Junichi Nakajima

Associate Professor

Research Center for Prediction of Earthquakes and Volcanic Eruptions,
Tohoku University, Sendai, JAPAN

e-mail: nakajima [at] aob.gp.tohoku.ac.jp

Japanese/English

Last updated: April 23, 2014.


Plate Data

Digital data for geometries of the Pacific and Philippine Sea plates around the Japanese Islands are available.

http://www.mri-jma.go.jp/Dep/sv/2ken/fhirose/index.e.html


Interests

Articles

Dissertations

CV (PDF)



Interests

Seismotectonics in subduction zones

I am working on seismic tomography and related works to understand what is going on in subductoin zones. Formerly, I have studied the mantle wedge structure in terms of seismic velocity, attenuation, and anisotropy, and revealed the existence of a mantle upwelling flow inclining sub-parallel to the down-dip direction of the downgoing plate. Recent my concern is geofluid distribution in the subducting oceanic lithosphere and its relation to seismicity. The work involves not only high-resolution seimsmic tomography but also the investigation of stress field in the slab. The results show that phase transformtion to eclogite in the oceanic crust is temperature-dependent reaction and the crust carries geofluids to depths beyond 150 km in some cases.


Articles with review

2014

 

86. A. Hasegawa, J. Nakajima, and D. Zhao
Deep seismic structure
In
Geology of Japan, in press.

85. J-I. Kimura, and J. Nakajima
Behavior of subducted water and its role in magma genesis in the NE Japan arc: A combined geophysical and geochemical approach
Geochim. Cosmochim. Acta, in press.

84. J-I. Kimura, J. Gill, T. Kunikiyo, I. Osaka, Y. Shimoshioiri, M. Kakasuke, S. Kakubuchi, T. Nagao, K. Furuyama, A. Kamei, H. Kawabata, J. Nakajima, P.E. van Keken, and R.J. Stern
Diverse magmatic effects of subducting a hot slab in SW Japan: results from forward modeling
Geochem. Geophys. Geosys., 15, 691-739, doi:10.1002/2013GC005132, 2014.
http://onlinelibrary.wiley.com/doi/10.1002/2013GC005132/abstract

83.   J. Nakajima
Seismic attenuation beneath Kanto, Japan: Evidence for high attenuation in the serpenitized subducting mantle
Earth, Planets and Space., 66, 12, doi:10.1186/1800-5981-66-12, 2014. (LINK)

2013

82. J. Nakajima, S. Hada, E. Hayami, N. Uchida, A. Hasegawa, S. Yoshioka, T. Matsuzawa, and N. Umino
Seismic attenuation beneath northeastern Japan: Constraints on mantle dynamics and arc magmatism
J. Geophys. Res, Solid Earth, 118, 5838-5855, doi:10.1002/20013JB010388.
http://onlinelibrary.wiley.com/doi/10.1002/2013JB010388/abstract

81. T. Yoshida, J. Kimura, R. Yamada, V. Acocella, H. Sato, D. Zhao, J. Nakajima, A. Hasegawa, T. Okada, S. Honda, M. Ishikawa, O. Prima, T. Kudo, B. Shibazaki, A. Tanaka, and T. Imaizumi
Evolution of the Late Cenozoic Magmatism and the Crust-Mantle structure in the NE Japan Arc,
In: Gomez-Tuena A., Straub S.M., Zellmer G.F. (eds) Orogenic andesites and crustal growth. Geological Society, London, Special Publications, in press.

80. S. Yoshioka, Y. Suminokura, T. Matsumoto, and J. Nakajima
Two-dimensional thermal modeling of subduction of the Philippine Sea plate beneath southwest Japan
Tectonophysics, 608, 1094-1108, 2013.
http://www.sciencedirect.com/science/article/pii/S0040195113004162

79. A. Hasegawa, J. Nakajima, N. Uchida, and N. Umino
Subduction of two oceanic plates and unique seismic activity beneath the Tokyto metropolitan area (in Japanese with English abstract)
J. Geography, 122, 398-417, 2013.

