Additional attenuation of natural VLF electromagnetic waves observed by the DEMETER spacecraft resulting from preseismic activity

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F13%3A10191777" target="_blank" >RIV/00216208:11320/13:10191777 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378289:_____/13:00395581

Výsledek na webu

<a href="http://dx.doi.org/10.1002/jgra.50469" target="_blank" >http://dx.doi.org/10.1002/jgra.50469</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/jgra.50469" target="_blank" >10.1002/jgra.50469</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Additional attenuation of natural VLF electromagnetic waves observed by the DEMETER spacecraft resulting from preseismic activity

Popis výsledku v původním jazyce

We use VLF electromagnetic wave data measured by the DEMETER (Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions) satellite at an altitude of about 700km to check for the presence of statistically significant changes of natural wave intensity (due to signals from lightning) related to preseismic activity. All the relevant data acquired by DEMETER during almost 6.5years of the mission have been analyzed using a robust two-step data-processing schema. This enables us to compare data from the vicinity of about 8400 earthquakes with an unperturbed background distribution based on data collected during the whole DEMETER mission and to evaluate the statistical significance of the observed effects. We confirm previously reported results of a small but statistically significant decrease of the wave intensity (by approximate to 2dB) at frequencies of about 1.7kHz. The effect is observed for a few hours before the times of the main shocks; it occurs during the night. The

Název v anglickém jazyce

Additional attenuation of natural VLF electromagnetic waves observed by the DEMETER spacecraft resulting from preseismic activity

Popis výsledku anglicky

We use VLF electromagnetic wave data measured by the DEMETER (Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions) satellite at an altitude of about 700km to check for the presence of statistically significant changes of natural wave intensity (due to signals from lightning) related to preseismic activity. All the relevant data acquired by DEMETER during almost 6.5years of the mission have been analyzed using a robust two-step data-processing schema. This enables us to compare data from the vicinity of about 8400 earthquakes with an unperturbed background distribution based on data collected during the whole DEMETER mission and to evaluate the statistical significance of the observed effects. We confirm previously reported results of a small but statistically significant decrease of the wave intensity (by approximate to 2dB) at frequencies of about 1.7kHz. The effect is observed for a few hours before the times of the main shocks; it occurs during the night. The

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BL - Fyzika plasmatu a výboje v plynech

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

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

Název periodika

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS

ISSN

2169-9380

e-ISSN

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Svazek periodika

118

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

5286-5295

Kód UT WoS článku

000324992300051

EID výsledku v databázi Scopus

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