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Volume 54 Supplement 5

Special Issue: Electromagnetic Induction in the Earth

Conductivity distribution and seismicity in the northeastern Japan Arc


Wideband magnetotelluric (MT) observation data were obtained from 91 sites along six transects in the central part of the Japan Arc. Here, a quasi-3D georesistivity distribution, in addition to other geophysical and geological parameters, is used to better understand seismicity in the region. We found that high seismicity in the Central Mountain Range is due to relatively poor fluid saturation caused by volcanism. The high conductive fracture zone in the west of the Central Basin without big earthquakes is characterized by a low Poisson ratio. It is suggested that strains cannot be accumulated in those regions. The Miyagi-ken-hokubu region with a frequent occurrence of large earthquakes, is conductive—high Poisson ratio—high Vp suggesting that the zone is relatively fluid-rich and brittle.


  • Active Fault Research Group, Active Faults in Japan, 437 pp., University of Tokyo Press, Tokyo, 1991.

    Google Scholar 

  • Aprea, C., M. Unsworth, and J. Booker, Resistivity structure of the Olympic Mountains and Puget Lowlands, Geophys. Res. Lett., 25, 109–112, 1998.

    Article  Google Scholar 

  • Chen, L., J. R. Booker, A. G. Jones, N. Wu, M. J. Unsworth, W. Wei, and H. Tan, Electrically conductive crust in Southern Tibet from INDEPTH magnetotelluric surveying, Science, 274, 1694–1696, 1996.

    Article  Google Scholar 

  • Fujinawa, Y., N. Kawakami, T. H. Asch, M. Uyeshima, and Y. Honkura, Studies of the Georesistivity structure in the central part of the northeastern Japan Arc, J. Geomag. Geoelectr., 49, 1601–1617, 1997.

    Article  Google Scholar 

  • Fujinawa, Y., N. Kawakami, J. Inoue, T. H. Asch, S. Takasugi, and Y. Honkura, 2-D georesistivity structure in the central part of the northeastern Japan arc, Earth Planets Space, 51, 1035–1046, 1999.

    Article  Google Scholar 

  • Gamble, T. D., W. M. Goubau, and J. Clarke, Magnetotellurics with a remote reference, Geophysics, 44, 53–68, 1979.

    Article  Google Scholar 

  • Geological Survey of Japan, Geological Map of Japan 1:1,000,000, Geological Survey of Japan, 1995.

  • Groom, R. W. and R. C. Bailey, Decomposition of magnetotelluric impedance tensors in the presence of local three-dimensional galvanic distortions, J. Geophys. Res., 94, 1913–1925, 1989.

    Article  Google Scholar 

  • Hasegawa, A., D. Zhao, S. Hori, A. Yamamoto, and S. Horiuchi, Deep structure of the northeastern Japan arc and its relationship to seismic and volcanic activity, Nature, 352, 682–689, 1991.

    Article  Google Scholar 

  • Honkura, Y., Electrical conductivity structure in the upper mantle and its implications for the origin of magma, Kazan, 2(33), 203–212, 1988.

    Google Scholar 

  • Horiuchi, S., H. Ishii, and A. Takagi, Two-dimensional depth structure of the crust beneath the Tohoku District, the northeastern Japan arc, I, Method and Conrad discontinuity, J. Phys. Earth, 30, 47–69, 1982.

    Article  Google Scholar 

  • Jones, A. G., Electrical conductivity of the continental lower crust, in Continental Lower Crust, edited by D. M. Fountain, R. J. Arculus, and R. W. Kay, Elsevier, New York, 1992.

    Google Scholar 

  • Kawakami, N., Y. Fujinawa, T. H. Asch, and S. Takasugi, Local three dimensional galvanic distortions in the central part of northeastern Japan, J. Geomag. Geoelectr., 49, 1387–1400, 1997.

