Microzoning of Landslide Potential Area in MAN Insan Cendekia Area of Central Bengkulu Using Microtremor Method

The MAN Insan Cendekia Central Bengkulu region has topographic characteristics and geological conditions that are prone to landslides, so scientific-based mitigation efforts are needed. This research aims to microzone the landslide potential area using microtremor method. Microtremor wave data were recorded at a number of points scattered in the study area and analyzed using the Horizontal-to-Vertical Spectral Ratio (HVSR) method to determine the dominant frequency value (f0) and soil amplification. The analysis results were used to map the landslide vulnerability level into low, medium, high and very high zones. The microzonation map shows a varied distribution of landslide potential, with certain areas having a high level of vulnerability due to topography and soil geotechnical conditions. This research provides mitigation recommendations that can be used as a basis for disaster risk management and development planning in the area. Based on the analysis obtained in the MAN Insan Cendekia Central Bengkulu Region, the lowest dominant frequency value is 1.25 Hz and the highest value is 8.67 Hz, the lowest amplification factor value is 1.61 and the highest is 5.37 and the lowest seismic vulnerability index value is 0.48 and the highest is 17.91. Areas with high landslide potential are located in IC11, IC12, IC13, IC14, IC15. Keywords: Microzonation, landslide, microtremor, HVSR, disaster mitigation