Abstract
Strong ground motions recorded in central Tokyo during the 1944 Tonankai Mw8.1 earthquake occurring in the Nankai Trough demonstrate significant developments of very large (>10 cm) and prolonged (>10 min) shaking of long-period (T>10–12 s) ground motions in the basin of Tokyo located over 400 km from the epicenter. In order to understand the process by which such long-period ground motions developed in central Tokyo and to mitigate possible future disasters arising from large earthquakes in the Nankai Trough, we analyzed waveform data from a dense nation wide strong-motion network (K-NET and KiK-net) deployed across Japan for the recent SE Off-Kii Peninsula (Mw 7.4) earthquake of 5 September 2004 that occurred in the Nankai Trough. The observational data and a corresponding computer simulation for the earthquake clearly demonstrate that such long-period ground motion is primarily developed as the wave propagating along the Nankai Trough due to the amplification and directional guidance of long-period surface waves within a thick sedimentary layer overlaid upon the shallowly descending Philippine Sea Plate below the Japanese Island. Then the significant resonance of the seismic waves within the thick cover of sedimentary rocks of the Kanto Basin developed large and prolonged long-period motions in the center of Tokyo. The simulation results and observed seismograms are in good agreement in terms of the main features of the long-period ground motions. Accordingly, we consider that the simulation model is capable of predicting the long-period ground motions that are expected to occur during future Nankai Trough M 8 earthquakes.
Published Online First: April 2, 2008
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References
Baba, T., Ito, A., Kaneda, Y., Hayakawa, T., and Furumura, T. (2006), 3D velocity structure model in the ocean around Japan inferred from controlled source seismic experiments, Abst., Japan Geoscience Union Meeting. 2006.
Furumura, T. and Hayakawa, T. (2007), Anomalous propagation of long-period ground motions observed in Tokyo during the 23 October 2004 Niigata-ken Chuetsu (Mw 6.6) earthquake, Bull. Seismol. Soc. Am. 97, 863–880.
Furumura, T. and Nakamura, M. (2006), Recovering of strong motion record of the 1944 Tonankai earthquake and long-period ground motion in Kanto region, Geophys Exploration 59, 337–351, in Japanese.
Furumura, T. and Kennett, B.L.N. (2005), Subduction zone guided waves and the heterogeneity structure of the subducting plate: Intensity anomalies in northern Japan, J. Geophys. Res., 110, B10302, dio:10.1029/2004JB003484.
Furumura, T., Kennett, B.L.N., and Koketsu, K. (2003), Visualization of 3D wave propagation from the 2000 Tottori-ken Seibu, Japan, Earthquake: Observation and numerical simulation, Bull. Seismol. Soc. Am. 93, 870–881.
Furumura, T. and Chen, L. (2005), Parallel simulation of strong ground motions during recent and histrical damaging earthquakes in Tokyo, Japan, Parallel Computing, 31, 149–165.
Hatayama, K., Zama, S., Nishi, H., Yamada, M., and Hirokawa, Y. (2004), Long-period strong ground motion and damage to oil storage tanks dur to the 2003 Tokachi-oki earthquake, Zisin 57, 83–103.
Hatayama, K., and Zama, S. (2005), Sloshing of liquid in oil storage tanks and long-period strong ground motions due to 2004 M 7-class earthquakes southeast off the Kii Peninsula, Report of National Research Institute of Fire and Disaster 99, 52–67.
Hayakawa, T., Furumura, F., and Yamanaka, Y. (2005), Simulation of strong ground motions caused by the 2004 off the Kii Peninsula earthquakes, Earth Planets Space 57, 191–196.
Kodaira, S., Iidaka, T., Nakanishi, A., Park, J.-O., Iwasaki, T., and Kaneda, Y. (2005), Onshore-offshore seismic transect from the eastern Nankai Trough to central Japan crossing a zone of the Tokai slow slip event, Earth Planets Space 57, 943–959.
Koketsu, K., Hatayama, K., Furumura, T., Ikegami, Y., and Akiyama, S. (2005), Damaging long-period ground motions from the 2003 Mw 8.3 Tokachi-oki, Japan, earthquake, Seismolol. Res. Lett. 76, 1, 67–73.
Miyake, H. and Koketsu, K. (2005), Long-period ground motions from a large offshore earthquake: The case of the 2004 off the Kii peninsula earthquake, Japan, Earth Planets Space 57, 3, 203–207.
Nakanishi, A., Takahashi, N., Park, J.-O. Park, Miura, S., Kodaira, S., Kaneda, Y., Hirata, N., Iwasaki, T., and Nakamura, M. (2002), Crustal structure across the coseismic rupture zone of the 1944 Tonankai earthquake, the central Nankai Trough seismogenic zone, J. Geophys. Res. 107, doi: 10.1029/2001JB000424.
Ryoki, K. (1999), Three-dimensional depth structure of the crust and upper-most mantle beneath southwestern Japan and its regional gravity anomalies, Zisin 52, 51–63.
Shapiro, N.M., Olsen, K.B., and Singh, S.K. (2000), Wave-guide effects in subduction zones: Evidence from three-dimensional modeling, Geophys. Res. Lett. 27, 433–436.
Takahashi, N., Kodaira, S., Nakanishi, A., Park, J.-O., Miura, S., Tsuru, T., Kaneda, Y., Suehiro, K., and Kinoshita, H. (2002), Seismic structure of western end of the Nankai Trough seismogenic zone, J. Geophys. Res. 107, doi: 10.1029/200JB000121.
Tanaka, Y., Miyake, H., Koketsu, K., Furumura, T., Hayakawa, T., Baba, T., Suzuki, H., and Masuda, T. (2006), The DaiDaiToku integrated model of the velocity structure beneath the Tokyo metropolitan area (2), Abst., Japan Geoscience Union Meet. 2006, S116–P014.
Usami, T., Materials of Comprehensive List of Destructive Earthquakes in Japan (University of Tokyo Press, 1996).
Yamanaka, Y. (2004a), Reanalysis of the 5 Sept. SE Off-Kii Peninsula earthquake (mainshock: Mj 7.4), EIC Seismological Note, Earthquake Research Institute, University of Tokyo, No. 153.
Yamanaka, Y. (2004b), Source process of the 1944 Tonankai and the 1945 Mikawa earthquake, Chikyu Monthly 305, 739–745.
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Furumura, T., Hayakawa, T., Nakamura, M., Koketsu, K., Baba, T. (2008). Development of Long-period Ground Motions from the Nankai Trough, Japan, Earthquakes: Observations and Computer Simulation of the 1944 Tonankai (Mw 8.1) and the 2004 SE Off-Kii Peninsula (Mw 7.4) Earthquakes. In: Tiampo, K.F., Weatherley, D.K., Weinstein, S.A. (eds) Earthquakes: Simulations, Sources and Tsunamis . Pageoph Topical Volumes. Birkhäuser Basel. https://doi.org/10.1007/978-3-7643-8757-0_8
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