title: Self-organised critical features in soil radon and MHz electromagnetic disturbances: results from environmental monitoring in Greece.
abstract: This paper addresses the issues of self-organised critical behaviour of soil-radon and MHz-electromagnetic disorders during intense seismic activity in SW Greece. A significant radon signal is re-analysed for environmental influences with Fast Fourier Transform and multivariate statistics. Self-organisation of signals is investigated via fractal evolving techniques and detrended fluctuation analysis. New lengthy radon data are presented and analysed accordingly. The data did not show self-similarities. Similar analysis applied to new important concurrent MHz-electromagnetic signals revealed analogous behaviour to radon. The signals precursory value is discussed.
authors.affiliation: Department of Engineering and Design, Brunel University, Kingston Lane, Uxbridge, Middlesex, UB8 3PH London, UK.
authors.forename: Ermioni
authors.initials: E
authors.lastname: Petraki
authors.forename: Dimitrios
authors.initials: D
authors.lastname: Nikolopoulos
authors.forename: Anaxagoras
authors.initials: A
authors.lastname: Fotopoulos
authors.forename: Dionisios
authors.initials: D
authors.lastname: Panagiotaras
authors.forename: Grigorios
authors.initials: G
authors.lastname: Koulouras
authors.forename: Athanasios
authors.initials: A
authors.lastname: Zisos
authors.forename: Constantinos
authors.initials: C
authors.lastname: Nomicos
authors.forename: Anna
authors.initials: A
authors.lastname: Louizi
authors.forename: John
authors.initials: J
authors.lastname: Stonham
mesh_terms: D004574:Electromagnetic Fields; D004784:Environmental Monitoring; D006115:Greece; D011886:Radon / Q000737:chemistry*; D012990:Soil Pollutants, Radioactive / Q000737:chemistry*
chemical_list: D012990:Soil Pollutants, Radioactive; D011886:Radon