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Deep borehole observation of the Earth's crust activities around Tokyo-introduction of the Iwatsuki observatory

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Summary

As a part of the Japanese earthquake prediction programme, deep borehole observation of the earth's crustal activities has been planned in and around Tokyo by the National Research Center for Disaster Prevention. The first place selected was in the city of Iwatsuki, about 30 km from the centre of Tokyo. Starting in 1970, the main construction was completed at the end of 1973. The tentative observation of micro-earthquakes and crustal movement by tiltmeters has been carried out since May, 1973. As expected, noise at the bottom of the hole (3500 m depth) is extremely small, about 1/1000–1/300 of that at the surface. We could, possibly, detect earthquakes with magnitudes greater than 2.0 within 50 km radius from the Iwatsuki observatory.

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References

  • O. Fukuda,Test boring at the Kasukabe region in the southern part of Kwanto district (Preannouncement). Geology Monthly100 (1962), 1–16 (in Japanese).

    Google Scholar 

  • T. Hirono, S. Suyehiro, M. Furuta andK. Sato,Noise attenuation in shallow holes (II)-Improvement of signal to noise ratio, Papers in Meteorology and Geophysics20 (1969), 189–206.

    Google Scholar 

  • K. Kaminuma, T. Iwata, I. Kayano andM. Ohtake,Illustrations of earthquakes in Japan, Quick research report. Earthq. Res. Inst.9 (1973), 135 (in Japanese).

    Google Scholar 

  • H. Takahashi, M. Takahashi andH. Suzuki,Studies on the underground structures of the Matsushiro earthquake area by test boring. Notes of cooperative research for disaster prevention, National Research Center for Disaster Prevention5 (1967), 57–69.

    Google Scholar 

  • H. Takahashi, O. Fukuda, N. Oyagi, Y. Fujita andK. Ogusa,Geology of the Tokyo deep-bore-hole observation site, Abstract of the Joint Meeting of the Five Japanese Societies of Geology and its Relations,424 (1971) (in Japanese).

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Authors and Affiliations

  1. National Research Center for Disaster Prevention, Ginza 6-15-1, Chuo-ku, Tokyo, Japan

    Hiroshi Takahashi (Head of the Second Research Division) & Kazuo Hamada (Chief of the Earthquake Prediction Laboratory)

Authors
  1. Hiroshi Takahashi
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  2. Kazuo Hamada
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Takahashi, H., Hamada, K. Deep borehole observation of the Earth's crust activities around Tokyo-introduction of the Iwatsuki observatory. PAGEOPH 113, 311–320 (1975). https://doi.org/10.1007/BF01592920

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  • DOI: https://doi.org/10.1007/BF01592920

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