NAGARAJOO, K. Earthquake Analysis over the Equatorial Region by Using the Critical Frequency Data and Geomagnetic Index. Journal of Engineering and Technology (JET), [S. l.], v. 2, p. 31–42, 2011. Disponível em: https://jet.utem.edu.my/jet/article/view/199. Acesso em: 2 may. 2024.