78. J. Nakajima, K. Yoshida, and A. Hasegawa
An intraslab seismic sequence activated by the Tohoku-oki earthquake: Evidence for fluid-related embrittlement
J. Geophys. Res., 118, 3492-3505, doi:10.1002/jgrb.50246, 2013.

http://onlinelibrary.wiley.com/doi/10.1002/jgrb.50246/abstract

77. K. Umeda, T. Kusano, A. Ninomiya, K. Asamori, and J. Nakajima
Spatial variations in 3He/4He ratios along a high strain rate zone, central Japan
J. Asian. Earth Sci., 73, 95-102, 2013.

http://www.sciencedirect.com/science/article/pii/S1367912013002265

76. T. Shiina, J. Nakajima, and T. Matsuzawa
Seismic evidence for high pore pressure in the oceanic crust: Implications for fluid-
Spatial variations in 3He/4He ratios along a high strain rate zone, central Japarelated embrittlement
Geophys. Res. Lett., 
40, 2006-2010, doi:10.1002/grl.50468, 2013.
http://onlinelibrary.wiley.com/doi/10.1002/grl.50468/abstract

75. G.A. Abers, J. Nakajima, P.E. van Keken, S. Kita, and B.R. Hacker
Thermal-petrological controls on the location of earthquakes within subducting plates
Earth Planet Sci. Lett., 369-370, 178-187, 2013.

http://www.sciencedirect.com/science/article/pii/S0012821X1300143X

74. J. Nakajima, N. Uchida, T. Shiina, A. Hasegawa, B.R. Hacker, and S.H. Kirby
Intermediate-depth earthquakes facilitated by eclogitization-related stresses
Geology, 41, 659-662, 2013. (PDF)

73. A. Hasegawa, J. Nakajima, T. Yanada, N. Uchida, T. Okada, D. Zhao, T. Matsuzawa, and N. Umino
Copmplex slab structure and arc magmatism beneath the Japaneses Islands
J. Asian Earh Sci., 78, 277-290, 2013.
http://www.sciencedirect.com/science/article/pii/S1367912012005883

2012

72. T. Hayashida, F. Tajima, J. Nakajima, and J. Mori
3D Seismic Wave Speed Model in Southwestern Japan from Combined Use of Waveform Modeling and Travel-Time Tomography
J. Geophys. Res., 117, B11305, doi:/10.1029/2012JB009345, 2012.
http://www.agu.org/pubs/crossref/2012/2012JB009345.shtml

71. P.E. van Keken, S. Kita, and J. Nakajima
Thermal structure and intermediate-depth seismicity in the Tohoku-Hokkaido subduction zones
Solid Earth, 3, 355-364, 2012.

70. S. Kita, A. Hasegawa, J. Nakajima, T. Okada, T. Matsuzawa, and K. Katsumata
High-resolution seismic velocity structure beneath the Hokkaido corner, northern Japan: Arc-arc collision and origins of the 1970 M 6.7 Hidaka and 1982 M 7.1 Uraka-wa-oki earthquakes,
J. Geophys. Res., 117, B12301, doi:10.1029/2012JB009356, 2012.
http://www.agu.org/pubs/crossref/2012/2012JB009356.shtml

69. Y. Ohta, D. Inazu, M. Ohzono, Y. Ito, M. Mishina, T. Iinuma, J. Nakajima, Y. Osada, K. Suzuki, H. Fujimoto,  K. Tachibana, T. Demachi, and S. Miura
Geodetic constrains on afterslip characteristics following the March 9, 2011, Sanriku-oki earthquake, Japan
Geophys. Res. Lett., 39, L16304, doi:10.1029/2012GL052430, 2012.
http://www.agu.org/pubs/crossref/2012/2012GL052430.shtml

68. A. Hasegawa, J. Nakajima, N. Uchida, T. Yanada, T. Okada, D. Zhao, T. Matsuzawa, and N. Umino
Mechanism generating earthquakes in subduction zones: Vital role of geofluids in earthquake generation (in Japanese with English abstract),
J. Geography, 121, 128-160, 2012.

