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AGU: Journal of Geophysical Research, Space Physics

 

Keywords

  • GPS TEC
  • iononamis
  • tsunamis

Index Terms

  • Ionosphere: Ionospheric disturbances
  • Oceanography: Physical: Tsunamis and storm surges
  • Seismology: Earthquake source observations
  • Radio Science: Ionospheric physics
  • Radio Science: Ionospheric propagation
Abstract
Cited By (17)
 

Abstract

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 111, A05303, 4 PP., 2006
doi:10.1029/2005JA011200

Ionospheric GPS total electron content (TEC) disturbances triggered by the 26 December 2004 Indian Ocean tsunami

Jann-Yenq Liu

Institute of Space Science, National Central University, Chung-Li, Taiwan

Yi-Ben Tsai

Institute of Geophysics, National Central University, Chung-Li, Taiwan

Kuo-Fong Ma

Institute of Geophysics, National Central University, Chung-Li, Taiwan

Yuh-Ing Chen

Institute of Statistics, National Central University, Chung-Li, Taiwan

Ho-Fang Tsai

Central Weather Bureau, Taipei, Taiwan

Chien-Hung Lin

Institute of Space Science, National Central University, Chung-Li, Taiwan

Masashi Kamogawa

Department of Physics, Tokyo Gakugei University, Tokyo, Japan

Chien-Ping Lee

Institute of Geophysics, National Central University, Chung-Li, Taiwan

Tsunami ionospheric disturbances (TIDs) of the 26 December 2004 M w 9.3 Sumatra earthquake are detected by the total electron content (TEC) of ground-based receivers of the global positioning system (GPS) in the Indian Ocean area. It is found that the tsunami waves triggered atmospheric disturbances near the sea surface, which then traveled upward with an average velocity of about 730 m/s (2700 km/hr) into the ionosphere and significantly disturbed the electron density within it. Results further show that the TIDs, which have maximum height of about 8.6–17.2 km, periods of 10–20 min, and horizontal wavelengths of 120–240 km, travel away from the epicenter with an average horizontal speed of about 700 km/hr (190 m/s) in the ionosphere.

Received 20 April 2005; accepted 17 January 2006; published 9 May 2006.

Citation: Liu, J.-Y., Y.-B. Tsai, K.-F. Ma, Y.-I. Chen, H.-F. Tsai, C.-H. Lin, M. Kamogawa, and C.-P. Lee (2006), Ionospheric GPS total electron content (TEC) disturbances triggered by the 26 December 2004 Indian Ocean tsunami, J. Geophys. Res., 111, A05303, doi:10.1029/2005JA011200.

Cited By

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