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| Titel |
Fractal analysis of subionospheric LF propagation data and consideration of the lithosphere-atmosphere-ionosphere coupling |
| VerfasserIn |
T. Imamura, Y. Ida, Y. Kasahara, T. Nakamura, Y. Hobara, M. Hayakawa |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 10, no. 4 ; Nr. 10, no. 4 (2010-04-23), S.901-906 |
| Datensatznummer |
250008093
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| Publikation (Nr.) |
 copernicus.org/nhess-10-901-2010.pdf |
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| Zusammenfassung |
| Fractal analysis has been applied to the local nighttime data of
subionospheric LF propagation, and the fractal dimension is estimated every
day in the two distinct frequency ranges (AW: acoustic wave and AGW:
atmospheric gravity wave). The data during several years are analyzed for the
propagation paths from the Japanese transmitter of JJY to Moshiri (Hokkaido)
and to Kochi. As the result of analysis, we come to the conclusion that when
we pay attention to the period just around the earthquake, we sometimes
detect some significant increases in the fractal dimension either in AW or
AGW range. This indicates that the self – organization effect prior to an
earthquake in the lithosphere, might be seen even in the lower ionosphere,
probably in terms of atmospheric oscillation effect. |
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