Skip to main content

Source model of the 2007 Noto-Hanto earthquake (Mw 6.7) for estimating broad-band strong ground motion


A source model for estimating broad-band ground motions from the 2007 Noto-Hanto earthquake (Mw 6.7) is estimated from a comparison of the observed records of the mainshock and synthesized motions based on the characterized asperity model using the empirical Green’s function method. The observed records of aftershocks used as the empirical Green’s functions are carefully selected to have almost the same radiation characteristics and source distance as the asperities of the mainshock. The best-fit source model consists of two asperities of different size. A large one is located just above the hypocenter, with an area of 6.3×6.3 km2 and stress drop of about 26 MPa. A smaller one is located north-east of the large one, with an area of 3.6×3.6 km2 and stress drop of about 10 MPa. The stress drop of the large one is about twofold higher than the average values of inland crustal earthquakes so far estimated, while that of smaller one is almost average. We found that the remarkable directivity pulses from the source model struck the northern part of the Noto peninsula, causing heavy damage in some towns there.


  1. Aoi, S. and H. Sekiguchi, Rupture process of the 2007 Noto-Hanto earthquake obtained from strong motion data,, 2007 (in Japanese).

    Google Scholar 

  2. Earthquake Research Institute, The University of Tokyo, The Noto Hanto Earthquake in 2007,, 2007 (in Japanese).

    Google Scholar 

  3. Fire and Disaster Management Agency, On March 25, 2007 Noto-Hanto Earthquake,, 2007 (in Japanese).

    Google Scholar 

  4. Horikawa, H., Source rupture process of 2007 Noto-Hanto Earthquake,, 2007 (in Japanese).

    Google Scholar 

  5. Irikura, K., Prediction of strong acceleration motions using empirical Green’s function, Proc. 7th Japan Earthq. Eng. Symp., 151–156, 1986.

    Google Scholar 

  6. Kamae, K. and K. Irikura, Source model of the 1995 Hyogo-ken Nanbu earthquake and simulation of near-source ground motion, Bull. Seism. Soc. Am., 88, 400–415, 1998.

    Google Scholar 

  7. Kamae, K., K. Irikura, and Y. Fukuchi, Prediction of strong ground motion for M7 earthquake using regional scaling relations of source parameters, J. Struct. Constr. Eng., AIJ., 416, 57–70, 1990 (in Japanese with English abstract).

    Google Scholar 

  8. 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 

  9. Miyake, H., T. Iwata, and K. Irikura, Strong ground motion simulation and source modeling of the Kagoshima-ken Hokuseibu Earthquake of March 26 (MJMA 6.5) and May 13 (MJMA 6.3), 1997 using empirical Green’s function method, Zisin (J. Seism. Soc. Jpn.), 51, 431–442, 1999.

    Google Scholar 

  10. Miyake, H., T. Iwata, and K. Irikura, Source characterization for broadband ground-motion simulation, Kinematic heterogeneous source model and strong motion generation area, Bull. Seism. Soc. Am., 93, 2531–2545, 2003.

    Article  Google Scholar 

  11. National Research Institute for Earth Science and Disaster Prevention, NIED Seismic Moment Tensor Catalogue,, 2007.

    Google Scholar 

  12. Tsurugi, M., M. Tai, K. Irikura, and A. Kowada, Estimation of empirical site amplification effects using observed records, Zisin, 50, 215–227, 1997 (in Japanese with English abstract).

    Google Scholar 

  13. Wessel, P. and W. H. F. Smith, New, improved version of Generic Mapping Tools released, EOS, 79, 579, 1998.

    Article  Google Scholar 

  14. Yamanaka, Y, EIC seismological note, 185, Note/2007/EIC185.html, 2007 (in Japanese).

Download references

Author information



Corresponding author

Correspondence to Susumu Kurahashi.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Kurahashi, S., Masaki, K. & Irikura, K. Source model of the 2007 Noto-Hanto earthquake (Mw 6.7) for estimating broad-band strong ground motion. Earth Planet Sp 60, 89–94 (2008).

Download citation

Key words

  • Broad-band strong ground motion
  • empirical Green’s function method
  • 2007 Noto-Hanto earthquake
  • selection of aftershock records as EGF
  • source model