Penetration of the electric fields of the geomagnetic sudden commencement over the globe as observed with the HF Doppler sounders and magnetometers

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F21%3A00537218" target="_blank" >RIV/68378289:_____/21:00537218 - isvavai.cz</a>

Result on the web

<a href="https://earth-planets-space.springeropen.com/articles/10.1186/s40623-020-01350-8" target="_blank" >https://earth-planets-space.springeropen.com/articles/10.1186/s40623-020-01350-8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1186/s40623-020-01350-8" target="_blank" >10.1186/s40623-020-01350-8</a>

Result language

angličtina

Original language name

Penetration of the electric fields of the geomagnetic sudden commencement over the globe as observed with the HF Doppler sounders and magnetometers

Original language description

Using the HF Doppler sounders at middle and low latitudes (Prague, Czech Republic: Tucuman, Argentina: Zhongli, Republic of China, and Sugadaira, Japan), we observed the electric fields of the geomagnetic sudden commencement (SC) propagating near-instantaneously (within 10 s) over the globe. We found that the electric fields of the preliminary impulse (PI) and main impulse (MI) of the SC are in opposite direction to each other and that the PI and MI electric fields are directed from the dusk to dawn and dawn to dusk, respectively, manifesting the nature of the curl-free potential electric field. We further found that the onset and peak of the PI electric field are simultaneous on the day and nightsides (0545, 1250, 1345 MLT) within the resolution of 10 s. With the magnetometer data, we confirmed the near-instantaneous development of the ionospheric currents from high latitudes to the equator and estimated the location of the field-aligned currents that supply the ionospheric currents. The global simultaneity of the electric and magnetic fields does not require the contribution of the magnetohydrodynamic waves in the magnetosphere nor in the F-region ionosphere. The global simultaneity and day–night asymmetry of the electric fields are explained with the ionospheric electric potentials transmitted at the speed of light by the TM0 mode waves in the Earth-ionosphere waveguide.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10305 - Fluids and plasma physics (including surface physics)

Project

<a href="/en/project/GA18-01969S" target="_blank" >GA18-01969S: Atmospheric waves: dynamics and vertical coupling</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

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

Name of the periodical

Earth, Planets and Space

ISSN

1880-5981

e-ISSN

1880-5981

Volume of the periodical

73

Issue of the periodical within the volume

1

Country of publishing house

DE - GERMANY

Number of pages

13

Pages from-to

10

UT code for WoS article

000610099300002

EID of the result in the Scopus database

2-s2.0-85098762990