Development of the 2017 national seismic hazard maps of Indonesia
Irsyam M.a, Cummins P.R.a,b, Asrurifak M.a,c, Faizal L.d, Natawidjaja D.H.e, Widiyantoro S.a, Meilano I.a, Triyoso W.a, Rudiyanto A.f, Hidayati S.g, Ridwan M.d, Hanifa N.R.a, Syahbana A.J.a,e
a Faculty of Civil and Environmental Engineering, Bandung Institute of Technology, Bandung, Indonesia
b Research School of Earth Sciences, Australian National University, Canberra, Australia
c School of Civil Engineering, National Institute of Science and Technology, South Jakarta, Indonesia
d Research Institute for Housing and Human Settlements, Ministry of Public Works and Housing, Bandung, Indonesia
e Research Center for Geotechnology, Indonesian Institutes of Sciences, Bandung, Indonesia
f Center for Engineering Seismology, Potential Geophysics and Time Standard, Agency for Meteorology, Climatology and Geophysics, Indonesia
g Center for Volcanological and Geological Hazard Mitigation, Geological Agency, Bandung, Indonesia
Abstract
© The Author(s) 2020.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 importance 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.
Author keywords
Earthquake recurrence,Epistemic uncertainties,Geodetic observation,Ground-motion prediction equations,Scientists and engineers,Seismic hazard analysis,Seismic hazard assessment,Three-dimensional velocity
Indexed keywords
Acceleration maps,earthquake hazards,improving national seismic hazard map,Indonesian earthquake hazard map,seismic hazard analysis