The ultra low frequency electromagnetic radiation observed in the topside ionosphere above boundaries of tectonic plates. Research in Geophysics, [S. l.], v. 4, n. 1, 2015. DOI: 10.4081/rg.2014.5001. Disponível em: https://journals.pagepress.org/rg/article/view/5001. Acesso em: 12 sep. 2025.