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| Titel |
Ionospheric effects of earthquakes in Japan in March 2011 obtained from observations of lightning electromagnetic radio signals |
| VerfasserIn |
V. A. Mullayarov, V. V. Argunov, L. M. Abzaletdinova, V. I. Kozlov |
| 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 ; 12, no. 10 ; Nr. 12, no. 10 (2012-10-23), S.3181-3190 |
| Datensatznummer |
250011154
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| Publikation (Nr.) |
 copernicus.org/nhess-12-3181-2012.pdf |
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| Zusammenfassung |
Manifestations of disturbances in the lower ionosphere caused by a complex
series of earthquakes (the strong earthquakes with M = 7.3 and M = 9 – known as M9
Tohoku EQ – and the subsequent aftershocks) that occurred near
the Japanese island of Honshu have been considered with the use of
monitoring measurements of the amplitude of lightning electromagnetic
signals (atmospherics) received at Yakutsk. Some data of one-point lightning
location systems have been compared with the data of the WWLLN network.
The analysis of hourly values variation of the atmospheric amplitude
passing over the earthquake epicenters shows that during the initial
period (the strong earthquakes on 9 March and 11 March) a typical pattern of
variations was observed. It was manifested in the increased amplitude after
both earthquakes. There were also possible precursors in the form of the
increase in amplitude 12–14 days before the events. Though the focuses of
these earthquakes were very close to each other, the registration of both
precursors may indicate that both of the lithospheric processes developed to
a certain extent independently.
During all the days of the atmospheric amplitude enhancement the
quasi-periodic variation trains were recorded. Together with the delay of
earthquake effects relative to the time of the events, they may testify in
favor of transferring the energy of lithospheric processes into the lower
ionosphere by means of atmospheric gravity waves. |
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