67. Y. Ito, K. .Shiomi, J. Nakajima, and R. Hino
Autocorrelation analysis of ambientg noise in northeastern Japan subduction zone
Tectonophysics, 572-573, 38-46, 2012.
http://www.sciencedirect.com/science/article/pii/S0040195111003969

66. A. Omuralieva, A. Hasegawa, T. Matsuzawa, J. Nakajima, T. Okada
Lateral variation of the cutoff depth of shallow earthquakes beneath the Japan Islands anbd its implications for seismogenesis
Tectonophysics, 518-521, 93-105, 2012. 

2011

65. J. Nakajima, A. Hasegawa, and F. Hirose
Stress regime in the Philippine Sea slab beneath Kanto, Japan
Geophys. Res. Lett., 38, L16318, doi:10.1029/2011GL048754, 2011.
http://www.agu.org/pubs/crossref/2011/2011GL048754.shtml

64. J. Nakajima, A. Hasegawa, and S. Kita
Seismic evidence for reactivation of a buried hydrated fault in the Pacific slab by the 2011 M9.0 Tohoku earthquake
Geophys. Res. Lett., 38, L00G06, doi:10.1029/2011GL048432, 2011.
http://www.agu.org/pubs/crossref/2011/2011GL048432.shtml

63. T. Okada, K. Yoshida, S. Ueki, J. Nakajima, N. Uchida, T. Matsuzawa, N. Umino, A. Hasegawa, and Group for the aftershock observations of the 2011 off the Pacific Coast of Tohoku Earthquake
Shallow inland earthquakes in NE Japan possibly triggered by the 2011 off the Pacific coast of Tohoku Earthquake
Earth Planets and Space, 63, 755-759, 2011.
62. A. Kato et al.
Anomalous depth dependency of the stress field in the 2007 Noto Hanto, Japan, earthquake: Potential involvement of a deep fluid reservoir
Geophys. Res. Lett.38, L06306, doi:10.1029/2010GL046413, 2011.

2010

61. B. Reynard, J. Nakajima, and H. Kawakatsu,
Earthquakes and plastic deformation of anhydrous slab mantle in double Wadati-Benioff zones
Geophys. Res. Lett., 37, L24309, doi:10.1029/2010GL045494, 2010.

60. S. Kita, T. Okada, A. Hasegawa, J. Nakajima, and T. Matsuzawa
Existence of interplane earthquakes and neutral stress boundary between the upper and lower planes of the double seismic zone beneath Tohoku and Hokkaido, northeastern Japan,
Tectonophysics, 496, 68-82, 2010.

59. J. Nakajima, A Kato, T. Iwasaki, S. Ohmi, T. Okada, T. Takeda, and The Japanese University Group of the Joint Seismic Observations at NKTZ,
Deep crustal structure around the Atotsugawa fault system, central Japan: A weak zone below the seismogenic zone and its role in earthquake generation,
Earth Planets and Space, 62, 555-566, 2010.

58. I. Katayama, K. Hirauchi, and J. Nakajima
Valiability of subduction processes beneath Japan (in Japanese with English abstract)
J. Geography, 119, 205-223, 2010.

57. A. Hasegawa, J. Nakajima, N. Uchida, F. Hirose, S. Kita, and T. Matsuzawa
Slab structure beneath the Japanese Islands and earthquake generation (in Japanese with English abstract)
J. Geography, 119, 190-204, 2010.

56. N. Uchida, T. Matsuzawa, J. Nakajima, and A. Hasegawa
Subduction of a wedge-shaped Philippine Sea plate beneath Kanto, central Japan, estimated from converted waves and small repeating earthquakes
J. Geophys. Res., 115, B07309, doi:10.1029/2009JB006962, 2010.

55. S. Kita, T. Okada, A. Hasegawa, J. Nakajima, and T. Matsuzawa
Anomalous deepening of a seismic belt in the upper-plane of the double seismic zone in the Pacific slab beneath the Hokkaido corner: Possible evidence for thermal shielding caused by subducted forearc crust materials
Earth Planet. Sci. Lett.,  290, 415-426, 2010.

