Chaotic Behavior of Soil Radon Gas and Applications

Abstract

A b s t r a c tThe soil 222 Rn concentration non-linear patterns are investigated by the application of various chaos methodologies based on 70 272 measurement data from the East Anatolian Fault Zone, which is one of the world's most active faults. Among these methodologies are Lyapunov exponent, surrogate data, rescaled range (R/S) analysis, Fourier spectrum, phase space reconstruction, mutual information, false nearest neighbors, and correlation dimension. The results indicate that the nonlinear dynamical approach is convenient for characterization and prediction of the 222 Rn concentration dynamics, which are in turn usually used as an earthquake precursor. Behaviour of 222 Rn gas is important in earthquake prediction researches.

Continuous radon monitoring during seven years of volcanic unrest at Campi Flegrei caldera (Italy)

“…Radon ( 222 Rn) is a radioactive element with a half-life of 3.82 days, formed in the Earth's Crust by the radioactive decay of 226 Ra in the 238 U decay series. Faults and fractures are preferential migration pathways for radon gas and carrier gases (CO 2 ), from the deep layers of the Earth's Crust to the surface [1][2][3] . The radon signal monitored in soils contains both local and remote information and is influenced by many environmental factors [4][5][6][7] .…”

Hazar Gölü’ndeki Radyoaktif Seviyelerin Belirlenmesi için Uyarlamalı Sinirsel-Bulanık Çıkarım Sistemi (ANFIS) ile Modellenmesi

“…Unlike our previous study of complex dynamic system "Chaotic Behavior of Soil Radon Gas and Applications", in this research we used ANFIS model which consist of five layers (Fig. 2) [19]. Water depth, total hardness, electrical conductivity, and pH was used as input parameters and total alpha radioactivity was defined as output parameter for the creation of the ANFIS architecture.…”

Emission of Rn and CO2From Soil at Fault Zones Caused by Seismic Waves

“…Rn is produced by the radium series in uranium‐bearing materials. Emission of Rn through active fault zones can be enhanced by seismic, volcanic and fault activities, which is demonstrated by high concentrations and flux of soil Rn worldwide (Ambrosino, Sabbarese, Roca, Giudicepietro, & Chiodini, 2020; Ambrosino, Sabbarese, Roca, Giudicepietro, & De Cesare, 2020; İçhedef et al., 2014; Kamislioglu and Külahci, 2016; Oh & Kim, 2015; Sabbarese et al., 2020; T. F. Yang et al., 2004). Anomalous discharge of CO 2 ‐rich fluid was directly measured during the 1965–1967 Matsushiro earthquakes (Cappa et al., 2009).…”