Abstract
The 2004 off the Kii Peninsula earthquake excited long-period ground motions over a wide area of Honshu Island of Japan. This remarkable excitation was observed in the Osaka, Nobi, and Kanto basins as well as in the Omaezaki region. The record section indicates two types of developed long-period motions by the basin surface waves, either by the source or passage effect of the shallow and large offshore earthquake. Their combination resulted in the well-developed long-period ground motions observed within the distant basins as those during the 1985 Michoacan and 2003 Tokachi-oki earthquakes did. The distributions of pseudo-velocity response spectra confirmed this development at periods of 5–7 s in the Osaka and Nobi basins and of 7–10 s in the Kanto basin. The comparison of the distributions with the thicknesses of the sediments and the S-wave velocities of the surface layers shows that these characteristics of the long-period ground motions are closely related to the structures of the basins. The earthquake provided a timely warning of damaging long-period ground motions from future megathrust events in the Tonankai, Nankai, and Tokai regions.
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References
Afnimar, K. Koketsu, and K. Nakagawa, Joint inversion of refraction and gravity data for the three-dimensional topography of a sedimentbasement interface, Geophys. J. Int., 151, 243–254, 2002.
Afnimar, K. Koketsu, and M. Komazawa, 3-D structure of the Kanto basin, Japan from joint inversion of refraction and gravity data, IUGG 2003 Scientific Program and Abstracts, SS04/07A/A03-002, B.487, 2003.
Aichi Prefecture, Underground Structure of the Nobi Basin, 174 pp, 2002.
Aoi, S., K. Obara, S. Hori, K. Kasahara, and Y. Okada, New strong-motion observation network: KiK-net, EOS Trans. Am. Geophys. Union, 81, Fall Meet. Suppl., S71A–05, 2000.
Beck, J. L. and J. F. Hall, Factors contributing to the catastrophe in Mexicocity during the earthquake of September 19, 1985, Geophys. Res. Lett., 13, 593–596, 1986.
Earthquake Research Committee, On the long-term evaluation of earthquakes in the Nankai trough, http://www.jishin.go.jp/main/chousa/01sepnankai/index.htm, 2001.
Frankel, A. D., S. Hough, P. Friberg, and R. Busby, Observations of Loma Prieta aftershocks from a dense seismic array in Sunnyvale, California, Bull. Seism. Soc. Am., 81, 1900–1922, 1991.
Frankel, A. D., D. Carver, E. Cranswick, T. Bice, R. Sell, and S. Hanson, Observations of basin ground motions from a dense seismic array in San Jose, California, Bull. Seism. Soc. Am., 91, 1–12, 2001.
Hatayama, K., K. Matsunami, T. Iwata, and K. Irikura, Basin-induced Love waves in the eastern part of the Osaka basin, J. Phys. Earth, 43, 131–155, 1995.
Hayakawa, T., T. Furumura, and Y. Yamanaka, Simulation of strong ground motions caused by the 2004 off the Kii peninsula earthquakes, Earth Planets Space, 57, this issue, 191–196, 2005.
Housner, G. W., Behavior of structures during earthquakes, J. Eng. Mechanics Div., Proc. Am. Soc. Civil Eng., 85, EM4, 109–129, 1959.
Japan Meteorological Agency, On Seismic Intensity, Gyosei, Tokyo, 238 pp., 1996.
Japan Meteorological Agency, Monitoring of earthquakes and volcanic activities and tsunami forecasting, http://www.jma.go.jp/JMAHP/jma/jma-eng/activities/seismo.html, 2004.
Kinoshita, S., Kyoshin Net (K-NET), Seism. Res. Lett., 69, 309–332, 1998.
Kodaira, S., T. Iidaka, A. Kato, J.-O. Park, T. Iwasaki, and Y. Kaneda, High pore fluid pressure may cause silent slip in the Nakai trough, Science, 304, 1295–1298, 2004.
Koketsu, K. and M. Kikuchi, Propagation of seismic ground motion in the Kanto basin, Science, 288, 1237–1239, 2000.
Koketsu, K., K. Hatayama, T. Furumura, Y. Ikegami, and S. Akiyama, Damaging long-period ground motions from the 2003 Mw 8.3 Tokachioki, Japan, earthquake, Seism. Res. Lett., 76, 67–73, 2005.
Lay, T., L. Astiz, H. Kanamori, and D. H. Christensen, Temporal variation of large intraplate earthquakes in coupled subduction zones, Phys. Earth Planet. Inter., 54, 258–312, 1989.
Sakai, Y., A. Kato, T. Kusuda, T. Ishizaki, and K. Asao, Long-period ground motion observed in the Chiba prefecture and its vicinity—from the observations of the September 5, 2004 off Kii-peninsula earthquake, Summ. Tech. Pap. Ann. Meet. Jpn. Assoc. Earthq. Eng., S–2–03, 2005.
Seismic Kanto Research Group, Elucidating strong ground motion in the Tokyo metropolitan area: Comprehensive strong motion network and the Seismic Kanto project, Shinsai Yobo (Earthquake Disaster Prevention), No. 184, 22–25, 2002.
Tsuno, S., M. Yoshikawa, T. Uetake, and K. Kudo, S-wave velocity structures in the southern Shizuoka prefecture determined by dispersion of surface waves of microtremors and strong motion data, Summ. Tech. Pap. Ann. Meet. Archit. Inst. Jpn., No. 21135, 2003.
Yamada, N. and T. Iwata, Long-period ground motion simulation in the Kinki area during the MJ 7.1 foreshock of the 2004 off the Kii peninsula earthquakes, Earth Planets Space, 57, this issue, 197–202, 2005.
Yamanaka, H. and N. Yamada, Estimation of 3D S-wave velocity model of deep sedimentary layers in Kanto plain, Japan, using microtremor array measurements, Butsuri-Tansa (Geophys. Expl.), 55, 53–65, 2002.
Wessel, P. and W. H. F. Smith, New version of the Generic Mapping Tools released, EOS Trans. Am. Geophys. Union, 76, 329, 1995.
Zama, S., Characteristics of long-period ground motions in Tokyo Bay area, Japan, Proc. 10th World Conf. Earthq. Eng., 2, 593–598, 1992.
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Miyake, H., Koketsu, K. Long-period ground motions from a large offshore earthquake: The case of the 2004 off the Kii peninsula earthquake, Japan. Earth Planet Sp 57, 203–207 (2005). https://doi.org/10.1186/BF03351816
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DOI: https://doi.org/10.1186/BF03351816