54. J. Nakajima, and A. Hasegawa
Cause of M~7 earthquakes beneath the Tokyo metropolitan area, Japan: Possible evidence for a vertical tear at the easternmost portion of the Philippine Sea slab
J. Geophys. Res., 115, B04301, doi:10.1029/2009JB006863, 2010.

2009

53. Y. Tamura, J. Nakajima, S. Kodaira, and A. Hasegawa,
Tectonic setting of volcanic centers in subduction zones: 3D structure of mantle wedge and arc crust,
In Volcanic and Tectonic Hazard Assessment for Nuclear Facilities, edited by Conner, C., Chapman, N.A, Conner, L.., 177-194 pp, Cambridge University Press, 2009.

52. K. Umeda, A. Ninomiya, K. Shimada, and J. Nakajima,
Helium isotope variations along the Niigata-Kobe Tectonic Zone, central Japan
In The Lithosphere; Geochemistry, Geology and Geophysics, edited by ANderson, J.E., and Coates, R.W., 141-170 pp., Nova Science Publisher Inc., 2009.

51. J. Nakjima, F. Hirose, and A. Hasegawa,
Seismotectonics beneath the Tokyo metropolitan area, Japan: Effect of slab-slab contact and overlap on seismicity
J. Geophys. Res., 114, B08309, doi:10.1029/2008JB00610, 2009.
http://www.agu.org/pubs/crossref/2009/2008JB006101.shtml

50. N. Uchida, J. Nakajima, A. Hasegawa, and T. Matsuzawa
Evidence for abrupt change in coupling across a border between two overlying plates in the NE Japan subduction zone
Earth Planet. Sci. Lett., 283, 111-121, 2009.
http://dx.doi.org/doi:10.1016/j.epsl.2009.04.003

49. S. Yamamoto, J. Nakjima, A. Hasegawa, and S. Maruyama
Izu-Bonin arc subduction under the Honshu island, Japan: Evidence from geological and seismological aspect
Gondwana Research, 16, 572-580, 2009.
http://dx.doi.org/doi:10.1016/j.gr.2009.05.014

48. A. Hasegawa, J. Nakajima, N. Uchida,T. Okada, D. Zhao, T. Matsuzawa, and N. Umino
Plate subduction, and generation of earthquakes and magmas in Japan as inferred from seismic observations: An overview
Gondwana Research, 16, 370-400, 2009.
http://dx.doi.org/doi:10.1016/j.gr.2009.03.007

47. J. Nakajima, Y. Tsuji, A. Hasegawa, S. Kita, T. Okada, and T. Matsuzawa
Tomographic imaging of hydrated crust and mantle in the subducting Pacific slab beneath Hokkaido, Japan: Evidence for dehydration embrittlement as a cause of intraslab earthquakes
Gondwana Research, 16, 470-481, 2009.
http://dx.doi.org/doi:10.1016/j.gr.2008.12.010

46. J. Nakajima, Y. Tsuji, and Akira Hasegawa,
Seismic evidence for thermally-controlled dehydration in subducting oceanic crust
Geophys. Res. Lett., 36, L03303, doi:10.1029/2008GL036865, 2009.
http://www.agu.org/pubs/crossref/2009/2008GL036865.shtml

45. J. Nakajima, and A. Hasegawa,
Tomographic evidence of slab subduction and arc magmatism in the Japan subduction zone (in Japanese with English abstract)
Zisin (a special issue), 61, S177-S186, 2009.

