Absolute Gravity Measurements in New Zealand for the techtonic studies in Southern Alphs and establishing absolute gravity net

• Project/Area Number: 15H05205
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 海外学術
• Research Field: Solid earth and planetary physics
• Research Institution: Kyoto University
• Principal Investigator: Fukuda Yoichi 京都大学, 理学研究科, 教授 (30133854)
• Project Period (FY): 2015-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥16,120,000 (Direct Cost: ¥12,400,000、Indirect Cost: ¥3,720,000); Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2017: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2016: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000); Fiscal Year 2015: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
• Keywords: 絶対重力測定 / 重力変化 / テクトニクス / ニュージーランド / 南アルプス / カイコウラ地震 / 測地 / 地殻変動 / ニュージランド

Outline of Final Research Achievements

To enhance and extend the absolute gravity network, we have newly conducted absolute gravity measurements in New Zealand. As a result, we supported the result obtained by Bilham et al. (2016) about the gravity change in the Southern Alps. On the other hand, we showed that the trend of gravity decreases after the 2011 Christchurch earthquake was probably as same as that of before the earthquake. Furthermore, we revealed the gravity changes caused by the 2016 Kaikoura earthquake and showed that the regional differences in the relationship between the gravity changes and the height changes possibly depended on the tectonic characteristics of the regions.

Academic Significance and Societal Importance of the Research Achievements

ニュージーランドでの絶対重力測定を実施することで，同国の重力に関連したさまざまな研究や社会的にも重要な度量衡・測量の基準となる絶対重力基準点網の強化に寄与した．さらに，南アルプスのテクトニクスに関連した重力変化や，クライストチャーチ地震やカイコウラ地震に伴う重力変化を検出することで，学術的に重要なその変動のメカニズムに関する知見を与えた．

Research Products

• [Int'l Joint Research] GNS Science/Land Information New Zealand(ニュージーランド)
• [Int'l Joint Research] Geoscience Australia/Curtin University(オーストラリア)
• [Int'l Joint Research] GNS Science/Land Infromation New Zealand/Auckland University of Technology(ニュージーランド)
• [Int'l Joint Research] Auckland University of Technology/Land Information New Zealand/GNS Science(New Zealand)
• [Journal Article] Evaluating temporal stability of the New Zealand quasigeoid following the 2016 Kaik?ura earthquake using satellite radar remote sensing (2019)
  • Author(s): McCubbine J C、Stagpoole V、Caratori T F、Featherstone W E、Garthwaite M C、Brown N J、Amos M J、Fukuda Y、Kazama T、Takiguchi H、Nishijima J
  • Journal Title: Geophysical Journal International Volume: 220 Issue: 3 Pages: 1917-1927
  • DOI: 10.1093/gji/ggz536
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] New Absolute Gravity Measurements in New Zealand (2017)
  • Author(s): Fukuda Yoichi、Takiguchi Hiroshi、Kazama Takahito、Nishijima Jun、Gulyaev Sergei、Natusch Tim、Amos Matt、Stagpoole Vaughan、Pearson Christopher
  • Journal Title: International Association of Geodesy Symposia Volume: 47 Pages: 1-7
  • DOI: 10.1007/1345_2017_18
  • ISBN: 9783319953175, 9783319953182
  • Peer Reviewed / Int'l Joint Research
• [Presentation] 2016年カイコウラ地震による重力変化 (2018)
  • Author(s): 福田 洋一、瀧口 博士、西島 潤、風間 卓仁、Stagpoole Vaughan、O'Brien Grant
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] 2016年カイコウラ地震による重力と高さ変化 (2018)
  • Author(s): 福田洋一，瀧口博士，西島潤，風間卓仁
  • Organizer: 日本測地学会第130回講演会
• [Presentation] Gravity changes due to the 2016 Kaikoura earthquake (2018)
  • Author(s): Yoichi Fukuda, Takahito Kazama, Hiroshi Takiguchi , Jun Nishijima, Vaughan Stagpoole, Grant O'Brien, Fabio Caratori Tontini
  • Organizer: International Symposium on Gravity, Geoid and Height Systems 2018 (GGHS 2018)
  • Int'l Joint Research
• [Presentation] Gravity changes due to the 2016 Kaikoura earthquake (2018)
  • Author(s): Yoichi Fukuda, Takahito Kazama, Hiroshi Takiguchi, Jun Nishijima, Vaughan Stagpoole, Grant O'Brien, Fabio Caratori Tontini
  • Organizer: GGHS2018
  • Int'l Joint Research
• [Presentation] 2016年カイコウラ地震による重力と高さ変化 (2018)
  • Author(s): 福田洋一、瀧口博士、西島潤、風間卓仁
  • Organizer: 日本測地学会第130回講演会
• [Presentation] Absolute gravity measurements in New Zealand (2nd report) (2017)
  • Author(s): 2.福田 洋一、瀧口 博士、西島 潤、風間 卓仁、Stagpoole Vaughan、Gulyaev Sergei、Natusch Tim、Amos Matt
  • Organizer: 日本地球惑星科学連合2017年大会
• [Presentation] Gravity Measurements At Absolute Gravity Points In New Zealand (2017)
  • Author(s): 3.Yoichi Fukuda, Hiroshi Takiguchi , Jun Nishijima, Takahito Kazama, Vaughan Stagpoole, Sergei Gulyaev, Tim Natusch, Matt Amos
  • Organizer: AOGS 14th Annual Meeting
  • Int'l Joint Research
• [Presentation] 2016年カイコウラ地震による重力変化 (2017)
  • Author(s): 福田 洋一，瀧口 博士，西島 潤，風間 卓仁，Vaughan Stagpoole，Matt Amos
  • Organizer: 日本測地学会第128回講演会
• [Presentation] ニュージーランドでの絶対重力測定 (2016)
  • Author(s): 福田 洋一、瀧口 博士、風間 卓仁、西島 潤、Gulyaev Sergei、Natusch Tim、Atmos Matt
  • Organizer: 地球惑星科学連合201６年大会
  • Place of Presentation: 千葉市，幕張メッセ国際会議場
• [Presentation] New absolute gravity measurements in New Zealand (2016)
  • Author(s): Yoichi Fukuda, Hiroshi Takiguchi , Takahito Kazama, Jun Nishijima, Sergei Gulyaev, Tim Natusch, Matt Amos, Vaughan Stagpoole, Christopher Pearson
  • Organizer: International Symposium on Gravity, Geoid and Height Systems 2016
  • Place of Presentation: Aristotle University, Thessaloniki, Greece
  • Int'l Joint Research
• [Remarks] AUT home to rare science equipment
  • URL: http://www.news.aut.ac.nz/news/homepage/homepage-main-news/aut-home-to-rare-science-equipment