Skip to main content
Earth, Planets and Space
Download PDF

Volume 60 Supplement 2

Special Issue: Special Section for the 2007 Noto Hanto Earthquake (1)

Highly resolved distribution of aftershocks of the 2007 Noto Hanto Earthquake by a dense seismic observation

Earth, Planets and Space volume 60, pages 83–88 (2008)Cite this article

Abstract

The 2007 Noto Hanto Earthquake occurred on March 25, 2007, in the Noto Peninsula, central Japan. A half day after the main shock, we started installing temporary seismic stations in order to determine the precise locations of its aftershocks. Ten universities and two research institutes deployed 88 temporary seismic stations in and around the source area. The observation lasted for about 2 months. We relocated 1318 aftershocks with arrival time corrections at each station. The relocated hypocenters show relatively small errors—less than 0.2 km in the horizontal direction and less than 0.4 km depth. Most of the relocated hypocenters are about 2.0 km shallower than those determined by JMA. The distribution of the aftershocks forms a southeast-dipping plane. The main shock is located at the bottom part of their distribution. The precise aftershock distribution extends into a shallower area than the original, and it coincides with sea floor-ward extension of the active faults previously known from a sonic reflection survey. Heterogeneous distribution of the aftershocks on the fault plane shows low seismicity just above the main shock hypocenter, and middle-size aftershocks are distributed on the periphery of the main shock. A precursory event (M 4.4) that occurred 0.6 s before the main rupture is located close to the M 2.2 foreshock that occurred 12 min before it.

References

  • Douglas, A., Joint epicenter determination, Nature, 215, 47–48, 1967.

    Article  Google Scholar 

  • Hirata, N. and M. Matsu’ura, Maximum-likelihood estimation of hypocenter with origin time eliminated using nonlinear inversion technique, Phys. Earth Planet. Inter., 47, 50–61, 1987.

    Article  Google Scholar 

  • Hokuriku District Eng. Geol. Mapping Com., Engineering Geological Map and manual of Hokuriku District (1:200,000), Kokudo Kaihatsu Gijyutsu Center, 1990.

    Google Scholar 

  • Iio, Y., S. Matsumoto, T. Matsushima, K. Uehira, H. Katao, S. Ohmi, T. Shibutani, F. Takeuchi, K. Nishigami, B. Enescu, I. Hirose, Y. Kano, Y. Mamada, M. Miyazawa, K. Tatsumi, H. Wada, Y. Kohno, M. Korenaga, T. Ueno, and Y. Yukutake, Generating process of the 2004 Mid Niigata Prefecture Earthquake? Based on the results from the joint online aftershock observation, Zisin, 58, 463–475, 2006.

    Google Scholar 

  • Katagawa, H., M. Hamada, S. Yoshida, H. Kadosawa, A. Mitsuhashi, Y. Kono, and Y. Kinugasa, Geological development of the west sea area of the Noto Peninsula district in the Neogene Tertiary to Quaternary, central Japan, J. Geogr., 114, 791–810, 2005.

    Article  Google Scholar 

  • Kato, A., S. Sakai, T. Iidaka, T. Iwasaki, E. Kurashimo, T. Igarashi, N. Hirata, T. Kanazawa, and Group for the aftershock observations of the 2007 Noto Hanto Earthquake, Three-dimensional velocity structure in the source region of the Noto Hanto Earthquake in 2007 imaged by a dense seismic observation, Earth Planets Space, 60, this issue, 105–110, 2008.

    Article  Google Scholar 

  • Mikumo, T., H. Wada, and M. Koizumi, Seismotectonics of the Hida region, central Japan, Tectonophysics, 147, 95–119, 1988.

    Article  Google Scholar 

  • National Research Institute for Earth Science and Disaster Prevention (NIED), Earthquake mechanism information, http://www.hinet.bosai.go.jp/topics/niigata070716/, 2007.

  • Obara, K., S. Hori, K. Kasahara, Y. Okada, and S. Aoi, Hi-net: High sensitivity seismograph network in Japan, EOS Trans. AGU, 81(48), Fall Meet. Suppl., Abstract S71A-04, 2002.

    Google Scholar 

  • Sakai, S., N. Hirata, A. Kato, E. Kurashimo, T. Iwasaki, and T. Kanazawa, Multi-fault system of the 2004 Mid-Niigata Prefecture Earthquake and its aftershocks, Earth Planets Space, 57, 417–422, 2005.

