Formation mechanism of great positive TEC disturbances prior to Wenchuan earthquake on May 12, 2008

被引:85
作者
Klimenko, M. V. [1 ,2 ]
Klimenko, V. V. [2 ]
Zakharenkova, I. E. [2 ]
Pulinets, S. A. [3 ,4 ]
Zhao, B. [5 ]
Tsidilina, M. N. [6 ]
机构
[1] Kaliningrad State Tech Univ, Kaliningrad 236000, Russia
[2] NV Pushkov IZMIRAN RAS, West Dept, Kaliningrad 236010, Russia
[3] Fedorov Inst Appl Geophys, Moscow 129226, Russia
[4] Space Res Inst IKI, Moscow 117997, Russia
[5] Chinese Acad Sci, Beijing Natl Observ Space Environm, Inst Geol & Geophys, Beijing 100029, Peoples R China
[6] AEROCOSMOS Sci Ctr Aerosp Monitoring, Moscow 105064, Russia
关键词
Earthquake; Seismo-ionospheric effects; Electric field; Internal gravity waves; Numerical modeling; TOTAL ELECTRON-CONTENT; IONOSPHERIC ANOMALIES; PHYSICAL-MECHANISM; ATMOSPHERE; MODEL; WAVES; PRECURSORS; FIELD; PERTURBATIONS; LITHOSPHERE;
D O I
10.1016/j.asr.2011.03.040
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
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 3 days prior to Wenchuan earthquake could be explained by combined action of seismogenic vertical electric field and IGWs generated by the solar terminator. (C) 2011 COSPAR. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:488 / 499
页数:12
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