## 2 Seismicity of the Selected Countries
### Bosnia and Herzegovina
This is the strongest earthquake that occurred since the 1880 Great Zagreb earthquake (magnitude of 6.3). The seismicity of this region (Croatia and the upper part of Bosnia and Herzegovina-Banja Luka region) is given in Figure 4. Looking at the map, it is believed that the Petrinja fault is the same as the Banja Luka fault, as indicated in Figure 3 and indicated as PKBL = Pokupple-Kostajnica-Banja Luka right-lateral fault. After the Petrinja earthquake, a quick field inspection revealed that fresh fault planes in the outcrops on the Hrastovicka gora appeared mostly along the longitudinal NW-SE-striking Pokupsko-Kostajnica-Banja Luka Fault and showed clear dextral coseismic strike-slip displacements and a 20 km long section of the Pokupsko Fault was (re)activated. It is assumed by [PERSON] et al. (2018) that the creeping sinistral Sisak-Petrinja-Glina-Topusko Fault is locking the dextral Pokupsko-Kostajnica-Banja Luka Fault and a similar complex fault mechanism is also proposed for the Banja Luka area. According to [PERSON] et al. (2018), the dextral Pokupsko-Banja Luka Fault could be one of the main inherited active faults between the crustal segments of Adria. Figure 3: The spatial distribution of earthquakes in Croatia (373 BC–2019, according to the Croatian Earthquake Catalogue (CEC), of which an updated version was first described in (K  
Taking this all into account, it is of the utmost importance to take Bosnia and Herzegovina into account regarding the effects of earthquakes on target displacement in RC structures and other structures as well. Other than the Peak Ground Acceleration, it is necessary to take into account the vulnerability of structures and the exposure of the population during the assessment of the seismic risk. After the Petrinja earthquake, the seismic community in Bosnia and Herzegovina discussions started, and at the moment, there are initiatives for a revision of the interactive seismic map of Bosnia and Herzegovina. Papers [72] gave the most comprehensive picture of the tectonic structure in Bosnia and Herzegovina. The longest fault is the Sarajevo Fault, which spreads in the direction of NW-SW, followed by the Banja Luka fault and Konjic Fault. Sarajevo fault with a low to moderate seismic activity level is under-passed by all the transversal deep faults, where the highest seismic motions are noted. [PERSON] et al. [73] presented that 64% of all earthquakes have a focal depth of up to 10 km and that this is one of the causes of the damaging impact on the structures. Bosnia and Herzegovina in the last 50 years was hit by more than a few medium-sized earthquakes of magnitude M\({}_{\rm w}\) up to 6.1 [74]. The earthquake, which had the most devastating impact on the structures, was the 1969 Banja Luka earthquake. According to the MSK-64, the Banja Luka earthquake was marked as a VIII intensity scale [75]. The aftermath of this earthquake was 15 fatalities, 1117 injured people, and over $300 million in damage [74,76]. The second-largest earthquake that should be mentioned is the 1962 Treskavica earthquake with a magnitude Mw= 5.9, and a focal depth of 15 km. As the epicenter of the earthquake was in an abandoned area of Mount Treskavica, there were no major casualties, nor significant damage to the buildings due to the low level of population and construction in this region at that time [77]. Several structures have been damaged in Sarajevo by this earthquake activity (Building of the Executive Council, the Main Post Office, Faculty of Medicine) [73]. The damage caused by this earthquake in the financial means was equal to 396 million dinars [78]. Looking at the period from 306 to 2015, 66.9% of all earthquakes had a magnitude between 3.6-4.5, while 20.5% of the earthquakes had a magnitude in the  
Figure 4: Map of earthquake epicenters in Croatia and part of Bosnia and Herzegovina in the period from BC to 2015 according to the Catalog of Earthquakes in Croatia and the neighboring areas [66, 67, 68, 69, 70, 71]. range of 4.6 to 6.