AUTHOR=Zhao Shufan , Shen Xuhui , Zhou Chen , Xia Zhiyang , Peng Huaiyun , Liao Li TITLE=Editorial: Space- and ground-based observations of ELF (extremely low frequency)/VLF (very low frequency) electromagnetic waves and their propagation mechanisms JOURNAL=Frontiers in Astronomy and Space Sciences VOLUME=10 YEAR=2023 URL=https://www.frontiersin.org/journals/astronomy-and-space-sciences/articles/10.3389/fspas.2023.1335615 DOI=10.3389/fspas.2023.1335615 ISSN=2296-987X