1. Formation mechanism of great positive TEC disturbances prior to Wenchuan earthquake on May 12, 2008
- Author
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Klimenko, M.V., Klimenko, V.V., Zakharenkova, I.E., Pulinets, S.A., Zhao, B., and Tsidilina, M.N.
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WENCHUAN Earthquake, China, 2008 , *ELECTRONS , *GRAVITY waves , *ELECTRIC fields , *NUMERICAL analysis , *SEISMOLOGY , *IONOSPHERE - Abstract
Abstract: The problems of physical explanation and possible mechanisms of the seismo-ionospheric effects formation are under discussion now. There are proposed different mechanisms of such effects, for example, large- and small-scale internal gravity waves (IGWs), atmospheric electric field, electromagnetic fields and emissions. However, the appearance of local large-scale seismo-ionospheric anomalies in Total Electron Content (TEC) is possible to explain only by two mechanisms: an atmospheric electric field and/or small-scale IGWs. In this paper, the simulation results for reproduction of the observed seismo-ionospheric great positive effects in TEC prior to strong Wenchuan earthquake are presented. The obtained results confirm the proposed mechanism of seismo-ionospheric effects formation by the penetration of the seismogenic electric field from the atmosphere into the ionosphere. It is suggested that so great TEC enhancement observed 3days prior to Wenchuan earthquake could be explained by combined action of seismogenic vertical electric field and IGWs generated by the solar terminator. [Copyright &y& Elsevier]
- Published
- 2011
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