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Responses of earthquakes on July 17, 2006 in the lower ionosphereстатья
- Авторы: Sergeeva N.G., Ogloblina O.F., Vasilyev E.B., Chernyakov S.M.
- Сборник: Physics of Auroral Phenomena. 30th Annual Seminar. Proceedings
- Год издания: 2008
- Место издания: Kola Science Centre RAS Apatity
- Первая страница: 185
- Последняя страница: 188
- Аннотация: A strong earthquake with the magnitude of 7.7 points took place on 17.07.2006 at 08.19.25 UT on the western coast of Indonesia (-9.33º, 107.26º) in very quite conditions in the geomagnetic field (ΣKp = 5). This paper analyses the experimental data, obtained in the Kola Peninsula to identify any response to the earthquake. During the considered days - July 16-18, according to satellite data (GOES11, GOES12) there was observed quite insignificant X-ray emission with the wave length < 0.5-4 Å. There was not observed any absorption of cosmic radio emission according to the data of Ivalo riometer. From the daily amplitude spectra of July 17 there were found oscillations periods of a few hours. Prior to beginning of the earthquake of July 17 the amplitude of ordinary component of the wave decreases abruptly at the altitude of 101 km as well as the electron concentration and the critical frequency of the sporadic layer. The obtained profiles of electron concentration using the method of partial reflections have shown that at the moment of the earthquake the altitude of the maxima of electron concentration increased a few km (3-5 kms) and additional maxima appeared. Oscillations of the signal amplitude with periods of a few hours had been caused by inner gravity waves. Atlassov K.V. (1978) showed, that such periods were typical for inner gravity waves, registered at the altitude of 90 km in Yakutsk.
- Добавил в систему: Черняков Сергей Михайлович