Zagreb occasionally experiences earthquakes , due to the proximity of Žumberak-Medvednica fault zone . It 's classified as an area of high seismic activity . The area around Medvednica was the epicentre of the 1880 Zagreb earthquake ( magnitude 6.3 ) , and the area is known for occasional landslide threatening houses in the area . The proximity of strong seismic sources presents a real danger of strong earthquakes . Croatian Chief of Office of Emergency Management Pavle Kalinić stated Zagreb experiences around 400 earthquakes a year , most of them being imperceptible . However , in case of a strong earthquake , it 's expected that 3,000 people would die and up to 15,000 would be wounded
1880 Zagreb earthquake
1880 Zagreb earthquake
Zagreb