Possible Seismic Influence on VLF Wave Intensity: Observations by a Low-Altitude Satellite

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F08%3A00326597" target="_blank" >RIV/68378289:_____/08:00326597 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Possible Seismic Influence on VLF Wave Intensity: Observations by a Low-Altitude Satellite
Original language description
We present results of a statistical study of VLF (up to 10 kHz) wave intensity measured by a low-altitude spacecraft in the vicinity of earthquakes. The data from the French DEMETER spacecraft (altitude about 700 km, nearly Sun-synchronous orbit) that was specially developed for such kind of studies are used. The recently developed two-step data processing method is briefly introduced and the main obtained results are reviewed. Finally, a simple independent test of the obtained results is done in orderto give an additional evidence for the existence of possible seismic-related effect. Our results indicate that there is a decrease of power spectral density of electric field fluctuations shortly (0-4 hours) before the time of the main shock. This decrease was observed close to surface earthquakes (depth less than 40 km) with magnitude larger than or equal to 4.8 and only during the night. No similar effect was observed for deep earthquakes nor during the day.
Czech name
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Czech description
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Project
<a href="/en/project/GA205%2F06%2F1267" target="_blank" >GA205/06/1267: Low-frequency wave coupling of the atmosphere, ionosphere, and inner magnetosphere of the Earth</a><br>
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2008
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
WDS'08 Proceedings of Contributed Papers: Part II - Physics of Plasmas and Ionized Media
ISBN
978-80-7378-066-1
ISSN
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e-ISSN
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Number of pages
4
Pages from-to
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Publisher name
MATFYZPRESS, Praha
Place of publication
Praha
Event location
Prague
Event date
Jun 3, 2008
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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