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Subionospheric LF monitoring of ionospheric perturbations prior to the Tokachi-oki earthquake and a possible mechanism of lithosphere-ionosphere coupling
https://doi.org/10.15094/00006400
https://doi.org/10.15094/00006400faf41c4c-e0bf-46ad-8078-4bbd0ba9be73
名前 / ファイル | ライセンス | アクション |
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KJ00003387652 (1.4 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 2005-08-01 | |||||
タイトル | ||||||
タイトル | Subionospheric LF monitoring of ionospheric perturbations prior to the Tokachi-oki earthquake and a possible mechanism of lithosphere-ionosphere coupling | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | subionospheric LF propagation | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | earthquakes | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | ionospheric perturbations | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.15094/00006400 | |||||
ID登録タイプ | JaLC | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
著者名(英) |
Hayakawa, Masashi
× Hayakawa, Masashi× Shvets, Alexandre V.× Maekawa, Shinko |
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著者所属(英) | ||||||
en | ||||||
The University of Electro-Communications | ||||||
著者所属(英) | ||||||
en | ||||||
Usikov Institute for Radiophysics and Electronics | ||||||
著者所属(英) | ||||||
en | ||||||
The University of Electro-Communications | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | We first present the results of simultaneous monitoring of subionospheric LF propagation over two different paths prior to a very strong Tokachi-oki earthquake (near the east coast of Hokkaido Island on September 25, 2003) with magnitude 8.3. Nighttime amplitude fluctuations of the Japanese Time Standard Transmitter (JJY, 40 kHz) signal received at Moshiri (Japan, geographic coordinates 44°N, 142°E) and at Petropavlovsk-Kamchatski, Russia (53°N, 158°E) were analyzed. As a possible precursory signature we observed synchronous intensification of quasi-periodic 16-day variations of the dispersion in the signals received at both observation stations before the earthquake. The strongest deviations observed as a rule were depletions of signal amplitude probably connected with an increase in loss in the ionosphere by the enhancement of turbulence. This is due to dissipation of internal gravity waves (IGW) at the lower ionospheric heights. A scenario of interconnection between seismo-activity, atmospheric gravity waves and planetary waves, is proposed to explain the observed association with strong earthquakes. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA11397422 | |||||
書誌情報 |
Advances in polar upper atmosphere research 巻 19, p. 42-54, 発行日 2005-08 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |