• What's new:
  NECESSArrayチームの研究成果がNature Geoscienceに掲載されました． (2014/5/18)
  NECESSArray波形データの公開を以下のリンク先で開始しました。(2014/3/4)
  http://ohpdmc.eri.u-tokyo.ac.jp/
  Campaign Networks ->
  Land Seismograph Networks ->
  NECESSArray Data Acquisition
  

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Papers using NECESSArray data:
1. Iritani, R., N. Takeuchi and H. Kawakatsu (2014), Intricate heterogeneous structure of the top 300 km of the Earth's inner core inferred from global array data: I. Regional 1D attenuation and velocity profiles, Phys. Earth Planet. Int., 230, 15-27. online
2. Tao, K., F.-L. Niu, J. Ning, Y. J. Chen., S. P Grand, H. Kawakatsu, S. Tanaka, M. Obayashi, J. F Ni (2014), Crustal structure beneath NE China imaged by NECESSArray receiver function data, Earth Planet Science Lett., 398, 48-57. online
3. Tang, Y., M. Obayashi, F.-L. Niu, S. P Grand, Y. J. Chen., H. Kawakatsu, S. Tanaka, J. Ning, J. F Ni (2014), Changbaishan volcanism in northeast China linked to subduction-induced mantle upwelling, Nature Geoscience, 7, 470-475, doi:10.1038/ngeo2166. online
4. Iritani, R., N. Takeuchi and H. Kawakatsu (2014), Intricate heterogeneous structures of the top 300 km of the Earth’s inner core inferred from global array data: II. Frequency dependence of inner core attenuation and its implication, Earth Planet Science Lett, 405, 231-243
5. Takeuchi, N., H. Kawakatsu, S. Tanaka, M. Obayashi, Y. J. Chen., J. Ning, S. P Grand, F.-L. Niu, J. F Ni, *R. Iritani , **K. Idehara , **T. Tonegawa (2014), Upper Mantle Tomography in the Northwestern Pacific Region Using Triplicated P Waves, J. Geophys. Res., accepted.
6. Ranasinghe, N. R., A. C. Gallegos, A. R. Trujillo, A. R. Blanchette, E. A. Sandvol, J. Ni, T. M. Hearn, Y. Tang, S. P. Grand, F.-L. Niu, Y. J. Chen, J. Ning, H. Kawakatsu, S. Tanaka, M. Obayashi (2014), Lg Attenuation in Northeast China Using NECESSArray Data, Geophys. J. Int., accepted.
7. Liu, Z., F.-L. Niu, Y. J. Chen., S. P Grand, H. Kawakatsu, J. Ning, S. Tanaka, M. Obayashi, J. F Ni (2014), Receiver function images of the mantle transition zone beneath NE China: new constraints on intraplate volcanism, deep subduction and their potential link, Earth Planet Science Lett., submitted.
8. Tanaka, S., H. Kawakatsu, M. Obayashi, Y. J. Chen., J. Ning, S. P Grand, F.-L. Niu, J. F Ni (2014), Rapid lateral variation of P-wave velocity at the base of the mantle near the edge of the Large Low Velocity Province beneath the Western Pacific, Geophys. Jour. Inter., submitted.
9. Guo, Z., Y. J. Chen, J. Ning, X. Wang, Y. Feng, S. P. Grand, F. Niu, H. Kawakatsu, S. Tanaka, M. Obayashi, and J. Ni (2014), High resolution crustal structure beneath NE China from 3D joint inversion of ambient noise and receiver functions using NECESSArray data, Earth Planet Science Lett., submitted.
10. Isse et al., Surface wave analysis, in preparation.
11. Obayashi et al., P-wave tomography, in preparation.
12. Niu et al., S-wave splitting, in preparation.