    Article  Google Scholar 

  • Lee, K. H., K. Yamane, and S. Takasugi, A new 2-D inversion scheme for magnetotelluric data using a modified RRI method, Proceedings of the World Geothermal Congress 2, pp. 915–920, 1995.

  • Nabetani, S. and M. Fukuta, Conductivity structure of crust and mantle in the Northeastern Japan prospected by MT and GEMIT method, 10. Backbone Mountainland, Aomori, Sci. Rep. Hirosaki Univ., 42, 53–60, 1995.

    Google Scholar 

  • Nabetani, S., K. Maekawa, and K. Uchida, Conductivity structure of crust and mantle in the Northeastern Japan prospected by MT and GEMIT method, 1. East to west section along 40°40′N traverse, Sci. Rep. Hirosaki Univ., 39, 37–46, 1992.

    Google Scholar 

  • Ogawa, Y., Deep crustal resistivity structure revealed by sideband magnetotellurics-Tohoku and Hokkaido region, University of Tokyo, 1992.

    Google Scholar 

  • Sato, H., I. S. Sacks, and T. Murase, The use of laboratory velocity data for estimating temperature and partial melt fraction in the low velocity zone: comparison with heat flow and electrical conductivity studies, J. Geophys. Res., 94, 5689–5704, 1989.

    Article  Google Scholar 

  • Schultz, A. P. and R. S. Crosson, Seismic velocity structure across the Central Washington Cascade Range from refraction interpretation with earthquakes sources, J. Geophys. Res., 101, 27899–27915, 1996.

    Article  Google Scholar 

  • Simpson, F., Stress and seismicity in the lower-continental crust: a challenge to simple ductility and implication for electrical conductivity mechanisms, The 14th Workshop on Electromagnetic Induction in the Earth, pp. 215–228, 1998.

  • Smith, J. T. and J. R. Booker, Rapid inversion of two and three dimensional magnetotelluric data, J. Geophys. Res., 96, 3905–3922, 1991.

    Article  Google Scholar 

  • Umino, N. and A. Hasegawa, Inhomogeneous structure of the crust and its relationship to earthquake ocurrence, in Seismotectonics in Convergent Plate Boundary, pp. 225–235, 2002.

  • Utada, H., A direct inversion method for two-dimensional modeling in the geomagnetic induction problem, Doctoral thesis, University of Tokyo, 1987.

    Google Scholar 

  • Wu, H. and J. M. Lees, Three-dimensional P and S wave velocity structures of the Coso Geothermal Area, California, from microseismic travel time data, J. Geophys. Res., 104, 13217–13233, 1999.

    Article  Google Scholar 

  • Yamane, K., S. Takasugi, and K. H. Lee, A new magnetotelluric inversion scheme using generalized RRI method and case studies, Geophysics, 35, 209–213, 1996.

    Google Scholar 

  • Yokokura, T., T. Miyazaki, N. Kano, and K. Yamaguchi, Lower crustal and sub-crustal reflectors beneath the southern Kit akami area, Abst. 1998 Japan Earth and Planetary Science Joint Meeting, pp. 363, 1998.

  • Zhao, D. and H. Negishi, The 1995 Kobe earthquake: Seismic image of the source zone and its implications for the rupture nucleation, J. Geophys. Res., 103(B5), 9967–9986, 1998.

    Article  Google Scholar 

  • Zhao, D., A. Hasegawa, and S. Horiuchi, Tomographic imaging of P and W wave velocity structure beneath Northeastern Japan, J. Geophys. Res., 97, 19909–19928, 1992.

    Article  Google Scholar 

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Correspondence to Yukio Fujinawa.

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Fujinawa, Y., Kawakami, N., Inoue, J. et al. Conductivity distribution and seismicity in the northeastern Japan Arc. Earth Planet Sp 54, 629–636 (2002).

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  • Mountain Range
  • Lower Crust
  • Seismic Velocity
  • Central Basin
  • Conductivity Distribution