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| Titel |
Anomalies of LF signal during seismic activity in November–December 2004 |
| VerfasserIn |
A. A. Rozhnoi, M. S. Solovieva, O. A. Molchanov, M. Hayakawa, S. Maekawa, P. F. Biagi |
| 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 ; 5, no. 5 ; Nr. 5, no. 5 (2005-09-09), S.657-660 |
| Datensatznummer |
250002789
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| Publikation (Nr.) |
 copernicus.org/nhess-5-657-2005.pdf |
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| Zusammenfassung |
| A signal transmitted by Japan Time Standard LF station (40 kHz, Fukushima
prefecture) and recorded in Petropavlovsk-Kamchatski (Russia) is analyzed
during a time interval from 1 July 2004 till 24 January 2005. This interval
is characterized by quiet seismic conditions up to the beginning of
November, but rather strong seismic activity occurs in November and December
not far from Hokkaido (Japan) and in the region of northern Kuril Islands.
There were three series of earthquakes with M=5.6–7.1 in a zone of
sensitivity of our wave path during two months. Nighttime "bay-like" phase
and amplitude anomalies of the LF signal are observed several days before
and during every series of earthquakes. During the whole period of seismic
activity a significant shift in terminator times is also evident. The
spectrum of LF seismo-induced anomalies shows a clear increase for the
period of about 25 min. |
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