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JDR Vol.7 No.1 pp. 26-36
(2012)
doi: 10.20965/jdr.2012.p0026

Paper:

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Methods for Eruption Prediction and Hazard Evaluation at Indonesian Volcanoes

Masato Iguchi*1, Surono*2, Takeshi Nishimura*3,
Muhamad Hendrasto*2, Umar Rosadi*2,
Takahiro Ohkura*4, Hetty Triastuty*2,
Ahmad Basuki*2, Agoes Loeqman*2,
Sukir Maryanto*5, Kazuhiro Ishihara*1,
Mitsuhiro Yoshimoto*6, Setsuya Nakada*7,
and Natsumi Hokanishi*7

*1Disaster Prevention Research Institute, Kyoto University, Sakurajima-Yokoyama, Kagoshima 891-1419, Japan

*2Center for Volcanology and Geological Hazard Mitigation Jl. Diponegoro 57, Bandung 40122, Indonesia

*3Graduate School of Science, Tohoku University, Japan

*4Graduate School of Science, Kyoto University, Japan

*5Faculty of Science, Brawijaya University, Indonesia

*6Graduate School of Science, Hokkaido University, Japan

*7Earthquake Research Institute, University of Tokyo, Japan

Received:
August 1, 2011
Accepted:
January 14, 2012
Published:
January 1, 2012
Creative Commons License
Keywords:
short-term prediction, long-term prediction, eruption scenario
Abstract
We report methods, based on geophysical observations and geological surveys, for the prediction of eruptions and the evaluation of the activity of 4 volcanoes in Indonesia. These are Semeru, Guntur, Kelud and Sinabung volcanoes. Minor increases in tilt were detected by borehole tiltmeters prior to eruptions at the Semeru volcano depending on the seismic amplitude of explosion earthquakes. The results show the possibility of prediction of the type and magnitude of eruption and the effectiveness of observation with a high signalto-noise ratio. The establishment of background data is important for evaluating volcanic activity in longterm prediction. Typical distributions of volcanic and local tectonic earthquakes were obtained around the Guntur volcano, where geodetic monitoring by continuous GPS observation is valuable. The cumulative volume of eruptive products is valuable for evaluating the potential for future eruption. The eruptive rate of the Kelud volcano is ca 2×106 m3/y (dense rock equivalent), but the volume of the 2007 eruption was only 2×107 m3, suggesting a still high potential for eruption. Based on geological surveys and dating, an eruption scenario is proposed for the activity of Mt. Sinabung, where phreatic eruptions occurred in 2010 after a historically long dormancy.
Cite this article as:
M. Iguchi, Surono, T. Nishimura, M. Hendrasto, U. Rosadi, T. Ohkura, H. Triastuty, A. Basuki, A. Loeqman, S. Maryanto, K. Ishihara, M. Yoshimoto, S. Nakada, and N. Hokanishi, “Methods for Eruption Prediction and Hazard Evaluation at Indonesian Volcanoes,” J. Disaster Res., Vol.7 No.1, pp. 26-36, 2012.
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