ANALYSIS OF POST-DISASTER CITY STRUCTURE CHANGES IN INDONESIA: STUDY CASE MATARAM CITY OF LOMBOK (NTB)

Purpose: Research has been carried out on identifying the risk of earthquake disasters in the West Nusa Tenggara. Methodology: Region based on 3 factors: the earthquake hazard factor, namely the maximum acceleration of ground vibrations (Peak Ground Acceleration = PGA), the vulnerability factor, namely the population density of the sub-district, and the resilience factor, namely the HDI (Human Development Index) of the sub-district. in West Nusa Tenggara Province. The PGA value was calculated using the Fukushima and Tanaka attenuation function with earthquake parameter data from 1970 – 2014 with criteria of magnitude ≥ 4.5mB, depth ≤ 60 km and epicenter in the range 7.5O – 12.5O LS and 115O-120O BT, while calculating the earthquake disaster risk index uses the AHP (Analytical Hierarchy Process) method. Results and Conclusion: From the calculation results, it was found that the areas with the highest level of earthquake disaster risk were the southern part of Dompu Regency, Mataram City, Bima City, northern Bima Regency, while the lowest were West Sumbawa Regency and southern Sumbawa Regency.