Attenuation of electromagnetic waves at the frequency 1.7 kHz in the upper ionosphere observed by the DEMETER satellite in the vicinity of earthquakes

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F12%3A00376939" target="_blank" >RIV/68378289:_____/12:00376939 - isvavai.cz</a>

Result on the web

<a href="http://www.annalsofgeophysics.eu/index.php/annals/article/view/5276" target="_blank" >http://www.annalsofgeophysics.eu/index.php/annals/article/view/5276</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4401/ag-5276" target="_blank" >10.4401/ag-5276</a>

Result language

angličtina

Original language name

Attenuation of electromagnetic waves at the frequency 1.7 kHz in the upper ionosphere observed by the DEMETER satellite in the vicinity of earthquakes

Original language description

The DEMETER satellite was the first satellite specifically dedicated to the recording of electromagnetic phenomena connected with seismic activity. Almost 6.5 years of measurements provide good opportunities to analyze a unique dataset with global Earthcoverage. We present the results of a statistical study of the intensity of very low frequency electromagnetic waves recorded in the upper ionosphere. For this study a robust two-step data processing has been used. We confirm the previously reported results of a very small, but statistically significant, decrease in VLF wave intensities a few hours before times of main shocks using this much larger dataset. The wave intensity decrease at a frequency of about 1.7 kHz is observed only during the night andonly for earthquakes with lower depth. This can be explained by increases in the cut-off frequency of the Earth ionosphere waveguide caused by imminent earthquakes.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BL - Plasma physics and discharge through gases

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2012

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Annals of Geophysics

ISSN

1593-5213

e-ISSN

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Volume of the periodical

55

Issue of the periodical within the volume

1

Country of publishing house

IT - ITALY

Number of pages

7

Pages from-to

157-163

UT code for WoS article

000306480400019

EID of the result in the Scopus database

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