Proceedings of the 12th International INQUA meeting on paleoseismology, active tectonic and archaeoseismology

the interpretation presented in Fig. 3. The seismic section west of the mainshock epicenter suggested the presence of a major strike- slip flower structure within the ridge (Fig 3), characterized by noncontinuous, chaotic reflectors. The uppermost strata were deformed by anticline, suggesting anticline activity in recent times. While no parallel horizontal strata in the ridges may suggest the ridges are active during recent times. The seismic section from Silver et al. (1983) revealed the Flores Thrust in the southern region (lower left part inFig. 3). Furthermore, a correlation was identified between anticlines observed in the multibeam bathymetry and the fault in the younger strata. The trace of the Kalaotoa Fault, as observed in our study, appears to merge with the Florest Thrust in the southeastern region. This observation suggests a potential interaction or connection between these two significant geological structures. Furthermore, there is a possibility that the influence of the Kalaotoa Fault extends beyond the immediate offshore area. It may continue into the onshore region, crossing the Flores Thrust. This potential extension could Fig. 3 : Seismic section from Silver et al. (1983) and Rahardiawan & Purwanto (2014). Interpretation of the fault based on the morphology and the seismic section shows a strike-slip structure next to the Flores Thrust fault.