    Article  Google Scholar 

  • Sakai, S., A. Kato, E. Kurashimo, T. Iidaka, T. Igarashi, N. Hirata, T. Iwasaki, T. Kanazawa, S. Watanabe, T. Haneda, M. Kobayashi, K. Miura, R. Miura, K. Tagami, I. Ogino, M. Saka, A. Watanabe, K. Miyakawa, K. Katsumata, H. Takahashi, M. Kasahara, R. Honda, T. Maeda, M. Ichiyanagi, T. Yamaguchi, M. Kosuga, T. Okada, J. Naka-jima, S. Hori, T. Nakayama, K. Nii, A. Hasegawa, T. Kono, S. Suzuki, N. Tsumura, R. Kobayashi, K. Nozaki, Y. Hiramatsu, K. Sugaya, A. Hayashi, T. Hirose, A. Sawada, K. Tanaka, Y. Yamanaka, H. Nakamichi, T. Okuda, Y. Iio, K. Nishigami, M. Miyazawa, H. Wada, N. Hirano, S. Nakao, H. Katao, S. Ohmi, K. Ito, T. Shibutani, Y. Kano, I. Doi, S. Noda, T. Katagi, Y. Nishitsuji, S. Matsumoto, K. Matsushima, A. Saiga, H. Miyamachi, K. Imanishi, Y. Kuwahara, I. Cho, M. Hoshino, T. Takeda, Y. Asano, Y. Yukutake, T. Ueno, T. Maeda, T. Matsuzawa, S. Sekine, M. Matsubara, and K. Obara, Aftershock observation for the Noto Hanto Earthquake in 2007, Bull. Earthq. Res. Inst., 2007 (in Japanese).

    Google Scholar 

  • Shinohara, M., N. Hirata, and S. Matsuda, Long-term low-power DAT seismic digital data recorder with GPS clock, Zisin, 50, 119–124, 1997 (in Japanese with English abstract).

    Google Scholar 

  • Urabe, T. and S. Tsukada, A workstation-assisted processing system for waveform data from microearthquake networks, Abstracts of Spring Meeting of Seismological Society of Japan, 70, 1991 (in Japanese).

  • Wessel, P. and W. H. F. Smith, New version of the generic mapping tools released, EOS Trans. AGU, 76, 329, 1995.

    Article  Google Scholar 

  • Woessner, J., D. Schorlemmer, S. Wiemer, and P. M. Mai, Spatial correlation of aftershock locations and on-fault main shock properties, J. Geophys. Res., 111, B08301, doi:10.1029/2005JB003961, 2006.

  • Yamada, T., K. Mochizuki, M. Shinohara, T. Kanazawa, A. Kuwano, K. Nakahigashi, R. Hino, K. Uehira, T. Yagi, N. Takeda, and S. Hashimoto, Aftershock observation of the Noto Hanto earthquake in 2007 using ocean bottom seismometers, Earth Planets Space, 2008 (submitted).

    Google Scholar 

  • Yamanaka, Y., EIC Seismological Note, http://www.eri.u-tokyo.ac.jp/sanchu/Seismo Note/2007/EIC185.html, 2007 (in Japanese).

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Earthquake Research Institute, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-0032, Japan

    Shin’ichi Sakai, Aitaro Kato, Takashi Iidaka, Takaya Iwasaki, Eiji Kurashimo, Toshihiro Igarashi, Naoshi Hirata & Toshihiko Kanazawa

Authors
  1. Shin’ichi Sakai
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Aitaro Kato
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Takashi Iidaka
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Takaya Iwasaki
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. Eiji Kurashimo
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. Toshihiro Igarashi
    View author publications

    You can also search for this author in PubMed Google Scholar

  7. Naoshi Hirata
    View author publications

    You can also search for this author in PubMed Google Scholar

  8. Toshihiko Kanazawa
    View author publications

    You can also search for this author in PubMed Google Scholar

Consortia

group for the joint aftershock observation of the 2007 Noto Hanto Earthquake

Corresponding author

Correspondence to Shin’ichi Sakai.

Rights and permissions

Open Access  This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made.

The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.

To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/.

Reprints and permissions

About this article

Cite this article

Sakai, S., Kato, A., Iidaka, T. et al. Highly resolved distribution of aftershocks of the 2007 Noto Hanto Earthquake by a dense seismic observation. Earth Planet Sp 60, 83–88 (2008). https://doi.org/10.1186/BF03352765

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1186/BF03352765

Key words