Nonlinear and Pre–seismic observations using data of Radon Emissions in Kachchh, Gujarat

Sushanta Ku Sahoo; Chiranjib Barman; K. M. Rao

Volume : VII, Issue : IV, April - 2017

Nonlinear and Pre–seismic observations using data of Radon Emissions in Kachchh, Gujarat

Sushanta Ku Sahoo, Chiranjib Barman, K. M. Rao

Abstract :

In this paper, we carried out the study of possible earthquake precursors and understand the nonlinear phenomenon using the soil radon–222 data recorded both in Kachchh and Gandhinagar, Gujarat. We established a network of geochemical laboratories to monitor Geochemical signals continuously (mainly) by using RTM–1688 probe manufactured by Sarad Instruments, Germany at Desalpar, Vamka, Badargadh of Kachchh region which is considered to be seismically active. On the other hand, the same kind of instrumental set up has been installed at ISR, Raisan campus, Gandhinagar in order to compare the signal for both the seismically active and quiet regions. The data is also used in understanding the nature of soil radon–222 emission process.The average value of radon for soil–gas at Desalpar is found to be 1.91 kBq/ m³ with a standard deviation (Std.) of 0.98 kBq/ m³.With few exceptions radon in general shows small negative correlation with temperature i.e., the value of radon concentration decreases as temperature increases and increases with decrease in temperature. The correlation coefficient between radon and temperature is found to be –0.3. Positive correlation coefficient 0.3 between radon and pressure has been found i.e., radon decreases with decrease in pressure and increases with increase in pressure. The correlation of radon with humidity is found to be 0.05 which is statistically insignificant.