Social vulnerability toward tsunami hazard in the coastal area of Bayah Dome Geopark, in Lebak Regency, Banten Province

The prominent character of geodiversity, biodiversity, and cultural diversity in Bayah Dome coastal has encouraged the Lebak Regency government to promote Bayah Dome Geopark (BDG) in 2020. On the other side, the potential hazards of an earthquake and tsunami originating from the subduction zone on the south coast of the BDG will increase the vulnerability of the community. This study aims to develop a social vulnerability model for the tsunami disaster in the BDG area based on the population potentially exposed to the disaster and the vulnerable group's ratio parameters. This research was conducted in six sub-districts in the southern part of the BDG coastal area. The results show the Bayah and Malingping sub-districts have the highest level of social vulnerability. Bayah District in 2019 was the highest with a score of 2.0, this was due to the high number of tourist visitors. Meanwhile, Wanasalam, Cilograng, Panggarangan, and Cihara have low social vulnerability classes with a score of 1.4. Therefore, it is recommended to prioritize social intervention for Bayah and Malingping sub-districts to upgrade community capacity for tsunami hazards.