This research aims to map the level of potential and analyze and map the microzonation of building damage after an earthquake disaster in Nagari Kajai, West Pasaman Regency. The method used in mapping the potential level of earthquake hazard is scoring analysis, while in modeling the microzonation map of building damage is done by buffer method and matching the zone of danger level, then validating the model with field survey method which is integrated into the results of on-screen digitization of high-resolution satellite image interpretation of each distribution of damaged buildings at the research location.
The results of this study are in the form of a map model of the potential level of earthquake disaster hazard which is divided into three zones, namely unstable areas with a score of 46-60, less stable areas have a score of 31-45, and stable areas against earthquakes have a score of 15-30. The results of the analysis of the microzoning map of post-earthquake building damage in Nagari Kajai, West Pasaman Regency obtained a microzoning area, in the unstable class covering 3583.63 ha, located in the jorong rimbo batu, kampung alang, pasa lamo area. In the less stable microzonation class covering an area of 6349.78 ha, located in the limpato jorong area, most of the lubuak sariak jorong area, and part of the tanjuang beruang jorong area, and in the stable class has an area of 1251.04 ha, located in the mudiak simpang jorong area, part of the timbo abu jorong, limpato, and some of the lubuak sariak jorong area.
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