HAYAKAWA, Masashi; HOBARA, Yasuhide; YASUDA, Yoshihiro; YAMAGUCHI, Hiroki; OHTA, Kenji; IZUTSU, Jun; NAKAMURA, Tohru. Possible precursor to the March 11, 2011, Japan earthquake: ionospheric perturbations as seen by subionospheric very low frequency/low frequency propagation. Annals of Geophysics, [S. l.], v. 55, n. 1, 2012. DOI: 10.4401/ag-5357. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/5357. Acesso em: 31 mar. 2026.