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Fault model of the 2007 Noto Hanto earthquake estimated from PALSAR radar interferometry and GPS data

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Abstract

The 2007 Noto Hanto earthquake (Mw 6.6) is the first major earthquake in inland Japan since the launch of the Japanese ALOS satellite. Interferometric synthetic aperture radar successfully mapped the coseismic displacements from both ascending and descending orbits in and around the earthquake epicentral region. The line-of-sight displacements toward the satellite from the ascending and descending orbits amount to about 50 and 20 cm, respectively. The interferograms as well as the GPS data of the GEONET network are inverted in order to determine the slip distribution on the source fault. The dip and strike angles of the preferred model are 48° and N51°E, respectively, and its fault slip area reaches the seafloor. The dip angle is not well constrained in our tested range between 40° and 60°. The dominant slip area is located just above the hypocenter, at depths between 4 and 10 km. Many aftershocks seem to have occurred on and around the area of dominant slip.

References

  1. Akaike, H., Likelihood and Bayes procedure, in Baysian Statistics, edited by J. M. Bernardo et al., 143–166, Univ. Press, Valencia, Spain, 1980.

  2. Geographical Survey Institute, On the crustal deformations associated with the 2007 Noto Peninsula earthquake, http://cais.gsi.go.jp/HENDOU/index27.html, 2007.

  3. Hanssen, R. F., Radar Interferometry—Data Interpretation and Error Analysis, Kluwer Academic Publishers, 2001.

  4. Hashimoto, M., H. Takahashi, R. Doke, M. Kasahara, A. Takeuchi, K. Onoue, Y. Hoso, Y. Fukushima, K. Nakamura, F. Ohya, R. Honda, M. Ichiyanagi, T. Yamaguchi, T. Maeda, and Y. Hiramatsu, Postseismic displacements following the 2007 Noto peninsula earthquake detected by dense GPS observation, Earth Planets Space, 60, this issue, 139–144, 2008.

  5. Ishiwatari, A., Y. Hiramatsu, K. Koizumi, H. Tsuchihashi, and Y. Kono, Fault outcrops and tombstone fall-down rates of the 2007 Noto-hanto Earthquake, central Japan, Japan Geoscience Union Meeting, Z255–P027, 2007.

  6. Ito, K., H. Wada, K. Watanabe, H. Horikawa, T. Tsukuda, and K. Sakai, 1993 off Noto Peninsula earthquake, Annuals. Disas. Prev. Res. Inst., Kyoto Univ., 37, 325–341, 1994 (in Japanese).

  7. Menke, W., Geophysical Data Analysis: Discrete Inverse Theory, revised edition, Academic Press, Inc., 1989.

  8. NASA Landsat Program, Landsat ETM+ scene L7CPF20000401 20000630_08, USGS, Sioux Falls, 6/15/2000, 2004.

  9. Okada, Y., Surface deformation due to shear and tensile faults in a halfspace, Bull. Seismol. Soc. Am., 75, 1135–1154, 1985.

  10. Rosen, P. A., S. Hensley, H. A. Zebker, F. H. Webb, and E. J. Fielding, Surface deformation and coherence measurements of Kilauea Volcano, Hawaii, from SIR C radar interferometry, J. Geophys. Res., 101(E10), 23,109–23,126, 1996.

  11. Sambridge, M., Geophysical inversion with a neighbourhood algorithm—I. Searching a parameter space, Geophys. J. Int., 138, 479–494, 1999.

  12. Samet, H. and R. E. Webber, Hierarchical data structures and algorithms for computer graphics. I. Fundamentals, IEEE Comput. Graphics Appl., 8(3), 48–68, 1988.

  13. Tsukuda, T., H. Wada, K. Sakai, and K. Ito, Aftershock distribution of the 1993 M6.6 earthquake off Noto peninsula and its relation to tectonic features, Bull. Earthquake Res. Inst. Univ. Tokyo, 69, 1–18, 1994.

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Correspondence to Yo Fukushima.

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Fukushima, Y., Ozawa, T. & Hashimoto, M. Fault model of the 2007 Noto Hanto earthquake estimated from PALSAR radar interferometry and GPS data. Earth Planet Sp 60, 99–104 (2008) doi:10.1186/BF03352768

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Key words

  • Slip distribution
  • Noto Hanto earthquake
  • ALOS
  • PALSAR
  • SAR interferometry
  • GEONET
  • GPS