INVESTIGATION OF CHANGES IN INDOOR RADON CONCENTRATIONS BEFORE AND AFTER SEISMIC ACTIVITIES IN GYEONGJU AND POHANG, KOREA. INTERNATIONAL JOURNAL OF GEOMATE [Internet]. 2019 Apr. 30 [cited 2026 Jun. 28];16(56):98-103. Available from: https://geomatejournal.com/geomate/article/view/2679