Development of a Web-GIS based decision support system for earthquake warning service in Vietnam

Abstract

This paper describes the development of a Decision support system (DSS) for earthquake warning service in Vietnam using Web GTS technology. The system consists of two main components: (1) an on-line database of earth­quakes recorded from the national seismic network of Vietnam, and (2) a set of tools for rapid seismic hazard as­ sessment. Using an on-line earthquake database, the system allows creating a shake map caused by a newly recorded earthquake. In addition, the Web GIS environment allows any user, including non-professional to get useful information about a just-occurred event and the possible impact caused by the earthquake shortly after its occurrence. A fault-source model developed for Vietnam was used as a part of the hazard calculation and mapping procedure. All information and results obtained from the systemn are automatically included in the earthquake bulletins, which will be disseminate national wide afterward by the Vietnam earthquake information and tsunami warning Center. The shake maps produced by the DSS in terms of both Peak Ground Acceleration and intensity values are rapidly available via the Web and can be used for emergency response, public infomation, loss estimation, earthquake plan­ning, and post-earthquake engineering and scientific analyses. Application of the on-line decision support system in earthquake warning service can mitigate the earthquake risk and reduce the losses and damages due to earthquakes in Vietnam in future.