Development and simultaneous determination of hypocenters and mechanisms of volcanic and non-volcanic tremors

• Project/Area Number: 25400448
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Solid earth and planetary physics
• Research Institution: Kyoto University
• Principal Investigator: NAKAMICHI HARUHISA 京都大学, 防災研究所, 准教授 (00420373)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2013: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
• Keywords: 火山現象 / 火山性微動 / 爆発地震 / 震源 / 振幅分布 / リアルタイム / トリガー機能 / 共有メモリ / 稠密地震観測 / マイグレーション / メカニズム

Outline of Final Research Achievements

We installed the real-time hypocenter determination system for volcanic earthquakes and tremor for Sakurajima. The system directory accesses the shared memory of seismic data and determines hypocenters. The detection method for the system uses time derivatives of root-mean-square amplitudes for two different time-length windows to detect volcanic earthquakes and tremors. The hypocenters of explosion earthquakes are located beneath an area around Showa crater at depths of -1 to 3 km below sea level. The hypocenters of earthquake swarm occurred in August 2015 are located beneath an area around Minamidake summit and Showa crater at depths of 2 to 8 km below sea level.

Research Products

• [Journal Article] 地球物理学的多項目観測から見た噴火過程 (2016)
  • Author(s): 中道治久・青山裕
  • Journal Title: 火山 Volume: 61 Pages: 119-154
  • Peer Reviewed / Open Access
• [Journal Article] 第８回火山都市国際会議参加報告 (2015)
  • Author(s): 中道治久・青木陽介・市原美恵・伊藤英之・上田英樹・ 大湊隆雄・佐藤泉・杉本伸一・鈴木由希・宝田晋治・土志田潔・並木敦子・前野深・松島健・萬年一剛・吉本充宏・山田大志・井口正人
  • Journal Title: 火山 Volume: 60 Pages: 47-62
  • NAID: 110009919297
  • Peer Reviewed
• [Journal Article] Hypocenter migration and crustal seismic velocity distribution observed for the inland earthquake swarms induced by the 2011 Tohoku-Oki earthquake in NE Japan: implications for crustal fluid distribution and crustal permeability (2014)
  • Author(s): Okada et al. (including Nakamichi, H)
  • Journal Title: Geofluids Volume: 15 Issue: 1-2 Pages: 293-309
  • DOI: 10.1111/gfl.12112
  • Peer Reviewed
• [Journal Article] 1888年磐梯山水蒸気爆発に関するノート－(3)1888年の水蒸気爆発論考に潜むジレンマ－ (2014)
  • Author(s): 浜口博之・植木貞人・中道治久
  • Journal Title: 火山 Volume: 59 Pages: 287-298
  • NAID: 110009900570
  • Peer Reviewed
• [Journal Article] 2013年桜島人工地震探査の概要と2008年探査との比較 (2014)
  • Author(s): 中道治久・他
  • Journal Title: 京都大学防災研究所年報 Volume: 57B Pages: 125-137
  • NAID: 120005567952
  • Open Access
• [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., Yamamoto, K., Ohkura, T., Ando, T., Onishi, K., Shimizu, H., Yamashita, Y., Nakamichi, H., Yamawaki, T., Oikawa, J., Ueki, S., Tsutsui, T., Mori, H., Nishida, M., Hiramatsu, H., Koeda, T., Masuda, K., Katou, K., Hatakeyama K. and Kobayashi, T.
  • Journal Title: Bull. Volcanol. Soc. Japan Volume: 58 Pages: 227-237
  • Peer Reviewed
• [Journal Article] AGU Fall Meeting 2012セッション報告 (2013)
  • Author(s): 中道治久
  • Journal Title: 火山 Volume: 58 Pages: 307-309
  • NAID: 110009597109
  • Peer Reviewed
• [Journal Article] Continuous long-term array analysis of seismic records observed during the 2011 Shinmoedake eruption activity of Kirishima volcano, southwest Japan (2013)
  • Author(s): Nakamichi, H., Yamanaka, Y., Terakawa, T., Horikawa, S., Okuda, T., Yamazaki, F.