44. A. Omuralieva, J. Nakajima, and A. Hasegawa
Three-dimensional seismic velocity structure of the crust beneath the central Tien Shan, Kyrgyzstan: Implications for large- and small-scale mountain building
Tectonophysics, 465, 30-44, 2009.
http://dx.doi.org/10.1016/j.tecto.2008.10.010

43. Y. Sano, A. Kameda, N. Takahata, J. Yamamoto, and J. Nakajima
Tracing extinct spreading center in SW Japan by helium-3 emanation
Chemical Geology, 266, 50-56, 2009.
http://dx.doi.org/doi:10.1016/j.chemgeo.2008.10.020

2008

42. Nishimoto, S., M. Ishikawa1, M. Arima1, T. Yoshida and J. Nakajima
Simultaneous high P-T measurements of ultrasonic compressional and shear wave velocities in Ichino-megata mafic xenoliths: Their bearings on seismic velocity perturbations in lower crust of Northeast Japan arc
J. Geophys. Res., 113, B12212, doi:10.1029/2008JB005587.
http://www.agu.org/pubs/crossref/2008/2008JB005587.shtml

41. F. Hirose, J. Nakajima, and A. Hasegawa
Three-dimensional seismic velocity structure and configuration of the Philippine Sea slab in southwestern Japan estimated by double-difference tomography
J. Geophys. Res., 113, B09315, doi:10.1029/2007JB005274, 2008.
http://www.agu.org/pubs/crossref/2008/2007JB005274.shtml

40. Y. Tsuji, J. Nakajima, and A. Hasegawa
Tomographic evidence for hydrated oceanic crust of the Pacific slab beneath northeastern Japan: Implications for water transportation in subduction zones
Geophys. Res. Lett., 35, L14308, doi:10.1029/2008GL034461, 2008.PDF
http://www.agu.org/pubs/crossref/2008/2008GL034461.shtml 

39. S. Yoshioka, M. Toda, and J. Nakajima
Regionality of deep low-frequency earthquakes associated with subduction of the Philippine Sea plate along the Nankai Trough, southwest Japan
Earth Planet. Sci. Lett., 272, 189-198, 2008.
http://dx.doi.org/10.1016/j.epsl.2008.04.039

38. J. Nakajima, and A. Hasegawa
Existence of low-velocity zones under the source areas of the 2004 Chuetsu and 2007 Chuetsu-oki earthquakes inferred from travel-time tomography
Earth Planets and Space, 60, 1127-1130, 2008.@

37. J. Nakajima, and A. Hasegawa
Seismological imaging of the mantle wedge structure beneath the northeastern Japan arc and its intepretation (in Japanese with English abstract)
J. Geography, 117, 76-92, 2008

36. A. Hasegawa, J. Nakajima, S. Kita, Y. Tsuji, K. Nii, T. Okada, T. Matsuzawa, and D. Zhao
Transportation of H2O in the NE Japan subduction zone as inferred from seismic observations - Supply of H2O from the slab to the arc crust (in Japanese with English abstract)
J. Geography, 117, 59-75, 2008.

35. Y. Sano, and J. Nakajima
Geographical distribution of 3He/4He ratios and seismic tomography in Japan
Geochem. J., 42, 51-60, 2008.

34. F. Hirose, J. Nakajima, and A. Hasegawa
Three-dimensional velocity structure and configuration of the Philippine Sea slab beneath Kanto district, central Japan, estimated by double-difference tomography (in Japanese with English abstract)
J. Seismol. Soc. Japan, 60, 123-138, 2008.

33. J. Nakajima, H. Iwamori, and A. Hasegawa
Reply to the comment on "Tomographic evidence for the mantle upwelling beneath southwestern Japan and its implications for arc magmatism" by H. Mashima
Earth Planet. Sci. Lett. 265, 322-323, 2008.

2007

32. Xia, S., D. Zhao, X. Qiu, J. Nakajima, T. Matsuzawa, A. Hasegawa
Mapping the crustal structure under active volcanoes in central Tohoku, Japan using P and PmP data
Geophys. Res. Lett., 34, L10309, doi:10.1029/2007GL030026, 2007.

31. A. Hasegawa, J. Nakajima, S. Kita, T. Okada, T. Matsuzawa, and S. Kirby
Anomalous deeping of a belt of intraslab earthquakes in the Pacific slab crust under Kanto, central Japan: Possible anomalous thermal shielding, dehydration reactions, and seismicity cuased by shallower cold slab material
Geophys. Res. Lett., 34, L09305, doi:10.1029/2007GL029616, 2007.

