Thursday 25 August 2005

G6
1330-1530 hours

398
Volcano deformation monitoring in Indonesia : status, limitations and prospects
Abidin, Hasanuddin Zainal¹, Andreas, Heri¹, Gamal, Muhammad¹, Hendrasto, Muhammad², Suganda, Ony K², Kusuma, Mipi A¹, Purbawinata, Mas A², Kimata, Fumiaki³, Irwan, Meilano³
1 Department of Geodetic Engineering, Institute Of Technology Bandung, Bandung, Indonesia
2 Directorate of Vulcanology and Geological Hazard Mitigation, Bandung, Indonesia
3 Research Center for Seismology and Volcanology and Disaster Mitigation (RCSVDM), Nagoya University, Japan
Author email: hzabidin@indo.net.id
Indonesia has 129 active volcanoes. With the people of around 200 million and the fact that most populated island in Indonesia (i.e. Java) has the most number of active volcanoes then it is obvious that the Indonesian people are always live under threat of volcanic eruptions. Monitoring the volcanic activities can be done by using several methods, which one of them is the deformation method. In Indonesia, volcano deformation has been monitored using Tiltmeter observation, EDM measurement, Leveling Survey and Repeated and Continuous GPS Survey techniques. This paper will describe and discuss the implementation status of those techniques for deformation monitoring of the Indonesian volcanoes along with their limitations and prospects. The obtained results and experiences will be presented along the discussions. Special emphasis will be given to the results and experiences obtained from GPS surveys that have been conducted in six volcanoes, e.g. Guntur, Papandayan, Galunggung, Kelut, Bromo and Batur. The prospect of using InSAR technique will also be elaborated. The paper will be sum up with some conclusions and recommendations.

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