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Vol. 13 (2010 year), No. 4

Zolotov O.V., Prokhorov B.E.
Morphological features of the total electron content variations before the Whenchuan earthquake, 2008

The paper presents the investigation and description of the main morphological features of the total electron content (TEC) variations before the Whenchuan earthquake of May 12, 2008, M 7.9, D 19 km, (31.0N;103.4E). The observed TEC disturbances were strongly linked to the near-epicenter and have been treated by the authors as manifestation of the "lithosphere–atmosphere–ionosphere" coupling processes.

(in Russian, стр.4, fig. 2, tables. 0, ref 12, Adobe PDF, Adobe PDF 0 Kb)

Vol. 15 (2012 year), No. 3

Zolotov O.V., Namgaladze A.A., Prokhorov B.E.
Total electron content disturbances prior to Great Tohoku March 11, 2011 and October 23, 2011 Turkey Van earthquakes and their physical interpretation

This paper discusses the GPS (Global Positioning System) observed TEC (Total Electron Content) variations prior to the M 9.0 Great Tohoku (Japan, Sendai) March 11, 2011 and M 7.1 Oct. 23, 2011 Turkey Van earthquakes as possible seismo-ionosphere precursors. We have formulated a set of the TEC phenomenological features often reported as precursors to strong earthquakes based on our experience and publications' analysis. This feature-set has been applied to the relative TEC deviations for time intervals March 08-11, 2011 and Oct. 20-23, 2011 preceding M 9.0 Great Tohoku (Japan) March 11 and Turkey Van Oct. 23 earthquakes, respectively. In both cases there have been revealed strong local long-living (of about several hours) TEC disturbances at the near-epicenter and magnetically conjugated areas. These disturbances may be treated as seismo-ionospheric precursors. The physical mechanism for the observed TEC structures for these two as well as for other cases of recent strong seismic events has been proposed. The anomalies have been interpreted and explained on the base of this physical mechanism from the origin hypothesis point of view in terms of electromagnetic lithosphere-ionosphere coupling.

(in English, стр.12, fig. 3, tables. 0, ref 63, Adobe PDF, Adobe PDF 0 Kb)