30. J. Nakajima, and A. Hasegawa
Subduction of the Philippine Sea slab beneath southwestern Japan: Slab geometry and its relationship to arc magmatism
J. Geophys. Res., 112, B08306, doi:10.1029/2006JB004770, 2007. (PDF)
http://www.agu.org/pubs/crossref/2007/2006JB004770.shtml

29. F. Hirose, J. Nakajima, and A. Hasegawa
Three-dimensional velocity structure in southwestern Japan and configuration of the Philippine Sea slab estimated by double-difference tomography (in Japanese with English abstract)
J. Seismol. Soc. Japan, 60, 1-20, 2007.

28. J. Nakajima, and A. Hasegawa,
Deep crustal structure along the Niigata-Kobe Tectonic Zone, Japan: its origin and segmentation
Earth Planets and Space, 59, e5-e8, 2007 (PDF)

27. J. Nakajima, and A. Hasegawa
Tomographic evidence for the mantle upwelling beneath southwestern Japan and its implications for arc magmatism
Earth Planet. Sci. Lett., 254, 90-105, 2007.(PDF)

26. N. Umino, T. Kono, T. Okada, J. Nakajima, T. Matsuzawa, N. Uchida, A. Hasegawa, Y. Tamura, and G. Aoki
Relocation of the M~7 Miyagi-oki Earthquakes in the 1930s: Seismi c Slips of Asperities that Were Re-ruptured during the 1978 M7.4 Miyagi-oki Earthquake ? (in Japanese with English abstract)
J. Seismol. Soc. Japan, 59, 325-337, 2007

2006

25. N. Umino, T. Kono, T. Okada, J. Nakajima, T. Matsuzawa, N. Uchida, A. Hasegawa, Y. Tamura, and G. Aoki
Revisiting the three M7 Miyagi-oki earthquakes in the 1930s : Possible seismogenic slip@on asperities that were re-ruptured during the 1978 M7.4 Miyagi-oki earthquake
Earth Plantes and Space, 58, 1587-1592, 2006.

24. S. Kita, T. Okada, J. Nakajima, T. Matsuzawa, and A. Hasegawa
Existence of a seismic belt in the upper plane of the double seismic zone extending in the along-arc direction at depths of 70-100 km beneath NE Japan
Geophys. Res. Lett., 33, L24310, doi:10.1029/2006GL028239, 2006.

23. J. Nakajima, and A. Hasegawa
Anomalous low-velocity zone and linear alignment of seismicity along it in the subducted Pacific slab beneath Kanto, Japan: Reactivation of subducted fracture zone?
Geophys. Res. Lett., 33, L16309, doi:10.1029/2006GL026773, 2006 (PDF)
http://dx.doi.org/10.1029/2006GL026773

22. J. Nakajima, A. Hasegawa, S. Horiuchi, K. Yoshimoto, T. Yoshida, and N. Umino
Crustal heterogeneity around the Nagamachi-Rifu fault, northeastern Japan, as inferred from travel-time tomography
Earth Planets and Space, 58, 843-853, 2006. (PDF)
http://www.terrapub.co.jp/journals/EPS/abstract/5807/58070843.html

21. J. Nakajima, J. Shimizu, S. Hori, and A. Hasegawa
Shear-wave splitting beneath the southwestern Kurile arc and northeastern Japan arc: A new insight into mantle return flow
Geophys. Res. Lett., 33, L05305, doi:10.1029/2005GL025023, 2006. (PDF)
http://dx.doi.org/10.1029/2005GL025053

2005

20. T. Okada, N. Umino, T. Matsuzawa, J. Nakajima, N. Uchida, T. Nakayama, S. Hirahara, T. Sato, S. Hori, T. Kono, Y., T. Yaginuma, A. Hasegawa,Y. Asano, H. Zhang, C. Thurber
Imaging the fault planes of the 2004 Mid Niigata prefecture (Niigata-Chuetsu) earthquake sequence by applying double-difference tomography to dense temporary observation network data (in Japanese with English abstract)
J. Seismol. Soc. Japan
. 58, 283-295, 2005.

