In IPE we process records from all stations of the Czech Regional Seismic Network, short-period stations of IPE and several dozen stations of neighbouring countries. We analyse all well-registered seismic events (near and distant earthquakes, explosions, events induced by mining or other human activities). We mainly focus on seismic events with an origin in the Czech Republic and its vicinity, especially natural earthquakes. All analyses are carried out with the assistance of seismologists, and the data in the bulletins and catalogues of IPE can thus be guaranteed. Some catalogues are compiled in collaboration with partner organisations.