Special Issue: Special Section for the 2007 Chuetsu-oki, Niigata, Japan, Earthquake
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Coseismic and postseismic deformation related to the 2007 Chuetsu-oki, Niigata Earthquake
Earth, Planets and Space volume 60, pages 1081–1086 (2008)
An intermediate-strength earthquake of magnitude Mj 6.8 occurred on July 16, 2007, centered beneath the Japan Sea a few kilometers offshore of Niigata Prefecture in central Japan. We constructed a dense GPS network to investigate postseismic deformation after this event, choosing our GPS sites carefully so as to complement the nationwide GPS GEONET array. Coseismic displacements caused by the mainshock detected at some GEONET sites were used to estimate coseismic fault parameters. The results indicate that the geodetic data can be explained by a combination of two rectangular faults dipping northwest and southeast. Minor but definite postseismic deformation was detected largely in the southern part of the dense network. The time series of site coordinates can be characterized by a logarithmic decay function, and the estimated time constant seems to be almost similar in range to that of the 2004 Mid-Niigata Prefecture Earthquake. We also found a possible site instability at 960566 (Izumo-zaki, GEONET) caused by a small, local landslide associated with the mainshock and therefore concluded that the data obtained at this site should not be used for coseismic or postseismic analysis.
Geographical Survey Institute (GSI), Crustal deformation associated with 2007 Niigataken Chuetsu-oki earthquake, http://www.gsi.go.jp/WNEW/PRESS-RELEASE/2007/0719b.htm, 2007 (in Japanese).
Hugentobler, U., S. Schaer, and P. Fridez, Bernese GPS Software Version 4.2, 515 pp., University of Bern, 2001.
Iinuma, T., Y. Ohta, S. Miura, 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, Postseismic slip associated with the 2007 Chuetsu-oki, Niigata, Japan, Earthquake (M 6.8 on 16 July 2007) as inferred from GPS data, Earth Planets Space, 60, this issue, 1087–1091, 2008.
Kato, A., S. Sakai, E. Kurashimo, T. Igarashi, T. Iidaka, N. Hirata, T. Iwasaki, T. Kanazawa, and Group for the aftershock observations of the 2007 Niigataken Chuetsu-oki Earthquake, Imaging heterogeneous velocity structures and complex aftershock distributions in the source region of the 2007 Niigataken Chuetsu-oki Earthquake by a dense seismic observation, Earth Planets Space, 60, this issue, 1111–1116, 2008.
Lichten, S. M. and J. S. Border, Strategies for high precision global positioning system orbit determination, J. Geophys. Res., 92(B12), 12751–12762, 1987.
Marone, C. J., C. H. Scholz, and R. Bilham, On the mechanics of earthquake afterslip, J. Geophys. Res., 96, 8441–8452, 1991.
Nakao, S., H. Takahashi, T. Matsushima, Y. Kohno, and M. Ichiyanagi, Postseismic deformation following the 2005 West Off Fukuoka Prefecture Earthquake (M 7.0) derived by GPS observation, Earth Planets Space, 58, 1617–1620, 2006.
Okada, T., N. Umino, T. Matsuzawa, J. Nakajima, N. Uchida, T. Nakayama, S. Hirahara, T. Sato, S. Hori, T. Kono, Y. Yabe, K. Ariyoshi, S. Gamage, J. Shimizu, J. Suganomata, S. Kita, S. Yui, M. Arao, S. Hondo, T. Mizukami, H. Tsushima, T. Yaginuma, A. Hasegawa, Y. Asano, H. Zhang, and C. Thurber, Aftershock distribution and 3D seismic velocity structure in and around the focal area of the 2004 mid Niigata prefecture earthquake obtained by applying double-difference tomography to dense temporary seismic network data, Earth Planets Space, 57, 435–440, 2005.
Okada, Y., Internal deformation due to shear and tensile faults in a halfspace, Bull. Seismol. Soc. Am., 82, 1018–1040, 1992.
Scholz, C. H., The Mechanics of Earthquakes and Faulting, Cambridge University Press, 1990.
Sagiya, T., S. Miyazaki, and T. Tada, Continuous GPS Array and Present-day Crustal Deformation of Japan, PAGEOPH, 157, 2303–2322, 2000.
Sagiya, T., M. Ohzono, S. Nisiwaki, Y. Ohta, T. Yamamuro, F. Kimata, and M. Sasaki, Postseismic Deformation Following the 2004 Mid-Niigata Prefecture Earthquake around the Southern Part of the Source Region, Zisin 2, 58, 359–369, 2005 (in Japanese with English abstract).
Takahashi, H., T. Matsushima, T. Kato, A. Takeuchi, T. Tamaguchi, Y. Kohno, T. Katagi, J. Fukuda, K. Hatamoto, R. Doke, Y. Matsu’ura, and M. Kasahara, A dense GPS observation immediately after the 2004 mid-Niigata prefecture earthquake, Earth Planets Space, 57, 661–665, 2005.
Wessel, P. and W. H. F. Smith, Free software helps map and display data, EOS Trans. AGU, 72, 441, 1991.
Zhang, H. and C. H. Thurber, Double-difference tomography: The method and its application to the Hayward fault, California, Bull. Seismol. Soc. Am., 93, 1875–1889, 2003.
Zumberge, J. F., M. B. Heflin, D. C. Jefferson, M. M. Watkins, and F. H. Webb, Precise point positioning for the efficient and robust analysis of GPS data from large networks, J. Geophys. Res., 102(B3), 5005–5017, 1997.
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Ohta, Y., Miura, S., Iinuma, T. et al. Coseismic and postseismic deformation related to the 2007 Chuetsu-oki, Niigata Earthquake. Earth Planet Sp 60, 1081–1086 (2008). https://doi.org/10.1186/BF03353140
- Crustal deformation
- coseismic slip
- postseismic deformation
- Niigata-Kobe Tectonic Zone