Eruption Pattern and a Long-Term Magma Discharge Rate over the Past 100 Years at Kelud Volcano, Indonesia
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- Maeno Fukashi
- Earthquake Research Institute, The University of Tokyo
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- Nakada Setsuya
- Earthquake Research Institute, The University of Tokyo National Research Institute for Earth Science and Disaster Resilience
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- Yoshimoto Mitsuhiro
- Mount Fuji Research Institute, Yamanashi Prefectural Government
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- Shimano Taketo
- Graduate School of Environmental and Disaster Research, Tokoha University
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- Hokanishi Natsumi
- Earthquake Research Institute, The University of Tokyo
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- Zaennudin Akhmad
- Centre for Volcanology and Geological Hazard Mitigation
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- Iguchi Masato
- Sakurajima Volcano Research Center, Disaster Prevention Research Institute, Kyoto University
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抄録
<p>Kelud Volcano is among the most active volcanoes in Indonesia, with repeated explosive eruptions throughout its history. Here, we reconstructed the relationship between the repose period and the cumulative volume of erupted material over the past 100 years and estimated the long-term magma discharge rate and future eruptive potential and hazards. Tephra data and eruption sequences described in historical documents were used to estimate the volume and mass discharge rate. The volumes of the 1901, 1919, 1951, 1966, 1990, and 2014 eruptions were estimated as 51–296 × 106 m3. The mass discharge rates were estimated to be on the order of 107 kg/s for the 1919, 1951, and 2014 eruptions and the order of 106 kg/s for the 1966 and 1990 eruptions. Based on a linear relationship between the repose period and cumulative erupted mass, the long-term mass discharge rate was estimated as ∼ 1.5 × 1010 kg/year, explaining the features of the larger eruptions (1919, 1951, and 2014) but not those of the smaller eruptions (1966 and 1990). This estimate is relatively high compared to other typical basaltic-andesitic subduction-zone volcanoes. This result provides important insights into the evolution of magmatic systems and prediction of future eruptions at Kelud Volcano.</p>
収録刊行物
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- Journal of Disaster Research
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Journal of Disaster Research 14 (1), 27-39, 2019-02-01
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