Elastic oscillations of water column in the 2003 Tokachi-oki tsunami source: in-situ measurements and 3-D numerical modelling
作者： M. A. Nosov , S. V. Kolesov
关键词: Crust 、 Compressible flow 、 Water column 、 Compressibility 、 Seismology 、 Amplitude 、 Geophysics 、 Elasticity (economics) 、 Physics 、 Spectral line 、 Observatory
摘要: Abstract. During the 2003 Tokachi-Oki tsunamigenic earthquake real-time JAMSTEC observatory obtained records which provided a unique opportunity to have look deep inside tsunami source. Considering water column as compressible medium we processed bottom pressure in order estimate amplitude, duration and velocity of displacement. Spectral analysis revealed clear manifestation low-frequency elastic oscillations column. We also presented 3-D finite-difference numerical model developed framework linear potential theory ideal fluid better understand dynamical processes The reproduces position main spectral maximum rather correctly. However, due neglecting crust elasticity lack exact knowledge spatiotemporal laws motion, there is an essential difference between in-situ observed computed spectra.
harvard.edu
nat-hazards-earth-syst-sci.net参考文章(19)
Kinjiro Kajiura, 45. Tsunami Source, Energy and the Directivity of Wave Radiation 東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo. ,vol. 48, pp. 835- 869 ,(1970)
H. MIYOSHI, Generation of the Tsunami in Compressible Water (Part I) Journal of the Oceanographical Society of Japan. ,vol. 10, pp. 1- 9 ,(1954) , 10.5928/KAIYOU1942.10.1
Yuichiro Tanioka, Kenji Hirata, Ryota Hino, Toshihiko Kanazawa, Slip distribution of the 2003 Tokachi-oki earthquake estimated from tsunami waveform inversion Earth, Planets and Space. ,vol. 56, pp. 373- 376 ,(2004) , 10.1186/BF03353067
Yuji Yagi, Source rupture process of the 2003 Tokachi-oki earthquake determined by joint inversion of teleseismic body wave and strong ground motion data Earth, Planets and Space. ,vol. 56, pp. 311- 316 ,(2004) , 10.1186/BF03353057
T. Ohmachi, Simulation of Tsunami Induced by Dynamic Displacement of Seabed due to Seismic Faulting Bulletin of the Seismological Society of America. ,vol. 91, pp. 1898- 1909 ,(2001) , 10.1785/0120000074
S. Miyazaki, P. Segall, J. Fukuda, T. Kato, Space time distribution of afterslip following the 2003 Tokachi-oki earthquake: Implications for variations in fault zone frictional properties Geophysical Research Letters. ,vol. 31, pp. n/a- n/a ,(2004) , 10.1029/2003GL019410
Kenji Hirata, Yuichiro Tanioka, Kenji Satake, Shigeru Yamaki, Eric L Geist, None, 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 and Space. ,vol. 56, pp. 367- 372 ,(2004) , 10.1186/BF03353066
K. Hirata, M. Aoyagi, H. Mikada, K. Kawaguchi, Y. Kaiho, R. Iwase, S. Morita, I. Fujisawa, H. Sugioka, K. Mitsuzawa, K. Suyehiro, H. Kinoshita, N. Fujiwara, Real-time geophysical measurements on the deep seafloor using submarine cable in the southern Kurile subduction zone IEEE Journal of Oceanic Engineering. ,vol. 27, pp. 170- 181 ,(2002) , 10.1109/JOE.2002.1002471
Yoshiko Yamanaka, Masayuki Kikuchi, Source process of the recurrent Tokachi-oki earthquake on September 26, 2003, inferred from teleseismic body waves Earth, Planets and Space. ,vol. 55, pp. e21- e24 ,(2003) , 10.1186/BF03352479
Hitoshi Mikada, Kyohiko Mitsuzawa, Hiroyuki Matsumoto, Tomoki Watanabe, Shigehiko Morita, Riyo Otsuka, Hiroko Sugioka, Toshitaka Baba, Eiichiro Araki, Kiyoshi Suyehiro, New discoveries in dynamics of an M8 earthquake-phenomena and their implications from the 2003 Tokachi-oki earthquake using a long term monitoring cabled observatory Tectonophysics. ,vol. 426, pp. 95- 105 ,(2006) , 10.1016/J.TECTO.2006.02.021