  • Journal Title: Earth Planets Space Volume: 65 Issue: 6 Pages: 551-562
  • DOI: 10.5047/eps.2013.03.002
  • NAID: 10031193468
  • Peer Reviewed
• [Journal Article] Effects of pore fluid pressure and tectonic stress on diverse seismic activities around the Mt. Ontake volcano, central Japan (2013)
  • Author(s): Terakawa, T., Y. Yamanaka, H. Nakamichi, T. Watanabe, F. Yamazaki, S. Horikawa, T. Okuda
  • Journal Title: Tectonophysics Volume: 608 Pages: 138-148
  • DOI: 10.1016/j.tecto.2013.10.005
  • Peer Reviewed
• [Journal Article] Imaging the source regions of normal faulting sequences induced by the 2011 M9.0 Tohoku-Oki earthquake (2013)
  • Author(s): Kato, A., H. Takahashi et al.
  • Journal Title: Geophysical Research Letters Volume: 40 Issue: 2 Pages: 273-278
  • DOI: 10.1002/grl.50104
  • Peer Reviewed
• [Journal Article] Mechanism of small vulcanian eruptions at Suwanosejima volcano, Japan, as inferred from precursor inflations and tremor signals (2013)
  • Author(s): Nishimura, T., Iguchi, M., Yakiwara, H., Oikawa, J., Kawaguchi, R., Aoyama, H., Nakamichi, H., Ohta, Y., Tameguri, T.
  • Journal Title: Bull. Volcanol. Volume: 75 Issue: 12 Pages: 779-779
  • DOI: 10.1007/s00445-013-0779-1
  • Peer Reviewed
• [Journal Article] 桜島火山における反復地震探査(2012年観測) (2013)
  • Author(s): 筒井智樹・井口正人・為栗健・渡邊幸弘・大島弘光・植木貞人・山本希・豊国源知・野上健治・大湊隆雄・及川純・市原恵美・中道弘久・他
  • Journal Title: 京都大学防災研究所年報 Volume: 56B Pages: 207-220
  • NAID: 120005373046
• [Journal Article] 諏訪之瀬島火山における火口に近接した地震計アレイ観測-2010年10月～11月実施- (2013)
  • Author(s): 中道治久・青山裕・西村太志・八木原寛・太田雄策・横尾亮彦・井口正人
  • Journal Title: 京都大学防災研究所年報 Volume: 56B Pages: 227-235
  • NAID: 120005373044
• [Presentation] 2014年・2015年口永良部島火山噴火に伴う地震・空振の比較 (2015)
  • Author(s): 中道治久・井口正人・為栗健・園田忠臣
  • Organizer: 日本火山学会秋季大会
  • Place of Presentation: 富山大学五福キャンパス
  • Year and Date: 2015-09-28
• [Presentation] Characterizing magma storage at Aira Caldera and Sakurajima Volcano, Japan, from geodetic inversions (2014)
  • Author(s): Hickey, J., Gottsmann, J., Iguchi, M., Nakamichi, H.
