Articles | Volume 15, issue 12
https://doi.org/10.5194/nhess-15-2697-2015
https://doi.org/10.5194/nhess-15-2697-2015
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18 Dec 2015
Comment/reply | Highlight paper |  | 18 Dec 2015

Comment on "Ultra low frequency (ULF) electromagnetic anomalies associated with large earthquakes in Java Island, Indonesia by using wavelet transform and detrended fluctuation analysis" by Febriani et al. (2014)

F. Masci and J. N. Thomas

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Cited articles

Balasis, G., Daglis, I. A., Papadimitriou, C., Kalimeri, M., Anastasiadis, A., and Eftaxias, K.: Investigating dynamical complexity in the magnetosphere using various entropy measures, J. Geophys. Res., 114, A00D06, https://doi.org/10.1029/2008JA014035, 2009.
Balasis, G. and Mandea, M.: Can electromagnetic disturbances related to the recent great earthquakes be detected by satellite magnetometers?, Tectonophysics, 431, 173–195, https://doi.org/10.1016/j.tecto.2006.05.038, 2007.
Campbell, W. H.: Natural magnetic disturbance fields, not precursors, preceding the Loma Prieta earthquake, J. Geophys. Res., 114, A05307, https://doi.org/10.1029/2008JA013932, 2009.
Dobrovolsky, I. P., Zubkov, S. I., and V. I. Miachkin: Estimation of the size of earthquake preparation zones, Pure Appl. Geophys., 117, 1025–1044, https://doi.org/10.1007/BF00876083, 1979.
Febriani, F., Han, P., Yoshino, C., Hattori, K., Nurdiyanto, B., Effendi, N., Maulana, I., and Gaffar, E.: Ultra low frequency (ULF) electromagnetic anomalies associated with large earthquakes in Java Island, Indonesia by using wavelet transform and detrended fluctuation analysis, Nat. Hazards Earth Syst. Sci., 14, 789–798, https://doi.org/10.5194/nhess-14-789-2014, 2014.
Short summary
Reports of possible earthquake precursors have social responsibility. They motivate the idea that earthquakes may be predicted in the future. Thus, these papers should be convincing about the seismogenic origin of the reported precursors. We have reviewed Febriani et al. (2014). We have shown that the pre-earthquake magnetic changes they reported are not seismogenic but global-scale variations in the geomagnetic field in response to Sun–Earth interactions.
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