Ambient seismic wavefield: Atmosphere-Ocean-Solid Earth Coupling

• Project/Area Number: 26400448
• 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: The University of Tokyo
• Principal Investigator: Nishida Kiwamu 東京大学, 地震研究所, 准教授 (10345176)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 常時地球自由振動 / 海洋波浪 / 海洋外部重力波 / 脈動 / 地球自由振動 / 海洋重力波

Outline of Final Research Achievements

We analyzed globally distributed 700 broad band seismometers, and revealed the source characteristics of seismic hum. In a period from 10 to 200 s, seismic hum was excited through a topographic coupling between external ocean wave and seismic waves, whereas in a period longer than 200 s, atmospheric and/or ocean disturbances could also contribute the excitation. Moreover we inferred source distribution by analyzing body-wave microseisms with period shorter than 10 s. Based on all the observations, we showed the excitation mechanisms comprehensively.

Research Products

• [Journal Article] Ambient seismic wave field (2017)
  • Author(s): NISHIDA Kiwamu
  • Journal Title: Proceedings of the Japan Academy, Series B Volume: 93 Issue: 7 Pages: 423-448
  • DOI: 10.2183/pjab.93.026
  • NAID: 130005881875
  • ISSN: 0386-2208, 1349-2896
  • Peer Reviewed / Open Access
• [Journal Article] Ambient seismic wave field (2017)
  • Author(s): Kiwamu Nishida
  • Journal Title: Proceedings of the Japan Academy, Series B Volume: 印刷中
  • NAID: 130005881875
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Teleseismic S wave microseisms (2016)
  • Author(s): Kiwamu Nishida and Ryota Takagi
  • Journal Title: Science Volume: 353 Issue: 6302 Pages: 919-921
  • DOI: 10.1126/science.aaf7573
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Reconstruction of a 2D seismic wavefield by seismic gradiometry (2016)
  • Author(s): Maeda, T., K. Nishida, R. Takagi, and K. Obara
  • Journal Title: Prog. Earth Planet. Sci. Volume: 3 Issue: 1 Pages: 31-31
  • DOI: 10.1186/s40645-016-0107-4
  • Peer Reviewed / Open Access
• [Journal Article] Real-time infrasonic monitoring of the eruption at a remote island volcano using seismoacoustic cross correlation (2016)
  • Author(s): Kiwamu Nishida, and Mie Ichihara
  • Journal Title: Geophys. J. Int. Volume: 204 Issue: 2 Pages: 748-752
  • DOI: 10.1093/gji/ggv478
  • Peer Reviewed
• [Journal Article] A Single Bit Matters: Coherent Noise of Seismic Data Loggers (2015)
  • Author(s): Ryota Takagi, Kiwamu Nishida, Yosuke Aoki, Takuto Maeda, Komei Masuda, Minoru Takeo, Kazushige Obara, Katsuhiko Shiomi, Minemori Sato, Kazuo Saito
  • Journal Title: Seismological Research Letters Volume: 86 Issue: 3 Pages: 901-907
  • DOI: 10.1785/0220150030
  • Peer Reviewed
• [Journal Article] Background Lamb waves in the Earth's atmosphere (2014)
  • Author(s): Background Lamb waves in the Earth's atmosphere
  • Journal Title: Geophys. J. Int. Volume: 196 Issue: 1 Pages: 312-316
  • DOI: 10.1093/gji/ggt413
  • Peer Reviewed / Open Access
• [Journal Article] Source spectra of seismic hum (2014)
  • Author(s): Kiwamu Nishida
  • Journal Title: Geophysical Journal International Volume: 199 Issue: 1 Pages: 416-429
  • DOI: 10.1093/gji/ggu272
  • Peer Reviewed
• [Journal Article] Source characteristics of ocean infragravity waves in the Philippine Sea: Analysis of three-year continuous network records of seafloor motion and pressure (2014)
  • Author(s): Yoko Tono, Kiwamu Nishida, Yoshio Fukao, Akiko To, Narumi Takahashi
  • Journal Title: Earth Planets and Space Volume: 66 Issue: 1 Pages: 1-8
  • DOI: 10.1186/1880-5981-66-99
  • Peer Reviewed / Open Access
• [Journal Article] Estimation of azimuthal anisotropy in the NW Pacific from seismic ambient noise in seafloor records (2014)
  • Author(s): Akiko Takeo, Donald W. Forsyth, Dayanthie S. Weeraratne and Kiwamu Nishida
  • Journal Title: Geophysical Journal International Volume: 199 Issue: 1 Pages: 11-22
  • DOI: 10.1093/gji/ggu240
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Global source locations of P-wave microseisms using Hi-net data from 2005 to 2011 (2017)
  • Author(s): 西田 究・高木 涼太
  • Organizer: 日本地球惑星科学連合2017年大会
• [Presentation] Global source location of P-wave microseisms using Hi-net data from 2005 to 2011 (2017)
  • Author(s): Kiwamu Nishida, Ryota Takagi
  • Organizer: IASPEI
  • Int'l Joint Research
• [Presentation] Hi‐net(2005‐2011)データを用いた脈動実体波成分の系統的な解析 (2016)
  • Author(s): 西田究, 高木涼太
  • Organizer: 日本地震学会秋季大会
  • Place of Presentation: 名古屋国際会議場(愛知県・名古屋市)
  • Year and Date: 2016-10-05
• [Presentation] 脈動実体波を用いた上部マントル不連続面変換波の検出 (2016)
  • Author(s): 西田究
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ(千葉県・千葉市)
  • Year and Date: 2016-05-22
• [Presentation] Body wave microseisms from a distant storm revealed by Hi-net data (2015)
  • Author(s): Kiwamu Nishida
  • Organizer: AGU fall meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2015-12-17
  • Int'l Joint Research
• [Presentation] Hi-net データを用いた脈動実体波成分の解析 (2015)
  • Author(s): 西田究
  • Organizer: 地震学会秋季大会
  • Place of Presentation: 神戸国際会議場・神戸市・兵庫県
  • Year and Date: 2015-10-27
• [Presentation] Hi-net データを用いた脈動実体波成分の解析 (2015)
  • Author(s): 西田究
  • Organizer: 地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ・千葉市・千葉県
  • Year and Date: 2015-05-26
• [Presentation] Lamb波と熱圏にトラップされた重力波のカップリング (2014)
  • Author(s): 西田究・小林直樹、深尾良夫
  • Organizer: 地球惑星連合大会
  • Place of Presentation: パシフィコ横浜(神奈川県横浜市)
  • Year and Date: 2014-04-28 – 2014-05-02
• [Remarks] 大西洋の爆弾低気圧によって励起された脈動実体波
  • URL: http://www.eri.u-tokyo.ac.jp/people/knishida/Research/Science2016/Science2016.html
• [Remarks]
  • URL: http://www.eri.u-tokyo.ac.jp/people/knishida/