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|Title: ||Atmospheric electrical field suppression in the time of the M =4.1 Sousel earthquake (Portugal)|
|Authors: ||Silva, Hugo Gonçalves|
|Keywords: ||Seismic precursors|
Atmospheric Electric Field
|Issue Date: ||10-Apr-2011|
|Publisher: ||Electrostatics 2011 - IOP Conferences|
|Abstract: ||In recent years different phenomena associated with seismic events have been referred in the literature. These include: unusual ultra-low-frequency electromagnetic emissions ; anomalies in very-low and low-frequencies radio transmissions ; variation of the ionosphere total electron content ; and anomalous levels of different geochemical elements (in particular radon) in the earthquake preparation zone have been reported .
Interestingly, an innovative paper has shown the possibility of enhanced air ionization, with consequent atmospheric electricity perturbations, in the preparatory stage of seismic events . It relates possible atmospheric electrical field anomalies during the earthquake preparation with surface air ionization through radon emanations.
In fact, this work presents the observation of a significant suppression of the vertical component of the atmospheric electrical field that occurred in Évora (Portugal) soon before the M = 4.1 Sousel earthquake of 27 March 2010. The observation is reported, followed by the analysis and interpretation. Preliminary conclusions and plans for future works are drawn.
References  T. Bleier et al., Nat. Hazards Earth Syst. Sci. 9, 585, 2009.  P.F. Biagi, et al., Nat. Hazards Earth Syst. Sci. 9, 1551, 2009.  V. Chauhan, et al., Journal of Geodynamics 48, 68, 2009.  J.P. Toutain and J.C. Baubron, Tectonophysics 304, 1, 1999.  R.G. Harrison, et al., J. of Atmospheric Solar-Terrestrial Phys. 72, 376, 2010.|
|Appears in Collections:||CGE - Comunicações - Em Congressos Científicos Internacionais|
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