苏门答腊岛是印尼西部海啸高发的一个大型岛屿。以该岛为例，基于海啸灾害风

Sumatra is a large island in western Indonesia that is prone to tsunamis. Taking the island as an example, based on the tsunami disaster risk assessment theory, the tsunami assessment index system of the island is obtained by using data such as night light remote sensing, and the analytic hierarchy process is used to evaluate the vulnerability of the region before the occurrence of the Indian Ocean tsunami. The accuracy is determined by the occurrence of the tsunami. The post-disaster statistics data are combined with remote sensing interpretation for demonstration. The evaluation results are: the areas of low, slightly low, medium, slightly high, and high vulnerability areas account for 79.84%, 15.35%, 1.94%, 0.29%, and 2.58%, respectively, and the vulnerability decreases inland. The characteristics of higher vulnerability areas Mainly the shape of the coast is concave and the elevation is small, within 5km offshore. The empirical results show that the areas with the most serious losses after the tsunami are all in the middle and high vulnerability areas, and this vulnerability assessment method can provide help for other coastal cities to deal with tsunami disasters.

Sumatra island is a large island with high tsunami incidence in western Indonesia. Taking the island as an example, based on the tsunami disaster risk assessment theory, the tsunami assessment index system of the island is obtained by using night light remote sensing and other data, and the vulnerability of the region before the Indian Ocean tsunami is evaluated by analytic hierarchy process. The accuracy is demonstrated by the disaster statistics after the tsunami combined with remote sensing interpretation. The evaluation results are as follows: the areas of low, slightly low, medium, slightly high and high vulnerability areas account for 79.84%, 15.35%, 1.94%, 0.29% and 2.58% respectively. The vulnerability decreases inland. The characteristics of high vulnerability areas are mainly concave coastal shape, small elevation and within 5km offshore. The empirical results show that the areas with the most serious losses after the tsunami are in the medium and high vulnerability areas. This vulnerability assessment method can provide help for other coastal cities to deal with the tsunami disaster.

Sumatra is a large island with high tsunami incidence in western Indonesia. Taking the island as an example, based on the tsunami disaster risk assessment theory, the tsunami assessment index system of the island was obtained by using remote sensing data such as luminous lights, and the vulnerability of the Indian Ocean before the tsunami in this region was evaluated by AHP. The accuracy was verified by the disaster statistics data after the tsunami combined with remote sensing interpretation. The evaluation results show that the areas of low, slightly lower, medium, slightly higher and highly vulnerable areas account for 79.84%, 15.35%, 1.94%, 0.29% and 2.58%, respectively, and the vulnerability decreases inland. The features of higher vulnerable areas are mainly concave coastal shape, small elevation and less than 5km offshore. The empirical results show that the areas with the most serious losses after the tsunami are all in the middle and high vulnerable areas, and this vulnerability assessment method can provide help for other coastal cities to cope with the tsunami disaster.