VALIDATION OF JOKO TINGKIR SOFTWARE USING TSUNAMI IMPORTANCE

Joko Tingkir program, an application for tsunami early warning, has been utilised using real-time data processing at the Research and Development Centre, Indonesian Agency for Geophysics, Climatology and Meteorology since 2013. The program can also be used to analyse earthquake events before 2013. The aim of this study is thus to validate Joko Tingkir program for an improved performance of the Indonesian tsunami early warning system using the data recorded by at least 6 seismic stations managed by BMKG-Net where data collecting for each event is limited to only 3 minutes after origin time. The data were used to determine new tsunami parameters: the duration of rupture (Tdur), the 50 second exceed duration (T50Ex), and the dominant period (Td). Hierarchical Product Platform Realisation Method (HPPRM), which had three different phases: defining phase, modeling phase and solving phase, was used to validate the program. This study exercises records before 2014 and during 2014-2015 available at the intranet 172.19.0.13/litbang/www. For earthquakes that occurred before 2008, we make use of IRIS DMC seismic stations at http://ww.iris.edu since BMKG-Net has not yet operated. All of the data in the present study were events having magnitudes of greater than 6.5. After a conversion of quantitative data into qualitative data, the results are compared to those of tsunami importance provided by NOAA database. It was found that there is no significant differences between the results derived from the current study and the NOAA database, leading to a conclusion that the software developed is valid