Earthquake shocks generally cause the biggest shocks in building structures. Earthquake waves, generated by an earthquake event, are the main cause of this shaking. A new building of the Faculty of Law, Islamic University of Indonesia, was selected for this research to evaluate the effect of earthquake shaking on the structural response. A developed time history-based artificial earthquake ground motion was used in the structural analysis. Furthermore, the time history was developed based on spectral matching with target spectra derived from a probabilistic seismic hazard analysis. This analysis results in the building structure's seismic response, which is then evaluated based on the parameters set by the earthquake standards/regulations for buildings. This building is relatively safe against design earthquake shocks based on the results.

Sulawesi is one of Indonesia's large islands with a high vulnerability to earthquakes due to its geographical location, which lies between the confluence of tectonic plates and several active faults. The earthquake events' intensity was relatively high with small to large magnitudes. One area recently hit by a large earthquake that caused material losses and casualties was found in Mamuju. Given this condition, it is essential to determine the latest seismicity mitigation in the Mamuju area and its surroundings to look at the distribution of the mainshock based on the magnitude and depth of the earthquake. Earthquakes that occur in a particular area and for a certain period can describe the concentration of earthquake activity. The earthquake data activity used in this study is to find earthquake data for the period 1960-2021, followed by a declustering process which is carried out to separate the mainshock from the aftershocks. Separating the mainshock from the aftershocks is performed using the time window and distance windows criteria. Based on the analysis, it was found that the number of mainshocks that occurred in the Mamuju region was 20.11% of the total earthquake events that occurred (5366 earthquake event data) with a dominance of moderate to large magnitude (4<M<6). Meanwhile, based on the depth of the earthquake, 54.19% of the earthquake event were shallow earthquakes (0 km < D < 60 km). This can be used as a basis for updating existing earthquake maps and for paying attention to the application of earthquake-resistant building regulations and building construction permits in the Mamuju area, considering that the vulnerability to earthquakes in this area is relatively high.