19.J. Shimizu, J. Nakajima, A. Hasegawa, and K. Obara
Shwar-wave polarization anisotropy and upwelling flow in the mantle wedge beneath Hokkaido and Tohoku, Japan (in Japanese with English abstract)
J. Seismol. Soc. Japan. 58, 153-164, 2005.

18. S. Baris, J. Nakajima, A. Hasegawa, Y. Honkura, A. , and S. Balamir Ucer
Three-dimensional structure of Vp, Vs and Vp/Vs in the upper crust of the Marmara region, NW Turkey
Earth Planets and Space, 57, 1019-1038, 2005.
http://www.terrapub.co.jp/journals/EPS/abstract/5711/57111019.html

17. A. Hasegawa, J. Nakajima, N. Umino, and S. Miura
Deep structure of the northeastern Japan arc and its implications for crustal deformation and shallow seismic activity
Tectonophysics, 403, 59-75, 2005
http://dx.doi.org/10.1016/j.tecto.2005.03.018

16. T. Okada, N. Umino, T. Matsuzawa, J. Nakajima, N. Uchida, T. Nakayama, S. Hirahara, T. Sato, S. Hori, T. Kono, Y. Yabe, K. Ariyoshi, S. Gamage, J. Shimizu, J. Suganomata, S. Kita, S. Yui, M. Arao, S. Hondo, T. Mizukami, H. Tsushima, T. Yaginuma, A. Hasegawa,
Aftershock distribution and 3D seismic velocity structure in and around the focal area of the 2004 mid Niigata prefecture earthquake obtained by applying double-difference tomography to dense temporary seismic network
Earth, Planets and Space, 57, 435-440, 2005.
http://www.terrapub.co.jp/journals/EPS/abstract/5705/57050435.htm

15. J. Nakajima, Y. Takei, A. Hasegawa,
Quantitative analysis of the inclined low-velocity zone in the mantle wedge of northeastern Japan: A systematic change of melt-filled pore shapes with depth and its implications for melt migration
Earth Planet. Sci. Lett., 234, 59-70, 2005. (PDF)
http://dx.doi.org/10.1016/j.epsl.2005.02.033

2004

14. J. Nakajima, and A. Hasegawa
Shear-wave polarization anisotropy and subduction-induced flow in the mantle wedge of northeastern Japan
Earth Planet. Sci. Lett., 225, 365-377, 2004 (PDF)
http://dx.doi.org/10.1016/j.epsl.2004.06.011

13. Y. Asano, K. Obara, J. Nakajima, and A. Hasegawa
Inhomogeneous crustal structure beneath northern Miyagi prefecture, northeastern Japan, imaged by coda envelope inversion: Implication for fluid@distribution
Geophys. Res. Lett., 31, L24615, doi:10.1029/2004GL021261, 2004.
http://dx.doi.org/10.1029/2004GL021261

12. A. Hasegawa, and J. Nakajima
Geophysical constraints on slab subduction and arc magmatism
inThe State of the Planet: Frontiers and Challenges in Geophysics, AGU Geophysical Monograph, 81-94, AGU, Washington DC..

11. A. Hasegawa, J. Nakajima, N. Umino, S. Miura, and Y. Suwa
Crustal deformation and shallow seismic activity beneath the northeastern Japan (in Japanese)
J. Seismol. Soc. Japan. 56, 413-424, 2004.

10. N. Umino, T. Okada, J. Nakajima, S. Hori, T. Kono, T. Nakayama, N. Uchida, J. Shimizu, J. SUganomata, G. Shantha, K. Nida, Y. Yabe, K. Sakoda, N. Sato, MM. Ito, A. Hasegawa, Y. Asano, A. Hasemi, T. Demachi, Y. Yajima
Hypocenter and focal mechanism distributions of aftershocks of July 26, 2003, M6.4 Northern Miyagi earthquake revealed by temporary observations
J. Seismol. Soc. Jpn, 56, 425-434, 2004.

