Skip to main content

Volume 60 Supplement 10

Special Issue: Special Section for the 2007 Noto Hanto Earthquake (2)

Rupture process of the 2007 Noto Hanto earthquake: waveform inversion using empirical Green’s function

Abstract

A waveform inversion study was conducted to reveal the rupture process of the 2007 Noto Hanto, Japan, earthquake using near-source strong ground motion records. To avoid uncertainty in the subsurface structure in and around the source region when calculating Green’s functions, I used the aftershock records as empirical Green’s functions. To ensure that the path and the site effects are shared between the ground motions from the mainshock and those from aftershocks, the mainshock fault plane was divided into four domains, each of which was allocated to one of the aftershocks used as the empirical Green’s function events. The result of the inversion indicated that the rupture process included the break of two asperities. The first asperity, located close to the JMA hypocenter, was broken soon after the rupture started. This was followed by an extension of the rupture and the subsequent break of the second shallow asperity. The total moment of the mainshock was estimated to be 1.96E+19 N m, which is roughly consistent with the moment estimated by the F-net (1.36E+19 N m). Agreement between the observed and synthetic ground motions is quite satisfactory.

References

  • Fukuyama, E., M. Ishida, S. Hori, S. Sekiguchi, and S. Watada, Broadband seismic observation conducted under the FREESIA Project, Rep. Natl. Res. Inst. Earth Sci, Disas. Prev., 57, 23–31, 1996.

    Google Scholar 

  • Fukuyama, E., M. ishida, D. S. Dreger, and H. Kawai, Automated seismic moment tensor determination by using on-line broadband seismic waveforms, Zisin, 51, 149–156, 1998 (in Japanese with English abstract).

    Google Scholar 

  • Hartzell, S. H. and T. H. Heaton, Inversion of strong ground motion and teleseismic waveform data for the fault rupture history of the 1979 Imperial Valley, California, earthquake, Bull. Seismol. Soc. Am., 73, 1553–1583, 1983.

    Google Scholar 

  • Irikura, K., Semi-empirical estimation of strong ground motions during large earthquakes, Bull. Disaster Prevention Res. Inst., Kyoto Univ., 32, 63–104, 1983.

    Google Scholar 

  • Kamata, M. and M. Takemura, Source depth and focal mechanism of the 1993 Noto-Hanto-Oki earthquake and subsurface structures in and around Noto Peninsula derived from Rayleigh waves observed at local stations, Zisin, 52, 255–270, 1999 (in Japanese with English abstract).

    Google Scholar 

  • Kinoshita, S., Kyoshin Net (K-net), Seimol. Res. Lett., 69, 309–332, 1998.

    Article  Google Scholar 

  • Lawson, C. L. and R. J. Hanson, Solving Least Squares Problems, Prentice-Hall, Inc., Englewood Cliffs, New Jersey, 1974.

    Google Scholar 

  • Nakamura, H. and T. Miyatake, An approximate expression of slip velocity time function for simulation of near-field strong ground motion, Zisin, 53, 1–9, 2000 (in Japanese with English abstract).

    Google Scholar 

  • Nozu, A., Variable-slip rupture model for the 2004 Mid Niigata Prefecture (Niigata-ken Chuetsu) earthquake—waveform inversion with empirical Green’s functions—, Zisin, 58, 329–343, 2005 (in Japanese with English abstract).

    Google Scholar 

  • Nozu, A., Variable-slip rupture model for the 2005 West Off Fukuoka Prefecture, Japan, earthquake—waveform inversion with empirical Green’s functions—, Zisin, 59, 253–270, 2007 (in Japanese with English abstract).

    Article  Google Scholar 

  • Nozu, A., T. Nagao, and M. Yamada, Site amplification factors for strong-motion sites in Japan based on spectral inversion technique and their use for strong-motion evaluation, J. Jpn. Assoc. Earthq. Eng., 7, 215–234, 2007 (in Japanese with English abstract).

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Atsushi Nozu.

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

Nozu, A. Rupture process of the 2007 Noto Hanto earthquake: waveform inversion using empirical Green’s function. Earth Planet Sp 60, 1029–1034 (2008). https://doi.org/10.1186/BF03352864

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1186/BF03352864

Key words

  • The 2007 Noto Hanto earthquake
  • rupture process
  • empirical Green’s function