  • Organizer: AGU Fall meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2014-12-15 – 2014-12-19
• [Presentation] 2014年ケルート火山噴火に先行した地震のエネルギー放出量 (2014)
  • Author(s): 中道治久・井口正人・ヘティトリアスティ・ムハンマドヘンドラスト・イアンムルヤナ
  • Organizer: 日本火山学会秋季大会
  • Place of Presentation: 福岡市
  • Year and Date: 2014-11-01 – 2014-11-04
• [Presentation] 1888年磐梯山水蒸気爆発（７）“磐梯式噴火”の新しい解釈 (2014)
  • Author(s): 浜口博之・中道治久・植木貞人
  • Organizer: 日本火山学会秋季大会
  • Place of Presentation: 福岡市
  • Year and Date: 2014-11-01 – 2014-11-04
• [Presentation] 2011年霧島新燃岳の噴火に伴って発生した火山性微動の時空間変化 (2014)
  • Author(s): 中元真美・松本聡・山中佳子・清水洋・中道治久・市原美恵・及川純
  • Organizer: 日本火山学会秋季大会
  • Place of Presentation: 福岡市
  • Year and Date: 2014-11-01 – 2014-11-04
• [Presentation] 2014年8月口永良部島火山噴火発生までの火山活動 (2014)
  • Author(s): 井口正人・中道治久・為栗健・山本圭吾
  • Organizer: 日本火山学会秋季大会
  • Place of Presentation: 福岡市
  • Year and Date: 2014-11-01 – 2014-11-04
• [Presentation] 2014年御嶽山水蒸気爆発；過熱水ジェットの危機的噴出 (2014)
  • Author(s): 浜口博之・中道治久
  • Organizer: 日本火山学会秋季大会
  • Place of Presentation: 福岡市
  • Year and Date: 2014-11-01 – 2014-11-04
• [Presentation] Seismic activity prior the 2014 eruption of Kelud volcano, east Java, Indonesia comparison with the 2007 eruption (2014)
  • Author(s): Nakamichi, H., Iguchi, M., Triastuty, H., Hendrasto, M., Mulyana, I.
  • Organizer: Cities on Volcanoes 8
  • Place of Presentation: Yogyakarta, Indonesia
  • Year and Date: 2014-09-09 – 2014-09-13
• [Presentation] Waveform analysis of explosion earthquake at Lokon-Empung volcano and comparative study of dilatational phase of Vulcanian eruption (2014)
  • Author(s): Yamada, T., Aoyama, H., Nishimura, T., Yakiwara, H., Nakamichi, H., Oikawa, J., Iguchi, M., Hendrasto, M., Suparman, Y.
  • Organizer: Cities on Volcanoes 8
  • Place of Presentation: Yogyakarta, Indonesia
  • Year and Date: 2014-09-09 – 2014-09-13
• [Presentation] 011年霧島火山の噴火に伴って発生した火山性微動の時空間的特徴 (2014)
  • Author(s): 中元真美・松本聡・山中佳子・清水洋・中道治久・市原美恵・及川純
  • Organizer: 地球惑星科学連合大会
  • Place of Presentation: 横浜市
  • Year and Date: 2014-04-28 – 2014-05-02
• [Presentation] 桜島火山における反復地震探査（2013年） (2014)
  • Author(s): 筒井智樹・井口正人・中道治久・為栗健・他
  • Organizer: 地球惑星科学連合大会
  • Place of Presentation: 横浜市
  • Year and Date: 2014-04-28 – 2014-05-02
• [Presentation] 2013年桜島人工地震探査の概要と2008年実施探査との比較 (2014)
  • Author(s): 中道治久・筒井智樹・為栗健・井口正人・八木原寛・大湊隆雄・他
  • Organizer: 地球惑星科学連合大会
  • Place of Presentation: 横浜市
  • Year and Date: 2014-04-28 – 2014-05-02
• [Presentation] ロコン火山における爆発地震の初動部分の解析 (2014)
  • Author(s): 山田大志・青山裕・西村太志・八木原寛・中道治久・及川純・井口正人・他
  • Organizer: 地球惑星科学連合大会
  • Place of Presentation: 横浜市
  • Year and Date: 2014-04-28 – 2014-05-02
• [Presentation] 2013 年桜島人工地震探査の概要と2008年実施探査との比較 (2014)
  • Author(s): 中道治久・他39名
  • Organizer: 地球惑星科学連合大会2014
  • Place of Presentation: 横浜市 パシフィコ横浜
• [Presentation] A physical model for the phreatic explosion on July 15, 1888 at Bandai volcano, northeastern Japan (2013)
  • Author(s): Hamaguchi, H., Ueki, S., Nakamichi, H.
