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Slip distribution of the 2003 Tokachi-oki earthquake estimated from tsunami waveform inversion
Earth, Planets and Space volume 56, pages373–376(2004)
The slip distribution of the 2003 Tokachi-oki earthquake is estimated from the 11 tsunami waveforms recorded at 9 tide gauges in the southern Hokkaido and eastern Tohoku coasts and two ocean bottom tsunami-meters (pressure gauges) off Kamaishi, Tohoku. The largest slip of 4.3 m is estimated on the subfault located off Hiroo. A large slip of 2.1 m is also estimated on the subfault located near Kushiro. The total seismic moment of the 2003 Tokachi-oki earthquake is 1.0 × 1021 Nm. The slip distribution estimated from the tsunami waveform inversion is similar to the slip distribution deduced by Yamanaka and Kikuchi (2003) from the inversion of the teleseismic body waves. The rupture area of the 2003 Tokachi-oki earthquake is similar to the western part of the rupture area of the 1952 Tokachi-oki earthquake estimated by Hirata et al. (2003).
Hino, R., Y. Tanioka, T. Kanazawa, S. Sakai, M. Nishino, and K. Suyehiro, Micro-tsunami from a local interplate earthquake detected by cabled offshore tsunami observation in northeastern Japan, Geophys. Res. Lett., 28, 3533–3536, 2001.
Hirata, K., E. L. Geist, K. Satake, Y. Tanioka, and S. Yamaki, Slip distribution of the 1952 Tokachi-oki earthquake (M8.1) along the Kuril Trench deduced from tsunami waveform inversion, J. Geophys. Res., 108(B4), 2196, doi:10.1029/2002JB001976, 2003.
Hirata, K., Y. Tanioka, K. Satake, S. Yamaki, and E. L. Geist, The tsunami source area of the 2003 Tokachi-oki earthquake estimated from tsunami travel times and its relationship to the 1952 Tokachi-oki earthquake, Earth Planets Space, 56, this issue, 367–372, 2004.
Ichiyanagi, M., H. Takahashi, and M. Kasahara, Aftershock activity of the 2003 Tokachi-oki earthquake (MJMA=8.0), Geophysical Bulletin of Hokkaido University, 64, 2004 (in press).
Okada, Y., Surface deformation due to shear and tensile faults in a half-space, Bull. Seismol. Soc. Am., 75, 1135–1154, 1985.
Satake, K., Linear and nonlinear computations for the 1992 Nicaragua earthquake tsunami, Pure Appl. Geophys., 144, 455–470, 1995.
Tanioka, Y. and K. Satake, Coseismic slip distribution of the 1946 Nankai earthquake and aseismic slips caused by the earthquake, Earth Planets Space, 53, 235–241, 2001.
Tanioka, Y. et al., Tsunami run-up heights of the 2003 Tokachi-oki earthquake, Earth Planets Space, 56, this issue, 359–365, 2004.
Tichelaar, B. W. and L. J. Ruff, How good are our best model? Jackknifing, boostrapping, and earthquake depth, EOS, 70, 593, 605–606, 1989.
Yamanaka, K. and M. Kikuchi, Source processes of the Tokachi-oki earthquake on September 26, 2003, inferred from teleseismic body waves, Earth Planets Space, 55, e21–e24, 2003.
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Tanioka, Y., Hirata, K., Hino, R. et al. Slip distribution of the 2003 Tokachi-oki earthquake estimated from tsunami waveform inversion. Earth Planet Sp 56, 373–376 (2004). https://doi.org/10.1186/BF03353067
- The 2003 Tokachi-oki earthquake
- slip distribution
- tsunami waveform inversion