Study of detection of dynamic change of magma transport process by using ACROSS and its cause, in Sakurajima volcano

2013 Fiscal Year Final Research Report

• Project/Area Number: 23340130
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Solid earth and planetary physics
• Research Institution: Kagoshima University
• Principal Investigator: MIYAMACHI Hiroki 鹿児島大学, 理工学研究科, 教授 (30182041)
• Co-Investigator(Kenkyū-buntansha): YAMAOKA Koshun 名古屋大学, 環境学研究科, 教授 (70183118) ; WATANABE Toshiki 名古屋大学, 環境学研究科, 教授 (50210935) ; IGUCHI Masato 京都大学, 防災研究所, 教授 (60144391) ; TAMEGURI Takeshi 京都大学, 防災研究所, 助教 (70335222) ; MIKADA Hitoshi 京都大学, 工学(系)研究科(研究院), 教授 (10239197) ; YAKIWARA Hiroshi 鹿児島大学, 理工学研究科, 助教 (60295235) ; SHIMIZU Hiroshi 九州大学, 理学(系)研究科(研究院), 教授 (50178985) ; TAKENAKA Hiroshi 岡山大学, 自然科学研究科, 教授 (30253397)
• Project Period (FY): 2011-04-01 – 2014-03-31
• Keywords: 火山 / 桜島 / アクロス / 伝達関数 / マグマ

Research Abstract

In order to monitor quantitatively magma transport process in Sakurajima volcano, the ACROSS system composed of two vibration sources was deployed in Sakurajima Island, and the system produced continuously the accurately controlled imperceptible elastic wave signal from 5 to 15 Hz. The signal from the ACROSS is routinely monitored by 15 permanent stations and 4 temporal stations in Sakurajima volcano. We successfully observed the ACROSS signal at each station and could detect temporal variation of the transfer function (TF). Because the temporal variation of later phases in the TF was obviously larger than that in the early phases, we inferred that the temporal variation of the later phases reflected the temporal change of the structure in deep regions beneath Sakurajima volcano. We also found that the temporal variation of the TF is correlated with volcanic activity such as the daily volcanic eruptions and crustal deformation in Sakurajima Island.

