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The vertical propagation of disturbances triggered by seismic waves of the 11 March 2011 M9.0 Tohoku earthquake over Taiwan
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SYSNO ASEP 0458523 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The vertical propagation of disturbances triggered by seismic waves of the 11 March 2011 M9.0 Tohoku earthquake over Taiwan Author(s) Liu, J. Y. (TW)
Chen, C. H. (TW)
Sun, Y. Y. (TW)
Chen, C. (TW)
Tsai, H. F. (TW)
Yen, H. Y. (TW)
Chum, Jaroslav (UFA-U) RID, ORCID
Laštovička, Jan (UFA-U) RID, ORCID
Yang, Q. S. (TW)
Chen, W. S. (CN)
Wen, S. (TW)Number of authors 11 Source Title Geophysical Research Letters. - : Wiley - ISSN 0094-8276
Roč. 43, č. 4 (2016), s. 1759-1765Number of pages 7 s. Language eng - English Country US - United States Keywords ionospheric disturbances ; Pacific Coast ; surface-waves ; Tohoku-oki earthquake ; ionograms Subject RIV DG - Athmosphere Sciences, Meteorology R&D Projects GC15-07281J GA ČR - Czech Science Foundation (CSF) Institutional support UFA-U - RVO:68378289 UT WOS 000373109000045 EID SCOPUS 84977856310 DOI 10.1002/2015GL067487 Annotation In this paper, concurrent/colocated measurements of seismometers, infrasonic systems, magnetometers, HF-CW (high frequency-continuous wave) Doppler sounding systems, and GPS receivers are employed to detect disturbances triggered by seismic waves of the 11 March 2011M9.0 Tohoku earthquake. No time delay between colocated infrasonic (i.e., super long acoustic) waves and seismic waves indicates that the triggered acoustic and/or gravity waves in the atmosphere (or seismo-traveling atmospheric disturbances, STADs) near the Earth's surface can be immediately activated by vertical ground motions. The circle method is used to find the origin and compute the observed horizontal traveling speed of the triggered infrasonic waves. The speed of about 3.3km/s computed from the arrival time versus the epicentral distance suggests that the infrasonic waves (i.e., STADs) are mainly induced by the Rayleigh waves. The agreements in the travel time at various heights between the observation and theoretical calculation suggest that the STADs triggered by the vertical motion of ground surface caused by the Tohoku earthquake traveled vertically from the ground to the ionosphere with speed of the sound in the atmosphere over Taiwan. Workplace Institute of Atmospheric Physics Contact Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019 Year of Publishing 2017
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