Skip to main content

Advertisement

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

Article metrics

  • 207 Accesses

  • 9 Citations

Abstract

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.

References

  1. Aoi, S. and H. Sekiguchi, Rupture process of the 2007 Noto-Hanto earthquake obtained from strong motion data, http://www.k-net.bosai.go.jp/k-net/topics/noto070325/, 2007 (in Japanese).

  2. Earthquake Research Institute, The University of Tokyo, The Noto Hanto Earthquake in 2007, http://www.eri.u-tokyo.ac.jp/topics/noto20070325/yochiren/coco.html, 2007 (in Japanese).

  3. Fire and Disaster Management Agency, On March 25, 2007 Noto-Hanto Earthquake, http://www.fdma.go.jp/detail/710.html, 2007 (in Japanese).

  4. Horikawa, H., Source rupture process of 2007 Noto-Hanto Earthquake, http://unit.aist.go.jp/actfault/katsudo/jishin/notohanto/hakaikatei2.html, 2007 (in Japanese).

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

  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.

  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).

  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.

  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.

  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.

  11. National Research Institute for Earth Science and Disaster Prevention, NIED Seismic Moment Tensor Catalogue, http://www.fnet.bosai.go.jp, 2007.

  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).

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

  14. Yamanaka, Y, EIC seismological note, 185, http://www.eri.u-tokyo.ac.jp/sanchu/seismo Note/2007/EIC185.html, 2007 (in Japanese).

Download references

Author information

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) doi:10.1186/BF03352766

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