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Equatorial noise emissions with quasiperiodic modulation of wave intensity

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F15%3A00444528" target="_blank" >RIV/68378289:_____/15:00444528 - isvavai.cz</a>

  • Alternative codes found

    RIV/00216208:11320/15:10319440

  • Result on the web

    <a href="http://dx.doi.org/10.1002/2014JA020816" target="_blank" >http://dx.doi.org/10.1002/2014JA020816</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1002/2014JA020816" target="_blank" >10.1002/2014JA020816</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Equatorial noise emissions with quasiperiodic modulation of wave intensity

  • Original language description

    Equatorial noise (EN) emissions are electromagnetic wave events at frequencies between the proton cyclotron frequency and the lower hybrid frequency observed in the equatorial region of the inner magnetosphere. They propagate nearly perpendicular to the ambient magnetic field, and they exhibit a harmonic line structure characteristic of the proton cyclotron frequency in the source region. However, they were generally believed to be continuous in time. We investigate more than 2000 EN events observed by the Spatio-Temporal Analysis of Field Fluctuations and Wide-Band Data Plasma Wave investigation instruments on board the Cluster spacecraft, and we show that this is not always the case. A clear quasiperiodic (QP) time modulation of the wave intensity is present in more than 5% of events. We perform a systematic analysis of these EN events with QP modulation of the wave intensity. Such events occur usually in the noon-to-dawn magnetic local time sector. Their occurrence seems to be related to the increased geomagnetic activity, and it is associated with the time intervals of enhanced solar wind flow speeds. The modulation period of these events is on the order of minutes.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    BL - Plasma physics and discharge through gases

  • OECD FORD branch

Result continuities

  • Project

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

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2015

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    Journal of Geophysical Research: Space Physics

  • ISSN

    2169-9380

  • e-ISSN

  • Volume of the periodical

    120

  • Issue of the periodical within the volume

    4

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    13

  • Pages from-to

    2649-2661

  • UT code for WoS article

    000354894800021

  • EID of the result in the Scopus database

    2-s2.0-84929575792