On the near-bottom pressure variations in the region of the 2003 Tokachi-Oki tsunami source |
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| Authors: | M. A. Nosov S. V. Kolesov A. V. Denisova A. B. Alekseev B. V. Levin |
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| Affiliation: | (1) Faculty of Physics, Moscow State University, Moscow, Russia;(2) Institute of Marine Geology and Geophysics, Far Eastern Branch, Russian Academy of Sciences, Yuzhno-Sakhalinsk, Russia |
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| Abstract: | The Tokachi-Oki earthquake was the strongest seismic event in 2003. The tsunami caused by the earthquake reached a height of four meters at the northeastern coast of Hokkaido. The JAMSTEC successfully recorded the variations of the near-bottom pressure in the region of the tsunami source. An analysis of the data reveals low-frequency (～ 0.15 Hz) elastic vibrations of the water layer. Estimates of the amplitude, velocity, and duration of the bottom deformation at the tsunami source were obtained. |
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