  • Organizer: IAVCEI 2013 General Assembly
  • Place of Presentation: 鹿児島市 かごしま県民交流センター
• [Presentation] Evolution of seismic reflectors beneath Sakurajima volcano after 2008, revealed through the rounds of controlled source seismic experiments (2013)
  • Author(s): Tsutsui, T., Iguchi, M., Tameguri, T., Oshima, H., Ueki, S., Nogami, K., Ohminato, T., Ichihara, M., Oikawa, J., Nakamichi, H., Ohkura, T., Shimizu, H., Miyamachi, H., Yakiwara, H., Matsusue, S.
  • Organizer: IAVCEI 2013 General Assembly
  • Place of Presentation: 鹿児島市 かごしま県民交流センター
• [Presentation] Spatio-temporal variations of the volcanic tremors during 2011 Kirishima eruption estimated by dense seismic array (2013)
  • Author(s): Nakamoto, M., Matsumoto, S., Yamanaka, Y., Shimizu, H., Nakamichi, H.
  • Organizer: IAVCEI 2013 General Assembly
  • Place of Presentation: 鹿児島市 かごしま県民交流センター
• [Presentation] Detection and location of weak continuous tremor episodes using a seismic array during the 2011 Shinmoedake eruption activity of Kirishima volcano, southwest Japan (2013)
  • Author(s): Nakamichi, H., Yamanaka, Y., Terakawa, T., Horikawa, S., Okuda, T., Yamazaki, F.
  • Organizer: IAVCEI 2013 General Assembly
  • Place of Presentation: 鹿児島市 かごしま県民交流センター
• [Presentation] Seismic and geodetic precursors of small vulcanian eruptions at Suwanose-jima volcano, Japan (2013)
  • Author(s): Nishimura, T., Iguchi, M., Yakiwara, H., Oikawa, J., Hirai, Y., Aoyama, H., Nakamichi, H., Kawaguchi, R., Ohta, Y., Tamaguri, T.
  • Organizer: IAVCEI 2013 General Assembly
  • Place of Presentation: 鹿児島市 かごしま県民交流センター
• [Presentation] Seismic and tilt observation of vulcanian explosions at Lokon-Empung volcano, northern Sulawesi, Indonesia (2013)
  • Author(s): Yamada, T., Aoyama, H., Nishimura, T., Yakiwara, H., Nakamichi, H., Oikawa, J., Iguchi, M., Hendrasto, M., Suparman, Y.
  • Organizer: IAVCEI 2013 General Assembly
  • Place of Presentation: 鹿児島市 かごしま県民交流センター
• [Presentation] Hazard mitigation from Sakurajima Volcano through the coordinating committee and communication with the public (2013)
  • Author(s): Nakamichi, H. Iguchi, M.
  • Organizer: Volcano Observatory Best Practice (VOBP2); communicating hazards
  • Place of Presentation: Erice, Sicily, Italy
  • Invited
• [Presentation] Observations from a dense infrasound sensor network on Sakurajima volcano, Japan: a benchmark dataset for the volcano acoustics community (2013)
  • Author(s): Fee, D., Yokoo, A., Johnson, J., Rowell, C., McKee, K., Matoza, R., Swanson, E., Iguchi, M., Nakamichi, H.
  • Organizer: AGU Fall Meeting 2013
  • Place of Presentation: San Francisco, USA
• [Presentation] Effects of pore fluid pressure and tectonic stress on diverse seismic activities around the Mt. Ontake volcano, central Japan (2013)
  • Author(s): Terakawa, T., Yamanaka, Y., Nakamichi, H., Watanabe, T., Yamazaki, F., Horikawa, S., Okuda, T.
