The Hungarian National Seismological Network (HNSN) is a permanent seismological network operated by the Kövesligethy Radó Seismological Observatory (Geodetic and Geophysical Institute, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences). The main purpose of the network is the continuous monitoring of the seismicity of Hungary and to provide high quality data for the seismological and geodynamic scientific research. The first digital seismological station of the HNSN started its operation in 1992. The...