Verification of the concept of seismoionospheric coupling under quiet heliogeomagnetic conditions, using the Wenchuan (China) earthquake of May 12, 2008, as an example
- 66 Downloads
The variability of the ionosphere during April–May, 2008, has been analyzed in detail in order to reveal anomalous variations related to seismic activity, initiated by the strongest Wenchuan earthquake (M = 7.9) in the Sichuan province on May 12, 2008. Information about the total electron content (TEC) from the network of GPS receivers in the earthquake region, the global IONEX TEC maps, and the reconstructed vertical profiles of electron density according to the data of GPS receivers were used as a data source. The spatial and time localization of the observed anomalies, their morphological features, and the absence of geomagnetic disturbances during the observation period undoubtedly demonstrate that the observed variations were caused by seismic activity.
KeywordsTotal Electron Content Main Shock Longmenshan Fault Geomagnetic Equator Total Electron Content Variation
Unable to display preview. Download preview PDF.
- E. L. Afraimovich and E. I. Astafyeva, “TEC Anomalies — Local TEC Changes Prior to Earthquakes or TEC Response to Solar and Geomagnetic Activity Changes?,” Earth Planet. Space 60, 961–966 (2008).Google Scholar
- V. G. Bondur and V. M. Smirnov, “A Method of Earthquake Forecast Based on the Lineament Analysis of Satellite Images,” Dokl. Akad. Nauk 402(5), 675–679 (2005) [Dokl. Earth Sci. 402 (4), 561–568 (2005)].Google Scholar
- I. P. Dobrovl’skii, Theory of Tectonic Earthquake Preparation (Inst. Fiz. Zemli Akad. Nauk SSSR., Moscow, 1991) [in Russian].Google Scholar
- M. Hernández-Pajares, http://maite152.upc.es/~ionex3/doc/IPS_IONO_report_April2003_7.pdf.
- J. Y. Liu, Y. J. Chuo, S. J. Shan, et al., “Pre-Earthquake Ionospheric Anomalies Registered by Continuous GPS TEC Measurements,” Ann. Geophys. 22, 1585–1593 (2004).Google Scholar
- S. A. Pulinets and A. D. Legen’ka, “Dynamics of the Near-Equatorial Ionosphere Prior to Strong Earthquakes,” Geomagn. Aeron. 42(2) (2002) [Geomagn. Aeron. 42, 227–232 (2002)].Google Scholar
- S. A. Pulinets and A. D. Legen’ka, “Spatial-Time Characteristics of Large-Scale Electron Density Inhomogeneities, Observed in the Ionospheric F Region before Strong Earthquakes,” Kosm. Issled. 41(3), 221–229 (2003).Google Scholar
- S. A. Pulinets and K. A. Boyarchuk, Ionospheric Precursors of Earthquakes (Springer, Berlin, 2004).Google Scholar
- S. A. Pulinets, “Lithosphere-Atmosphere-Ionosphere Coupling (LAIC) Model,” in Electromagnetic Phenomena Associated with Earthquakes, Research Signpost, Japan, Chapter 9, 235–253 (2009a).Google Scholar
- S. A. Pulinets, A. D. Legen’ka, and T. I. Zelenova, “Local-Time Dependence of Seismo-Ionospheric Variations at the F-Layer Maximum,” Geomagn. Aeron. 38(3), 188–193 (1998b) [Geomagn. Aeron. 38, 400–402 (1998b)].Google Scholar
- S. A. Pulinets, K. A. Boyarchuk, A. M. Lomonosov, et al., “Ionospheric Precursors to Earthquakes: A Preliminary Analysis of the foF2 Critical Frequencies at Chung-Li Ground-Based Station for Vertical Sounding of the Ionosphere (Taiwan),” Geomagn. Aeron. 42(4), (2002) [Geomagn. Aeron. 42, 508–513 (2002)].Google Scholar
- S. A. Pulinets, P. Biagi, V. Tramutoli, A. D. Legen’ka, and V. Kh. Depuev, “Irpinia Earthquake 23 November 1980 — Lesson from Nature Revealed by Joint Data Analysis,” Annals of Geophysics 50, 61–78 (2007).Google Scholar