The Central and Eastern European Infrasound Network (CEEIN) has been established in
2018 with the collaboration of four research institutes, the Zentralanstalt für Meteorologie
and Geodynamik (ZAMG), Vienna, Austria; the Institute of Atmospheric Physics of the
Czech Academy of Sciences (CAS IAP), Prague, Czech Republic; the Research Centre for
Astronomy and Earth Sciences of the Eötvös Loránd Research Network (ELKH CSFK), Budapest,
Hungary; and the National Institute for Earth Physics (NIEP), Magurele, Romania. The
Main Centre of Special Monitoring National Center for Control and Testing of Space
Facilities, State Agency of Ukraine joined CEEIN in 2019. We show how the CEEIN infrasound
arrays improve the detection capability of the European infrasound network and discuss
coherent noise sources observed at CEEIN stations. We present the first CEEIN bulletin
(2017–2020) of infrasound-only and seismo-acoustic events and using ground truth events,
we demonstrate how adding infrasound observations to seismic data in the location
algorithm improves location accuracy.
