The December 26, 2004, tsunami on Sumatra Island as a source of internal gravity waves in the earth’s atmosphere
- Авторы: Mikhailova G.A.1, Mikhailov Y.M.1, Kapustina O.V.1
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Учреждения:
- Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation
- Выпуск: Том 56, № 5 (2016)
- Страницы: 634-640
- Раздел: Article
- URL: https://journals.rcsi.science/0016-7932/article/view/155801
- DOI: https://doi.org/10.1134/S0016793216040101
- ID: 155801
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Аннотация
Records of the coastal mareographs during the December 26, 2004, tsunami are used to study the fine structure of the tsunami wave power spectra. It is shown that a series of maxima is observed in their spectra near the source in a range of internal gravity wave frequencies of 0.2–1.2 mHz, which coincides with the frequencies of the natural oscillations of the Earth. This experimental finding enables us to propose a possible physical mechanism for the formation of tsunami waves as a result of oscillations in the sea bottom at these frequencies. Internal gravity waves in the Earth’s atmosphere excited in this way are found in the variations of the total electron content that resulted from this powerful earthquake.
Об авторах
G. Mikhailova
Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation
Email: yumikh@izmiran.ru
Россия, Troitsk, Moscow
Yu. Mikhailov
Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation
Автор, ответственный за переписку.
Email: yumikh@izmiran.ru
Россия, Troitsk, Moscow
O. Kapustina
Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation
Email: yumikh@izmiran.ru
Россия, Troitsk, Moscow
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