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JETP Letters

, Volume 94, Issue 8, pp 616–620 | Cite as

Japan megathrust earthquake on March 11, 2011: GPS-TEC evidence for ionospheric disturbances

  • V. E. KunitsynEmail author
  • I. A. Nesterov
  • S. L. Shalimov
Plasma, Hydro- and Gas Dynamics

Abstract

Two-dimensional distributions of the vertical total electron content in the ionosphere above the Japan under-sea mega-earthquake on March 11, 2011 are reconstructed using high-temporal-resolution (2-min) data from the Japan GPS network. A diverging ionospheric perturbation with multicomponent spectral composition is identified emerging after the main shock. The disturbances in the ionospheric electron concentration caused by acoustic gravity waves generated by the earthquake-related processes. The initial phase of this disturbance can be used as a marker in the tsunami early warning systems. The surface energy of the earthquake estimated from the amplitude of the ionospheric disturbance is close to the estimate based on the seismic data. Other disturbances (ionospheric responses to the Rayleigh and tsunami waves, a solitary ionospheric pulse) are also analyzed. Physical interpretation of the identified ionospheric disturbances is presented.

Keywords

Total Elec Tron Content JETP Letter Tsunami Wave Ionospheric Disturbance Vertical Total Elec Tron Content 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Pleiades Publishing, Ltd. 2011

Authors and Affiliations

  • V. E. Kunitsyn
    • 1
    • 2
    Email author
  • I. A. Nesterov
    • 1
  • S. L. Shalimov
    • 2
  1. 1.Faculty of PhysicsMoscow State UniversityMoscowRussia
  2. 2.Schmidt Institute of Physics of the EarthRussian Academy of SciencesMoscowRussia

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