Scientific cooperation between the Charles University in Prague, Faculty of Mathematics and Physics, Department of Geophysics, and the University of Patras, Geological Department, Seismological Laboratory, has originated in 80’s. Since 1997 the two groups jointly operate seismic stations in western Greece. The stations are equipped with weak- and strong-motion sensors. Some stations have satellite connection to the Patras hub. One station transmits on-line data to the ORFEUS international data center. The stations belong to the Patras network PSLNET, which is a part of the national Greek network HUSN.
The two groups together have investigated a number of significant earthquakes; for example the M5.9 Athens 1999 (Tselentis and Zahradník, 2000; Plicka and Zahradník, 2002), M6.5 Skyros 2001 (Zahradník 2002), M4.7 Aegion 2001 (Janský et al., 2004; Zahradník et al., 2004), M6.3 Lefkada 2003 (Zahradník et al., 2005), M5.5 Zakynthos 2006 (Zahradník et al., 2008c), M6.2 Leonidio 2008 (Zahradník et al., 2008a), M3.5-4.5 earthquakes in the Corinth Gulf (Zahradník et al., 2008b), M6.3 Movri Mountain 2008 (Gallovič et al., 2009). For more papers see References.
Joint efforts include also development of software ISOLA for moment-tensor calculations, including complex events (Sokos and Zahradník, 2008). The software is used in Patras for routine determination of the focal mechanisms that are reported to the EMSC center. Quick assessment of earthquake fault planes of M>6 events, also reported to EMSC, is performed by the jointly developed H-C method.