Atmospheric electrical field decrease during the M = 4.1 Sousel earthquake (Portugal)

Autor: Silva, H. G., Bezzeghoud, M., Reis, A. H., Rosa, R. N., Tlemçani, M., Araújo, A. A., Serrano, C., Borges, J. F., Caldeira, B., Biagi, P. F.
Jazyk: angličtina
Rok vydání: 2018
ISSN: 1684-9981
Popis: In this paper, we report the observation of a significant decrease of the vertical component of the atmospheric electrical field in the Évora region (Portugal) during the M = 4.1 Sousel earthquake of 27 March 2010. The epicentre of the earthquake was 52 km from the observation site, which falls within the theoretical earthquake preparation radius. A simple interpretation based on hypothetical radon emissions is presented, and future experiments required to elucidate these observations are outlined. To our knowledge, this is the first reported observation of a decrease of the atmospheric electrical field preceding an earthquake.
Databáze: OpenAIRE