Monitoring and Station Health of Türkiye – KOERI Stations and Their Contribution to AdriaArray Seismic Network

The Kandilli Observatory and Earthquake Research Institute (KOERI) has played a pivotal role in seismic monitoring in Türkiye since the late 19th century. This study highlights recent advances in the KOERI seismic network including the installation of new broadband and accelerometer stations, data management under the European Integrated Data Archive (EIDA) and contributions to the AdriaArray project. AdriaArray is a large-scale passive seismic experiment designed to improve the resolution of seismic imaging and geodynamic models across southeastern Europe by integrating data from a dense broadband seismic network. This initiative enables detailed investigations of crustal and mantle structure, anisotropy, and lithospheric deformation, offering new insights into the complex interactions between the Eurasian, Adriatic and Anatolian plates. As part of this effort, three key stations (DOGC, CRLU and TEKI) were installed in the Thrace Basin, providing valuable data for analyzing regional seismicity and tectonic activity. The performance of these stations was assessed alongside seismicity trends before and after their installation. This work emphasizes KOERI’s role in advancing regional seismic monitoring capabilities and its notable contributions to global seismological research. Furthermore, the findings underscore the transformative impact of high-density seismic networks in improving the detection of microseismic events and refining our understanding of tectonic processes. These developments also highlight the critical role of crossborder collaboration and state-of-the-art instrumentation in mitigating earthquake risks and fostering global geoscientific progress.