Research Paper Earthquake Spectra 1–25 Ó The Author(s) 2020 Article reuse guidelines: sagepub.com/journals-permissions DOI: 10.1177/8755293020951206 journals.sagepub.com/home/eqs Development of the 2017 national seismic hazard maps of Indonesia Masyhur Irsyam 1,2,3 , Phil R Cummins 2,4 , M Asrurifak 2,5 , Lutfi Faizal 6 , Danny Hilman Natawidjaja 7 , Sri Widiyantoro 2,3,8 , Irwan Meilano 2,3 , Wahyu Triyoso 8 , Ariska Rudiyanto 9 , Sri Hidayati 10 , M Ridwan 6 , Nuraini Rahma Hanifa 2,3 , and Arifan Jaya Syahbana 1,7 Abstract Indonesia is one of the most seismically active countries in the world, and its large, vulnerable population makes reliable seismic hazard assessment an urgent priority. In 2016, the Indonesian Ministry of Public Works and Housing established a team of earthquake scientists and engineers tasked with improving the input data available for revising the national seismic hazard map. They compiled results of recent active fault studies using geological, geophysical, and geodetic observations, as well as a new comprehensive earthquake catalog including hypocenters relocated in a three- dimensional velocity model. Seismic hazard analysis was undertaken using recently developed ground motion prediction equations (GMPEs), and logic trees for the inclusion of epistemic uncertainty associated with different choices for GMPEs and earthquake recurrence models. The new seismic hazard maps establish the impor- tance of active faults and intraslab seismicity, as well as the subduction megathrust, in determining the level of seismic hazard, especially in onshore, populated areas. The new Indonesian hazard maps will be used to update national standards for design of earthquake-resilient buildings and infrastructure. 1 Faculty of Civil and Environmental Engineering, Bandung Institute of Technology, Bandung, Indonesia 2 Research Center for Disaster Mitigation, Bandung Institute of Technology, Bandung, Indonesia 3 Center for Earthquake Science and Technology, Research Center for Disaster Mitigation, Bandung Institute of Technology, Bandung, Indonesia 4 Research School of Earth Sciences, Australian National University, Canberra, ACT, Australia 5 School of Civil Engineering, National Institute of Science and Technology, South Jakarta, Indonesia 6 Research Institute for Housing and Human Settlements, Ministry of Public Works and Housing, Bandung, Indonesia 7 Research Center for Geotechnology, Indonesian Institutes of Sciences, Bandung, Indonesia 8 Faculty of Mining and Petroleum Engineering, Bandung Institute of Technology, Bandung, Indonesia 9 Center for Engineering Seismology, Potential Geophysics and Time Standard, Agency for Meteorology, Climatology and Geophysics, Jakarta, Indonesia 10 Center for Volcanological and Geological Hazard Mitigation, Geological Agency, Bandung, Indonesia Corresponding author: Arifan Jaya Syahbana, Faculty of Civil and Environmental Engineering, Bandung Institute of Technology, Jalan Ganesha no.10, Bandung 40132, Indonesia. Email: arifanjaya84@gmail.com