Variation of soil gas Rn-222/Rn-220 concentration ratios along the Pinarbasi segment of Izmir fault

Measurements of Rn-222 and Rn-220 activity were carried out along the Pinarbasi segment of the Izmir Fault (IF) to get new information on this fault and its seismicity. Izmir Fault is one of the most important active tectonic structures in Turkey's Active Fault Map. Due to very intense urbanization, there is not enough information about the fault. This study also discusses the usability of the Rn-222/Rn-220 ratio as a geodynamic precursor.