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NECESSArray workshop 2012 @Beijing (2012/9/22-23)
NECESSArray workshop 2012 @Tokyo(2012/6/24-27)
科研成果報告書(2012/6/04)


１２０全点の撤収が完了しました！！(2011/8/20)
観測網撤収(2011/8/06-23)
観測点保守（田中，宮川）(2010/4/12-2010/5/18)
観測点保守（出原）(2009/10/28-2009/11/21)
観測点設置の旅 (2009/9/2-2009/9/29)


“フロンティア観測地球科学” ワークショップ（2010/03/23)



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Seleceted publications:
• Takeuchi, N. (2012), Detection of ridge-like structures in the Pacific Large Low-Shear-Velocity Province, Earth Planet. Sci. Lett., 319-320, 55-64.
• Kawakatsu, H., and S. Yoshioka (2011), Metastable olivine wedge and deep dry cold slab beneath SW Japan, Earth Planet. Sci. Lett., 303, 1-10.
• Idehara, K. (2011), Structural heterogeneity of an ultra-low-velocity zone beneath the Philippine Islands: Implications for core-mantle chemical interactions induced by massive partial melting at the bottom of the mantle Phys. Earth Planet. Int., 184, 80-90.
• Honda, S. (2011), Planform of small-scale convection under the island arc, Geochem. Geophys. Geosyst., 12, Q11005, doi:10.1029/2011GC003827.
• Iritani, R., N. Takeuchi and H. Kawakatsu (2010), Seismic attenuation structure of the top half of the inner core beneath the northeastern Pacific, Geophy. Res. Lett., 37, L19303, doi:10.1029/2010GL044053.
• Reynard, B., J. Nakajima, and H. Kawakatsu (2010), Earthquakes and plastic deformation of anhydrous slab mantle in double Wadati-Benioff zones, Geophy. Res. Lett., 37, L24309, doi:10.1029/2010GL045494.
• Tanaka, S. (2010), Constraints on the core-mantle boundary topography from P4KP-PcP differential travel times, J. Geophys. Res., B04310, doi10.1029/2009JB006563.
• Bai, L., H. Kawakatsu, and Y. Morita (2010), Two anisotropic layers in central orogenic belt of North China Craton Tectonophys., 494, 138-148.
• Takeuchi, N., and K. Obara (2010), Fine-scale topography of the D″ discontinuity and its correlation to volumetric velocity fluctuations Phys. Earth Planet. Int., 183, 126-135.
• Bina, C. R., and H. Kawakatsu (2010), Buoyancy, Bending, and Seismic Visibility in Deep Slab Stagnation, Phys. Earth Planet. Int., 183, 330-340, 2010.
• Obayashi M., J. Yoshimitsu, Y. Fukao (2009), Tearing of Stagnant Slab, Science, 324, 1173-1175.
• Shen, Xuzhang, Huilan Zhou, and Kawakatsu, H. (2008), Mapping the Upper Mantle Discontinuities beneath China with Teleseismic Receiver Functions, Earth Planets Space , 60, 713-719.
  
  
• 読売新聞（10月14日付 第2面）で NECESSArray計画が紹介されました (2007/10/14)
  

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• NECESSArrayとは？
  
  
• 四川地震の影響などもあり，予定が１年先送りされています．(2008/05)
  
  
• 観測準備
  
  
• What was new:
  観測点選びの旅 (2009/5/5-2009/5/30)
  南海道NECESSArray (2008/10-2009/03)
  
  中国大陸セミナー １年ぶりに再開します!
  第５回 ６月８日 ５：００　＠講義室 by 田中 聡（IFREE/JAMSTEC）、宮川幸治（ERI)
  「観測点選びの旅：二人あわせて"地球の中心往復”をして（仮題）」
  

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• Data:
  Reftek manuals: 130 01 Startup 2.9.1 (3MB), 130 PFC (3MB), Cables (2MB) 130 01 Startup (3MB),
  More Manuals

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• Funding:
  科学研究費・基盤研究（Ｓ）（Ｈ１９−２３）
  2007年度所長裁量経費（地震研究所）
  2006年度所長裁量経費（地震研究所）
  海半球観測研究センター・将来構想