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Source process of the 2007 Niigata-ken Chuetsu-oki earthquake derived from near-fault strong motion data
Earth, Planets and Space volume 60, pages1131–1135(2008)
The 2007 Niigata-ken Chuetsu-oki earthquake generated strong ground motions in Kashiwazaki and Kariwa, where the world largest nuclear power plant was in operation. Due to the complexity of the aftershock distribution, activation of the northwest-dipping fault and/or the southeast-dipping fault is proposed. To explore the fault geometry and source process of the earthquake, we performed multi-time window linear waveform inversions for both the fault planes from near-fault strong motion data. A fault plane model of 30 km in length by 24 km in width was set to cover the region of aftershock distribution within 24 h of the mainshock. Both inverted slip models provided moment magnitudes of 6.7 with a small asperity near the rupture starting point, and a large asperity approximately 10 km southwest of the rupture initiation, which is located in the region of relatively sparse aftershock distribution. Both the small and large asperities are located near the intersection between the two conjugate fault plane models, and the asperities of both models have similar radiation patterns. Therefore, the difference of the residuals between the observed and synthetic waveforms for both models was not significant, indicating that it is difficult to conclude which fault is the rupture.
Abrahamson, N. A. and P. G. Somerville, Effects of the hanging wall and footwall on ground motions recorded during the Northridge earthquake, Bull. Seismol. Soc. Am., 86, S93–S99, 1996.
Akaike, H., Likelihood and the Bayes procedure, in Bayesian statistics, edited by J. M. Bernardo, M. H. DeGroot, and A. F. M. Smith, 143–166, University Press, Valencia, Spain, 1980.
Aoi, S. and N. Morikawa, Strong ground motions and rupture process of the 2007 Niigata-ken Chuetsu-oki earthquake, Proceedings of the 35th Symposium of Earthquake Ground Motion, AIJ, 41–46, 2007 (in Japanese with English abstract).
Aoi, S., K. Obara, S. Hori, K. Kasahara, and Y. Okada, New Strong-Motion Observation Network: KiK-net, Eos Trans. AGU, 81, 329, 2000.
Aoi, S., T. Kunugi, and H. Fujiwara, Strong-motion seismograph network operated by NIED: K-NET and KiK-net, J. Jpn. Assoc. Earthq. Eng., 4, 65–74, 2004.
Bouchon, M., A simple method to calculate Green’s function for elastic layered media, Bull. Seismol. Soc. Am., 71, 959–971, 1981.
Earthquake Research Committee, Headquarters for Earthquake Research Promotion, Evaluation of the 2007 Niigataken Chuetsuoki earthquake, http://www.jishin.go.jp/main/chousa/08janchuetsuoki/index.htm, 2008 (in Japanese).
Fukuyama, E., M. Ishida, S. Hori, S. Sekiguchi, and S. Watada, Broadband seismic observation conducted under the FREESIA Project, Rep. Nat’l. Res. Inst. Earth Sci. Disas. Prev., 57, 23–31, 1996.
Geographical Survey Institute, Crustal deformation and fault model associated with the Niigataken Chuetsu-oki earthquake in 2007 (part 1), Seismol. Soc. Jpn. Programme. Abstr. Fall Meeting, A11–02, 2007 (in Japanese).
Hartzell, S. H. and T. H. Heaton, Inversion of strong ground motion and teleseismic waveform data for the fault rupture history of the 1979 Imperial Valley, California, earthquake, Bull. Seismol. Soc. Am., 73, 1553–1583, 1983.
Hirata, N., H. Sato, S. Sakai, and A. Kato, Source fault of the 2007 Niigata-ken Chuetsu-oki earthquake, Sci. J. Kagaku, 77, 930–934, 2007 (in Japanese).
Japan Meteorological Agency, Outline of the Niigataken Chuetsu-oki earthquake in 2007, Seismol. Soc. Jpn. Programme. Abstr. Fall Meeting, A11–01, 2007 (in Japanese).
Kennett, B. L. and N. J. Kerry, Seismic waves in a stratified half space, Geophys. J. R. Astr. Soc., 57, 557–583, 1979.
Kinoshita, S., Kyoshin Net (K-NET), Seismol. Res. Lett., 69, 309–332, 1998.
Lawson, C. L. and R. J. Hanson, Solving Least Squares Problems, 340 pp., Prentice-Hall Inc., New Jersey, 1974.
Matsumoto, T., H. Matsubayashi, and T. Kazakami, F-net moment tensor solutions on the Niigataken Chuetsu-oki earthquake, Seismol. Soc. Jpn. Programme. Abstr. Fall Meeting, P1–088, 2007 (in Japanese).
Obara, K., Hi-net: High sensitivity seismograph network, Japan, Lecture Notes in Earth Sciences, 98, 79–88, 2003.
Sekiguchi, H., K. Irikura, and T. Iwata, Source inversion for estimating continuous slip distribution on the fault, —Introduction of Green’s functions convolved with a correction function to give moving dislocation effects in subfaults—, Geophys. J. Int.,150, 377–391, 2002.
Shinohara, M., T. Kanazawa, T. Yamada, K. Nakahigashi, S. Sakai, R. Hino, Y. Murai, A. Yamazaki, K. Obana, Y. Ito, K. Iwakiri, R. Miura, Y. Machida, K. Mochizuki, K. Uehira, M. Tahara, A. Kuwano, S. Amamiya, S. Kodaira, T. Takanami, Y. Kaneda, and T. Iwasaki, Precise aftershock distribution of the 2007 Chuetsu-oki Earthquake obtained by using an ocean bottom seismometer network, Earth Planets Space, 60, this issue, 1121–1126, 2008.
Si, H. and S. Midorikawa, New attenuation relationships for peak ground acceleration and velocity considering effect of fault type and site condition, J. Struct. Constr. Eng., AIJ, 523, 63–70, 1999 (in Japanese with English abstract).
Waldhauser, F. and W. L. Ellsworth, A double-difference earthquake location algorithm: Method and application to the northern Hayward fault, Bull. Seismol. Soc. Am., 90, 1353–1368, 2000.
Yoshida, N., H. Goto, K. Wakamatsu, S. Aoi, S. Fukumoto, and T. Mikami, Investigation on Record at K-NET Kashiwazaki during the 2007 Niigataken-chuetsu-oki earthquake, gakuin.ac.jp/yoshida/inform/chuetsuoki/k-net-e.pdf, 2007.
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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Aoi, S., Sekiguchi, H., Morikawa, N. et al. Source process of the 2007 Niigata-ken Chuetsu-oki earthquake derived from near-fault strong motion data. Earth Planet Sp 60, 1131–1135 (2008) doi:10.1186/BF03353149
- Source process
- waveform inversion
- 2007 Niigata-ken Chuetsu-oki earthquake
- near-fault strong