Correlation of in-situ online 222Rn data at Mat fault with geophysical process

Abstract

This study aims to correlate radon concentration anomalies with geophysical phenomena along the Indo-Burman subduction region. The soil radon production rate and exhalation rate of four different sampling depths were generated at Mat fault, Mizoram (India) between May 2018 and October 2018 and correlated. The nature of the obtained correlation coefficient was then further correlated with geophysical phenomena of the region. A ZnS(Ag) based scintillation counter named SMARTRnDuo (Model: SMARTRnDuo, BARC, India) was deployed for all 222Rn measurements. To categorize the 222Rn data into the anomaly and non-anomaly period data a meteorologically free radon data whose peaks being attributed only by geophysical phenomena was simultaneously generated at Mizoram University, Aizawl, Mizoram (India). A strong correlation coefficient was observed during the non-anomaly period between the radon production rate and exhalation rate while a weak or insignificant correlation coefficient during the anomaly period. The adopted method seems to be significant for premonitory of radon anomaly due to geophysical of the region.