Land subsidence severely threatens most of the coastal plains around the world where high productive industrial and agricultural activities and urban centers are concentrated.Coastal subsidence damages infrastructures and exacerbates the effect of the sea-level rise at regional scale.Although it is a well-known process,there is still much more to be improved on the monitoring,mapping and modeling of ground movements,as well as the understanding of controlling mechanisms.The Intational Geoscience Programme recently approved an intational project (IGCP 663) aiming to bring together worldwide researchers to share expertise on subsidence processes typically occurring in coastal areas and cities,including basic research,monitoring and observation,modelling and management.In this paper,we provide the research communities and potential stakeholders with the basic information to join the participating teams in developing this project.Specifically,major advances on coastal subsidence studies and information on well-known and new case studies of land subsidence in China,Italy,The Netherlands,Indonesia,Vietnam and Thailand are highlighted and summarized.Meanwhile,the networking,dissemination,annual meeting and field trip are briefly introduced.