## 6 Conclusions  
The work presented in this paper was focused on the hazardous earthquake of M\({}_{uv}\) = 6.2 that happened in NW Croatia on 29 December 2020. The research was conducted on a real time basis as the Sentinel images were getting available. Figure 11: The graph shows positional (Northing and Easting) and vertical (Height) displacement of a GNSS CORS CROPOS station SISA located 30 km from the epicenter. Blue color represents the state before the earthquake and red color after the earthquake. Figure 10: The graph shows two-dimensional displacement of a CROPOS’s SISA station due to the earthquake, with ten blue dots representing SISA’s location ten days before the earthquake and ten red dots the position during ten days after the earthquake. By combining the ascending and descending orbits, we estimated the ground displacement over the affected area. The left-lateral and right-lateral surface shifts are visible from the ground displacement maps derived from SAR Sentinel-1 data. Horizontal ground displacement is around 30 cm to the West and 40 cm to the East, shifting to the East and to the West related to Pokupsko strike-slip fault, while vertical displacement has overall range amplitude of 35 cm, most pronounced along Hrastovicka gora, the mountainous area on the western side of Pokupsko fault also stretching in the NW-SE direction. Although the majority of foreshocks and aftershocks occurred along the Pokupsko fault, the impact of this complex tectonic setting is visible from the obtained vertical and west-east ground displacements, which are not one-way oriented, but on the contrary, they are dispersed unevenly around the intersection of Pokupsko and Petrinja strike-slip faults. We found the highlighted subsidence of \(-12\) cm in the southern area and an uplift of 22 cm in the north-west area as highly correlated and partially influenced by topography which is indented over that area. However, the whole area distressed by the earthquake is facing vertical displacement in the range of \(\pm 5\) cm, which we found causes a significant impact on activating the sinkholes at the south-east line of Pokupsko strike-slip fault. The GNSS analysis has yielded the results compliant to the SAR analysis, clearly showing vertical subsidence of 3 cm in the area of Sisak and horizontal displacement of 5 cm to the south-east. Maximum east-west horizontal displacement of GNSS CORS CROPOS station follows the direction of a resultant vector of Pokupsko and Petrinja fault movement, NW-SE Pokupsko fault striking dextral and NE-SW Petrinja fault striking sinistral, confirming the complex tectonic setting at the intersection of these two strike-slip faults. Based on the conducted multi temporal SAR analysis, this research confirmed the existence of two surface ruptures, Pokupsko and Petrinja strike-slip fault, seen by separating line, being the boundary line of the area where the ground displacements towards east and west occur. The results are compliant with the recent study of [54], identifying the dextral coseismic strike-slip displacement along the Pokupsko fault and the sinistral strike-slip displacement along the Petrinja fault. However, this research is important since the estimated ground displacements identify and explain some of the secondary post-seismic events that occurred over the affected area. Regarding the range of the estimated ground deformations, the future analysis should address the stability of national reference system and the detail accuracy research of real-time GNSS measurements over the affected area. Conceptualization, O.B.O. ; methodology, O.B.O. ; computation, O.B.O., M.V. ; validation, O.B.O., D.M., T.B., M.V. ; formal analysis, O.B.O., D.M., M.V., T.B. ; data curation, O.B.O., T.B. ; writing--original draft preparation, O.B.O. ; writing--review and editing, O.B.O., D.M., M.V., T.B. ; visualization, O.B.O. All authors have read and agreed to the published version of the manuscript. The APC was funded by the scientific project of University North with [PERSON] as a project lead. Not applicable.