Abstract The seismo-ionospheric coupling is a hot topic of modern scientific research. One of the most reasonable mechanisms is the hypothesis of quasistatic electric field. With a preliminary analytical method, electric field in F2-region before Wenchuan earthquake was derived from the five lower latitude ground-based ionosondes: Lhasa (29.63°N, 91.17°E), Chongqing (29.50°N, 106.40°E), Kunming (25.00°N, 102.70°E), Guangzhou (23.15°N, 113.35°E) and Haikou (23.15°N, 110.35°E). The results show that there was an anomalous enhancement of electric field in F2-region close to the epicenter with maximal amplitude ∼2mV/m (about 10 times of the background) at 15:00LT on 9 May, which is in line with the amplitudes of anomalous electric field related to some previous earthquakes observed by satellites.
Anomalous enhancement of electric field derived from ionosonde data before the great Wenchuan earthquake
Advances in Space Research ; 47 , 6 ; 1001-1005
2010-11-04
5 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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