Irregularities in the Relationship of Variations in the Radon Volume Activity and Atmospheric Pressure during Seismic Activation (by the Example of the Baikal Region).

This paper reports the comparison results obtained for temporal variations in atmospheric pressure and soil radon concentration measured in loose sediments at three monitoring stations in the Baikal region for the period of three relatively strong earthquakes such as Bystrinskii (September 21, 2020, K = 14.6), Kudarinskii (December 9, 2020, K = 14.0), and Khubsugulskii (January 11, 2021, K = 16.0). According to the emanation monitoring data, radon release is controlled in this region by variations in atmospheric pressure. As first identified by the formalized statistical analysis, this relationship is subjected to irregularities in the course of each seismic activation studied. They are related to the earthquake preparation processes. Upon expanding the monitoring network, this discovery opens up real opportunities for developing the emanation approach to medium-term forecasting. [ABSTRACT FROM AUTHOR]