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| Titel |
A pre seismic radio anomaly revealed in the area where the Abruzzo earthquake (M=6.3) occurred on 6 April 2009 |
| VerfasserIn |
P. F. Biagi, L. Castellana, T. Maggipinto, D. Loiacono, L. Schiavulli, T. Ligonzo, M. Fiore, E. Suciu, A. Ermini |
| 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 ; 9, no. 5 ; Nr. 9, no. 5 (2009-09-08), S.1551-1556 |
| Datensatznummer |
250006977
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| Publikation (Nr.) |
 copernicus.org/nhess-9-1551-2009.pdf |
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| Zusammenfassung |
| On 6 April 2009 a strong (Mw=6.3) earthquake occurred in the Abruzzo
region (central Italy). Since 1996, the intensity of CLT (f=189 kHz,
Sicily, Italy), MCO (f=216 kHz, France) and CZE (f=270 kHz, Czech
Republic) broadcast signals has been collected with a ten minutes sampling
rate by a receiver operating in a place located about 13 km far from the
epicenter. During March 2009, the old receiver was substituted with a new one
able to measure, with one minute sampling rate, the intensity of five VLF
signals and five LF signals radiated by transmitters located in different
zones of Europe. The MCO and CZE transmitters mentioned above are included
among them. From 31 March to 1 April the intensity of the MCO radio signal
dropped and this drop was observed only in this signal. The possibility that
the drop was connected to problems in the transmitter or in the receiver was
investigated and excluded. So, the drop indicates a defocusing of the
radiated signal. Since no particular meteorological situation along the path
transmitter-receiver happened, the defocusing must be related to other
causes, and a possibility is presented that it is a precursor of the Abruzzo
earthquake. |
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