Research Products

• [Journal Article] Active Monitoring at an Active Volcano -1 Amplitude-distance Dependence of ACROSS at Sakurajima Volcano (2014)
  • Author(s): Yamaoka, K., Miyamachi, H., Watanabe, T., Kunitomo, T., Michishita, T., Ikuta, R. and Iguchi, M
  • Journal Title: Japan, Earth, Planets and Space Volume: 66 Pages: 32
  • DOI: 10.1186/1880-5981-66-32
  • Peer Reviewed
• [Journal Article] Shallow velocity structure beneath the Aira caldera and Sakurajima volcano as inferred from refraction analysis of the seismic experiment in 2008 (2013)
  • Author(s): Miyamachi, H., Tomari, C., Yakiwara, H., Iguchi, M., Tameguri, T., et al
  • Journal Title: Bull. Volcanol. Soc. Japan Volume: 58, No.1 Pages: 227-237
  • Peer Reviewed
• [Journal Article] Structure of northeastern Sakurajima, south Kyushu, Japan, revealed by seismic reflection survey (2013)
  • Author(s): Tsutsui, T., Yagi, N., Tsushima, K., Iguchi, M., Tameguri, T., Mikada, H., Onishi, K. Miyamachi, H., Nishimura, T., Morita, Y. and Watanabe, A
  • Journal Title: Bull. Volcanol. Soc. Japan Volume: 58, No.1 Pages: 239-250
  • Peer Reviewed
• [Journal Article] Seismic velocity structure of the crust beneath the Aira caldera in southern Kyushu by tomography of travel times of local earthquake data (2012)
  • Author(s): Alanis, P.K., Miyamachi H., Yakiwara, H., Goto, K., Kobayashi, R., Tameguri, T. and Iguchi, M
  • Journal Title: Bull. Volcanol. Soc. Japan Volume: 27, No.4 Pages: 227-234
  • Peer Reviewed
• [Presentation] ctive monitoring by using ACROSS in Sakurajima volcano - observation report 3- (2014)
  • Author(s): Miyamachi H., Arikado N., Yakiwara H., Yamaoka K., Watanabe T., Kunitomo T., Iguchi M., Tameguri T., Mikada H., Takenaka H., Shimizu H. and Ikuta, R
  • Organizer: 日本地球惑星科学連合 2014年大会
  • Place of Presentation: 神奈川県横浜市
  • Year and Date: 2014-05-01
• [Presentation] 桜島火山における ACROSS 震源位置で励起された弾性波の伝播シミュレーション (2013)
  • Author(s): 竹中博士・藤岡慧・中村武史・岡元太郎・宮町宏樹・八木原寛・山岡耕春・國友孝洋・渡辺俊樹・井口正人・為栗健・三ヶ田均・清水洋
  • Organizer: 日本火山学会 2013年度秋季大会
  • Place of Presentation: 福島県猪苗代町
  • Year and Date: 2013-10-01
• [Presentation] Tomographic image of the crust beneath the Aira caldera in southern Kyushu (2013)
  • Author(s): Miyamachi, H., Alanis, P.K., Yakiwara, H., Tameguri, T. and Iguchi, M
  • Organizer: IAVCEI 2013 Scientific Assembly
  • Place of Presentation: Kagoshima, Japan
  • Year and Date: 2013-07-24
• [Presentation] Active monitoring at active Volcanoes -Monitoring temporal change of transfer function in Sakurajima volcano (2013)
  • Author(s): Miyamachi, H., Yamaoka, K., Iguchi, M., Yakiwara, H., Kunitomo, T., Watanabe, T. and Ikuta, T
  • Organizer: Japan, IAVCEI 2013 Scientific Assembly
  • Place of Presentation: Kagoshima, Japan
  • Year and Date: 2013-07-24
• [Presentation] Active monitoring at Active Volcano - Performance of ACROSS at Sakurajima volcano (2013)
  • Author(s): Yamaoka, K., Miyamachi, H., Iguchi, M., Watanabe, T., Kunitomo, T., Yakiwara, H. and Ikuta, R
  • Organizer: Japan, IAVCEI 2013 Scientific Assembly
  • Place of Presentation: Kagoshima, Japan
  • Year and Date: 2013-07-24
• [Presentation] 桜島火山おけるアクロスを用いた能動的モニタリング-観測報告 2- (2013)
  • Author(s): 宮町宏樹・八木原寛・山岡耕春・渡辺俊樹・國友孝洋・井口正人・為栗健・三ケ田均・清水洋・竹中博士・生田領野
  • Organizer: 日本地球惑星科学連合 2013年大会
  • Place of Presentation: 千葉県千葉市
  • Year and Date: 2013-05-19
• [Presentation] ACROSS を用いた桜島における能動監視 (2012)
  • Author(s): 宮町宏樹・八木原寛・山岡耕春・渡辺俊樹・國友孝洋・井口正人・為栗健・三ケ田均・清水洋・松島健・竹中博士
  • Organizer: 日本火山学会2012年度秋期大会
  • Place of Presentation: 長野県御代田町
  • Year and Date: 2012-10-15
• [Presentation] 活火山における能動監視 -桜島火山へのアクロス設置- (2012)
  • Author(s): 山岡耕春・渡辺俊樹・井口正人・為栗健・八木原寛・三ケ田均・竹中博士・清水洋・宮町宏樹
  • Organizer: 日本地球惑星科学連合 2012年大会
  • Place of Presentation: 千葉県千葉市
  • Year and Date: 2012-05-24
• [Presentation] アクロスによる桜島火山のマグマ移動検出に向けた能動的アプローチ (2011)
  • Author(s): 宮町宏樹・井口正人・山岡耕春・渡辺俊樹・八木原寛・為栗健・三ケ田均・竹中博士・清水洋
  • Organizer: 日本火山学会 2011年度秋期大会
  • Place of Presentation: 北海道旭川市
  • Year and Date: 2011-10-03
• [Presentation] 桜島における ACROSS 観測可能性の検討 (2011)
  • Author(s): 山岡耕春・渡辺俊樹・宮町宏樹・井口正人
  • Organizer: 日本火山学会 2011年度秋期大会
  • Place of Presentation: 北海道旭川市
  • Year and Date: 2011-10-03