Advances in Biology & Earth Sciences

Almost all regions in Indonesia are prone to earthquake. The post-earthquake disaster or secondary geological disasters (SGDs) can occur directly or after long intervals of great earthquake. Tsunami, liquefaction, slope failure, landslide, urban fire and dam failure are recognized as secondary hazard which occur directly after an earthquake. Moreover, the earthquake impact also can trigger the other hazard such as flood that occurred after long intervals of great earthquake. Yogyakarta special province, is one a large city which located in the south part of Central Java. Yogyakarta has a complex geomorphological and geological configuration. This physical configuration makes Yogyakarta rich of natural disaster including earthquake, landslide, flood, drought, strong wind, tsunami and wave erosion. Nowadays, the enhancement on technology such as remote sensing and geographic information system (GIS) become a powerful instrument in spatial analysis and modelling for earthquake hazard and other derived geohazards. The main objective of this research is to conduct the comprehensive multi hazard risk assessment caused by an earthquake such as coseismic landslide by using remote sensing and geographic information systems in two different physical characteristics of the study area. The integrated analysis between remote sensing, geographic information system (GIS) and intensive field observation will be conducted to investigate the coseismic landslide in study area. The results shows that the coseismic landslides often occur on the middle slopes of the Baturagung Escarpment, where lithological contacts between the Semilir and Nglanggran formations create weak zones of instability. High-susceptibility areas are concentrated in Wukirsari, while rapid landuse change driven by tourism development is most evident in Imogiri and Dlingo, where new settlements expand along road networks. Projections indicate that by 2026 and 2032 these expanding areas will increasingly overlap with moderate- to high-susceptibility zones, raising exposure of populations and infrastructure and underscoring the need for integrated hazard and landuse planning. Landslide susceptibility in the Dlingo–Imogiri region is strongly influenced by relief, lithology and rainfall, with high-risk zones concentrated in Wukirsari. Rapid settlement expansion driven by tourism increasingly overlaps with these hazard-prone areas, calling for integrated hazard zoning and resilient development planning.