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- W2904195386 endingPage "520" @default.
- W2904195386 startingPage "504" @default.
- W2904195386 abstract "Abstract We report preseismic and postseismic distinct features observed in equatorial ionospheric F region in Indian longitude during two major earthquakes that occurred on 28 March 2005 ( M w =8.6) and 26 December 2004 ( M w =9.1) with epicenters near Sumatra, Indonesia. We used spaced receiver scintillation observations on a 251‐MHz signal transmitted from a geostationary satellite and recorded at dip equatorial station Tirunelveli, which is ≈2,200 km away from the epicenter of these earthquakes. On 28 March 2005, we noticed significant enhancement (≈88.5 m/s) in F region zonal plasma drift as compared to their seasonal quiet time drifts, 20 min prior to the start of earthquake. This implies the presence of additional vertically downward electric field of approximately 3 mV/m, which is linked with the earthquake mechanism. It is unusual because so far we have not encountered such feature on either magnetically quiet or disturbed days. Spatial scales associated with equatorial spread F irregularities generated in the postsunset hours on this earthquake day are considerably smaller. It suggests that the earthquake‐linked electric field influenced the structuring and evolution of equatorial spread F irregularities on this earthquake day. Another earthquake that occurred on 26 December 2004 triggered a tsunami. We noticed that the earthquake‐ and tsunami‐linked effects in the F region plasma drifts are distinctly observed even 18.5 hr after the earthquake." @default.
- W2904195386 created "2018-12-22" @default.
- W2904195386 creator A5020944437 @default.
- W2904195386 creator A5036669995 @default.
- W2904195386 creator A5057609090 @default.
- W2904195386 creator A5085814458 @default.
- W2904195386 date "2019-01-01" @default.
- W2904195386 modified "2023-09-24" @default.
- W2904195386 title "Earthquake/Tsunami‐Linked Imprints in the Equatorial <i>F</i> Region Zonal Plasma Drifts and Spatial Structures of Plasma Bubbles" @default.
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- W2904195386 doi "https://doi.org/10.1029/2018ja025798" @default.
- W2904195386 hasPublicationYear "2019" @default.