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Coseismic deformation of the 2007 Chuetsu-oki earthquake derived from PALSAR/InSAR and its fault model
Earth, Planets and Space volume 60, pages1099–1104(2008)
The 2007 Chuetsu-oki earthquake (Mj 6.8) occurred offshore of Niigata Prefecture, northeast Japan, on 16 July 2007. I applied PALSAR/InSAR to detect coseismic deformation associated with the earthquake. The interferogram generated from descending data revealed a slant-range shortening exceeding 20 cm in the coastal area of Kashiwazaki adjacent to the epicenter and a maximum slant range extension of approximately 15 cm southeast of the slant-range shortening pattern. The interferogram generated from descending data is consistent with GPS displacements, but the non-crustal deformation component was large in the interferogram generated from ascending data. Based on a fault plane dipping to the southeast, a fault-slip distribution was estimated from the descending interferogram and GPS displacements. The largest fault-slip was located in the southwestern deeper part of the mainshock hypocenter. In the northern part of the focal region, the fault-slip was dominant at depths of 5–15 km, but it was limited to shallower depths in the southern part of the focal region. Such fault-slip distribution is consistent with the aftershock distribution. This consistency supports the assumption that the fault rupture in the mainshock has primarily occurred in the nodal plane dipping to the southeast.
Akaike, H., Likelihood and Bayes procedure, in Baysian Statistics, edited by J. M. Bernardo et al., 143–166, Univ. Press, Valencia, Spain, 1980.
Fielding, E. J., T. J. Wright, J. Muller, B. E. Parsons, and R. Walker, Aseismic deformation of a fold-and-thrust belt imaged by synthetic aperture radar interferometry near Shahdad, southeast Iran, Geol., 32, 577–580, 2004.
Goldstein, R., Atmospheric limitations to repeat-track radar interferometry, Geophys. Res. Lett., 22, 2517–2520, 1995.
Goldstein, R. and C. L. Werner, Radar interferogram filtering for geophysical applications, Geophys. Res. Lett., 25, 4035–4038, 1998.
Massonnet, D. and K. L. Feigl, Discrimination of geophysical phenomena in satellite radar interferograms, Geophys. Res. Lett., 22, 1537–1540, 1995.
Matsumoto, T., H. Matsubayashi, and T. Kazakami, F-net Moment Tensor Solutions on The Niigataken Chuetsu-oki Earthquake in 2007, Abst. Seismol. Soc. Japan, P01–088, 2007.
Nishimura, T., M. Tobita, H. Yarai, T. Amagai, M. Fujiwara, H. Une, and M. Koarai, Episodic growth of fault-related fold in northern Japan observed by SAR interferometry, Geophys. Res. Lett., 35, doi:10.1029/ 2008GL034337, 2008 (in press).
Ohta, Y., S. Miura, T. Iinuma, K. Tachibana, T. Matsushima, H. Takahashi, T. Sagiya, T. Ito, S. Miyazaki, R. Doke, A. Takeuchi, K. Miyao, A. Hirao, T. Maeda, T. Yamaguchi, M. Takada, M. Iwakuni, T. Ochi, I. Meilano, and A. Hasegawa, Coseismic and postseismic deformation related to the 2007 Chuetsu-oki, Niigata Earthquake, Earth Planets Space, 60, this issue, 1081–1086, 2008.
Okada, Y., Surface deformation due to shear and tensile faults in a half-space, Bull. Seismol. Soc. Am., 75, 1135–1154, 1985.
Rosen, P. A., S. Hensley, H. A. Zebker, and F. H. Webb, Surface deformation and coherence measurements of Kilauea Volcano, Hawaii, from SIR-C radar interferometry, J. Geophys. Res., 101, 23109–23125, 1996.
Sagiya, T., S. Miyazaki, and T. Tada, Continuous GPS array and present-day crustal deformation of Japan, PAGEOPH, 157, 2303–2322, 2000.
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.
Wessel, P. and W. H. F. Smith, New improved version of generic mapping tolls released, EOS Trans. AGU, 79-47, 579, 1998.
Yukutake, Y., T. Takeda, and K. Obara, Well-resolved hypocenter distribution using the double-difference relocation method in the region of the 2007 Chuetsu-oki Earthquake, Earth Planets Space, 60, this issue, 1105–1109, 2008.
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Ozawa, T. Coseismic deformation of the 2007 Chuetsu-oki earthquake derived from PALSAR/InSAR and its fault model. Earth Planet Sp 60, 1099–1104 (2008) doi:10.1186/BF03353143
- 2007 Chuetsu-oki earthquake
- coseismic deformation
- fault model