  • Organizer: AGU Fall Meeting 2013
  • Place of Presentation: San Francisco, USA
• [Presentation] Activities and source mechanisms of volcanic deep low-frequency earthquakes and its implication for deep crustal process in magmatic arc (2013)
  • Author(s): Nakamichi, H.
  • Organizer: AGU Fall Meeting 2013
  • Place of Presentation: San Francisco, USA
  • Invited
• [Presentation] 御嶽山周辺の群発地震域におけるVp/Vsの推定 (2013)
  • Author(s): 大藪竜童・山中佳子・中道治久
  • Organizer: 地球惑星科学連合大会2013
  • Place of Presentation: 千葉市 幕張メッセ国際会議場
• [Presentation] 桜島火山における反復地震探査（第４回目） (2013)
  • Author(s): 筒井智樹・井口正人・為栗健・渡邊幸弘・大島弘光・植木貞人・山本希・豊国源知・野上健治・大湊隆雄・及川純・市原美恵・中道治久・大倉敬宏・清水洋・宮町宏樹・八木原寛・園田忠臣・高山鐵朗・渡邉篤志・堀川信一郎・吉川慎・平野舟一郎・加藤幸司・池田啓二・松末伸一・芥川真由美・小窪則夫・宇都宮真吾・中橋正樹
  • Organizer: 地球惑星科学連合大会2013
  • Place of Presentation: 千葉市 幕張メッセ国際会議場
• [Presentation] 地震計アレイによる霧島山新燃岳周辺で発生した火山性微動の発生源の時空間変化 (2013)
  • Author(s): 中元真美・松本聡・山中佳子・清水洋・中道治久
  • Organizer: 地球惑星科学連合大会2013
  • Place of Presentation: 千葉市 幕張メッセ国際会議場
• [Presentation] ロコン火山（インドネシア）のブルカノ式噴火に伴う爆発地震の波動特性と前兆傾斜変動 (2013)
  • Author(s): 青山裕・山田大志・西村太志・八木原寛・中道治久・及川純・井口正人・Hendrasto Muhamad, Suparman Yasa
  • Organizer: 地球惑星科学連合大会2013
  • Place of Presentation: 千葉市 幕張メッセ国際会議場
• [Presentation] 1888年磐梯山水蒸気爆発（６）熱力学モデルの検討 (2013)
  • Author(s): 浜口博之・中道治久・植木貞人
  • Organizer: 火山学会秋季大会
  • Place of Presentation: 福島県猪苗代町 猪苗代町体験交流館
• [Presentation] インドネシア・ロコン火山における爆発地震の発震機構の解析 (2013)
  • Author(s): 山田大志・青山裕・西村太志・八木原寛・中道治久・井口正人・及川純・Hendrasto Muhamad・Suparman Yasa
  • Organizer: 火山学会秋季大会
  • Place of Presentation: 福島県猪苗代町 猪苗代町体験交流館
• [Presentation] 井口正人・中道治久・藤田正治・吉谷純一・中田節也・宮本邦明 (2013)
  • Author(s): 井口正人・中道治久・藤田正治・吉谷純一・中田節也・宮本邦明
  • Organizer: 火山学会秋季大会
  • Place of Presentation: 福島県猪苗代町 猪苗代町体験交流館
• [Presentation] A multi-array infrasound study of Sakurajima volcano (2013)
  • Author(s): Swanson, E., Yokoo, A., Nakamichi, H., Iguchi, M., Green, D., Phillips, J., Rust, A.
  • Organizer: 火山学会秋季大会
  • Place of Presentation: 福島県猪苗代町 猪苗代町体験交流館
• [Presentation] 反射法探査データを用いた昭和火口の爆発地震のアレイ解析 (2013)
  • Author(s): 中道治久・筒井智樹・井口正人・為栗健・桜島反復反射法探査グループ
  • Organizer: 火山学会秋季大会
  • Place of Presentation: 福島県猪苗代町 猪苗代町体験交流館