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研究紹介

Chiba University. 研究紹介. Research introductions. ヨサファット テトォコ スリ スマンティヨ. Josaphat Tetuko Sri Sumantyo. 千葉大学大学院自然科学研究科像科学専攻. Graduate School of Science and Technology, Chiba University. クラカトア山島群. Situation map. SAR mosaic. Sumatera island. Indonesia. N. Lampung. Lampung bay.

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研究紹介

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  1. Chiba University 研究紹介 Research introductions ヨサファット テトォコ スリ スマンティヨ Josaphat Tetuko Sri Sumantyo 千葉大学大学院自然科学研究科像科学専攻 Graduate School of Science and Technology, Chiba University

  2. クラカトア山島群 Situation map SAR mosaic Sumatera island Indonesia N Lampung Lampung bay Legundi island Sertung island Panjang island Rakata island Banten Krakatau volcano complex Sunda strait Panaitan island Java island 0 15 km Volcanoes in Indonesia : 129 volcanoes Sumatera : 12 Java : 21 Bali : 2 Nusa Tenggara : 20 Banda sea : 9 North Sulawesi : 6 Sangihe : 5 Halmahera : 5 Krakatau volcano complex (ESDM, Indonesia)

  3. 歴史：クラカトア山島群の誕生 ② Rakata ① ③ Rakata Panjang Panjang caldera before 1883 Danan Perbuwatan Sertung sertung growing up of Rakata, Danan and Perbuwatan volcanoes 17th century after gigantic eruption with the lost of volcano dome in 60,000 years ago ancient Krakatau 60,000 years ago North Rakata Rakata ⑥ ④ ⑤ Rakata Panjang Panjang Anak krakatau Panjang Danan caldera after 1883 Perbuwatan Sertung Sertung Sertung Rakata, Danan and Perbuwatan volcanoes activities stopped in 1681. paroxymal explotion of Danan and Perbuwatan volcanoes on August 27, 1883 → 36,417 people killed and swept 295 villages Krakatau volcano complex growing slowly nowadays and always create spectacular history …

  4. 歴史：クラカトア山島群の誕生 Anak Krakatau Photographs : ESDM, Indonesia

  5. 合成開口レーダ画像生成過程 Range JERS-1 satellite Azimuth North range compressed image raw data North sensor illumination azimuth compressed image rotated image

  6. 合成開口レーダ画像生成過程 North Panjang island North Sertung island Anak Krakatau island Rakata island Subset of JERS-1 SAR 19980731 Full scene of JERS-1 SAR 19980731

  7. クラカトア山島群地質図とＳＡＲ画像の関係 N Panjang island Sertung island Anak Krakatau island Rakata island JERS-1 SAR 19980731 N Sertung island Map legend Panjang island Lav Lavas in 1963, 1972, 1975, 1980 Pca1 Pyroclastic airfall layer of ash, scoriaeous lapilli, sand exposed in 1982. Pca2 Pyroclastic airfall layer of ash, scoreae, lapilli, sand exposed in 1956. Smd Material deposit of the rock such as silt, sand or block size, andesites, basaltic andesite, and obsidian fragments Anak Krakatau island Hal Hyperstene augite andesite lava Rakata island Pf 1883 Pyroclastic flow Bal Basaltic lava Roc1 Rock distribution Roc2 Estimated rock distribution Landsat TM 19920518

  8. クラカトア山島群地質図とＳＡＲ画像の関係 N N Sertung island Panjang island Panjang island Sertung island Anak Krakatau island Anak Krakatau island Rakata island Rakata island JERS-1 SAR 19980731 Landsat TM 19920518 Geological cross section

  9. North 19941105 19961122 19980913 19961122 composited SAR images 0 2 km クラカトア火山活動 19941105 19980913

  10. B 2000m Pre-1883 Krakatau 1500m Pre-historic Krakatau Rakata island Sertung island 1000m Bal Hal 500m Pf 1883 Pf 1883 Hal Sea level 0m A B 後方散乱係数の見方 A

  11. 後方散乱係数の見方 C D Pre-historic Krakatau 1000m Panjang island Pre-historic Krakatau Anak Krakatau island 750m Sertung island Hal Hal Pf 1883 Pca1 500m Pca2 Lav 1972/1973 Pca2 Pf 1883 Smd 250m Sea level Sea level 0m C D

  12. 後方散乱係数の見方 F E 1000m Panjang island Pre-historic Krakatau 750m Anak Krakatau island Hal Pf 1883 500m Pca1 Pca2 Lav 1972/1973 Pca2 Smd 250m Sea level 0m E F

  13. 19941105 19961122 19980913 後方散乱係数と火山活動の関係 #1 5 dB 4 dB

  14. 19941105 19961122 19980913 後方散乱係数と火山活動の関係 #2

  15. 19941105 19961122 19980913 後方散乱係数と火山活動の関係 #3 7 dB 5 dB

  16. 19941105 19961122 19980913 後方散乱係数と火山活動の関係 #4 5 dB 3 dB

  17. 後方散乱係数と火山活動の関係 Backscattering coefficient of each soil type Radar respons / backscattering coefficient of new lava around Anak Krakatau Volcano Northern area : 5 ~ 7 dB increased Western area : 4 ~ 5 dB increased North-eastern area : 3 ~ 5 dB increased

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