras live på webben.
NSPIRE VLF radio receiver at NASA's Marshall Space Flight Center https://www.spaceweather.com/glossary/inspire.html
Renato Romero IK1QFK Very Low Frequency (VLF) page https://www.vlf.it/
RSGB Book shop - Radio Nature by Renato Romero, IK1QFK https://www.rsgbshop.org/acatalog/Online_Catalogue_What_s_New_26.html
Weak Signal software for LF https://www.weaksignals.com/