2003

9. J. Nakajima, and A. Hasegawa
Estimation of thermal structure in the mantle wedge of northeastern Japan from seismic attenuation data
Geophys. Res. Lett
., 30, 10.1029/2003GL017185, 2003. (PDF)
http://dx.doi.org/10.1029/2003GL017185

8. J. Nakajima and A. Hasegawa
Tomographic imaging of seismic velocity structure in and around the Onikobe volcanic area, northeastern Japan: Implications for fluid distribution
J. Vol. Geotherm. Res., 127, 1-18, 2003. (PDF)
http://dx.doi.org/10.1016/S0377-0273(03)00155-0

7. N. Umimo, T. Okada, J. Nakajima, S. Hori, T. Kono, T. Nakayama, N. Uchida, J. Shimizu, J. Suganomata, S.S.S Gamage, A. Hasegawa, Y. Asano
Hypocenter and focal mechanism distributions of aftershocks of July 26 2003 M6.4 northern Miyagi, NE Japan, earthquake revealed by temporary seismic observation
Earth Planets Space, 55, 719-730, 2003.
http://www.terrapub.co.jp/journals/EPS/abstract/5512/55120719.html

2002

6. J. Nakajima, T. Matsuzawa and A. Hasegawa
Moho depth variation in the central part of northeastern Japan estimated form reflected and converted waves
Phys. Earth Planet Inter., 130, 31-47, 2002. (PDF)
http://dx.doi.org/10.1016/S0031-9201(01)00307-7

5. F. Hirose, A. Nakamura, J. Nakajima and A. Hasegawa
Along-arc variation of magma source in the subduction slab beneath NE Japan arc: Estimation from b-value and S-wave velocity distributions (in Japanese with English abstract)
Bull. Volcanol. Soc. Japan, 47, 475-480, 2002.

2001

4. J. Nakajima, T. Matsuzawa, A. Hasegawa and D. Zhao
Seismic velocity structure and Vp/Vs structure beneath the northeastern Japan arc as inferred from seismic traveltime tomography (in Japanese with English abstract)
Bull. Earthq. Res. Inst. Univ. Tokyo, 76, 13-21, 2001.

3. J. Nakajima, T. Matsuzawa, A. Hasegawa and D. Zhao
Three-dimensional structure of Vp, Vs, and Vp/Vs beneath northeastern Japan: Implications for arc magmatism and fluids
J. Geophys. Res., 106, 21843-21857, 2001. (PDF)
http://dx.doi.org/10.1029/2000JB00008

2. J. Nakajima, T. Matsuzawa, A. Hasegawa and D. Zhao
Seismic imaging of arc magma and fluids under the central part of northeastern Japan
Tectonophysics
, 341, 1-17, 2001. (PDF)
http://dx.doi.org/10.1016/S0040-1951(01)00181-0

1. M. Wyss, A. Hasegawa and J. Nakajima
Source and path of magma for volcanoes in the subduction zone of northeastern Japan
Geophys. Res. Lett., 28, 1819-1822, 2001.
http://dx.doi.org/10.1029/2000GL012558


Dissertations

Doctoral Dissertation

J. Nakajima
Temperature and fluid distributions in the northeastern Japan arc inferred ffrom seismic velocity and anisotropy structures (in Japanese)
Doctoral dissertation, 146 pp., Tohoku University, Sendai, Japan, 2003.

Master thesis

J. Nakajima
Three-dimensional seismic velocity structure beneath the northeastern Japan arc (in Japanese)
Master thesis, 120 pp., Tohoku University, Sendai, Japan, 2000.


Profile

Education

1994-1998: B.S., Geophysics (Faculty of Science, Tohoku University)
1998-2000: Sc. M, Geophysics (Graduate School of Science, Tohoku University)
2000-2003: Ph. D., Geophysics (Gradualte School of Science, Tohoku University)

Job History

April 2003-July 2003: JSPS Research Fellow
August 2003 - September 2009: Associate Professor
October 2009 - present: Associate Professor

Field

Seismology