Croatian scientists have published a fresh seismic hazard assessment that changes how the country's earthquake risk looks — and for anyone who loves the Adriatic coast, the findings land close to home. The map, released in September 2026 in the Bulletin of Earthquake Engineering, shows the greatest danger along the coastline, with the Dubrovnik-Neretva region and central Dalmatia standing out.
The numbers behind the headlines: when local soil conditions are factored in, Dubrovnik registers a peak ground acceleration of around 0.40 g — meaning a 10 percent chance that shaking will exceed that level within 50 years. Split follows at 0.32 g, Rijeka at 0.27 g, Zagreb at 0.24 g, Petrinja at 0.22 g and Osijek at just 0.08 g. For comparison, Dubrovnik was nearly destroyed by an estimated magnitude 7 earthquake in 1667, while Zagreb's 1880 quake measured around magnitude 5.9.
What makes this study different is the inclusion of real soil data rather than calculations for solid rock alone. Soft deposits can amplify shaking, so two identical buildings on different ground can fare very differently. The model drew on a catalogue of 90,003 mainshocks across Croatia and its neighbours — quakes in Montenegro and Albania matter for Dubrovnik — and split the region into 32 zones reflecting three large tectonic units: the Adriatic Foreland, the Dinarides and the Pannonian Basin.
One surprising result: low, rigid buildings such as family houses may face higher seismic loads than current rules assume, both on the coast and around Petrinja, while tall buildings generally face lower ones. The 2020 quakes — a magnitude 5.5 in Zagreb in March and a magnitude 6.2 in Petrinja that December — are fresh reminders of what poor construction plus strong shaking can do.
The map is a scientific study, not law. It doesn't set binding design values or predict when the next quake will strike, but it gives authorities a basis for updating Croatia's national annex to Eurocode 8, the European earthquake-resistant building standard, whose current Croatian version dates from 2011.
Why should travellers care? Croatia welcomes millions of visitors who sleep in old stone houses in Dubrovnik, Split and the islands — buildings often standing on soft alluvial soil. The science doesn't mean tourists should avoid the coast; earthquakes have no schedule, and a 475-year return period is a statistical average, not a calendar. But it's a useful reality check for anyone buying a holiday home or renovating property in Dalmatia: building standards, soil conditions and structural condition matter enormously. The research team itself stresses that better knowledge should translate into safer construction — the point of the map is preparedness, not panic. For visitors, it's simply a nudge to notice the difference between centuries-old walls maintained to modern codes and the casual rental conversion that wasn't.
