Northern Promontory of AdriaArray: Network Design and Realization

Abstract

The northern extension of the AdriaArray, a dense network of broadband seismic stations, covers the southeastern part of the Bohemian Massif, the Eastern Alps, the Western Carpathians, and the northernmost part of the Pannonian Basin. Considering also the previous passive experiments carried out since 2015, the existing 32 broadband permanent stations have been complemented by 89 temporary stations deployed in the collaborative effort of institutions from the Czech Republic, Poland, Austria, and Slovakia. We document the seismic station configuration, instrumental equipment, data transmission, preprocessing, and availability, as well as the general organization of the network. Since spring 2022, when the AdriaArray network started its operation, to January 2025, approximately 2.8 TB of data recorded by the temporary stations has been transmitted to the European Integrated Data Archive (EIDA), with an average completeness of 80% and real‑time operation for 91% of the stations. The network records valuable data for a wide range of Earth science studies, including earthquake location, seismic hazard assessment, and high-resolution images of the crust and upper mantle structure. As examples of data utilization, we show Moho depth variations from the Bohemian Massif to the West Carpathians and the northernmost part of the Pannonian Basin, as well as prevailing NW‑SE polarization azimuths of the fast shear waves from the splitting evaluations at stations in the broader surroundings of the Carpathians.