English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Geomagnetic storm-time variations often occur\udcoherently at high latitude and the day-side dip equator where they affect the\udnormal eastward Sq field. This paper presents an analysis of ground magnetic\udfield and ionospheric electrodynamic data related to the geomagnetic storm which\udoccured on 27 May 1993 during the International Equatorial Electrojet Year\ud(IEEY) experiment. This storm-signature analysis on the auroral, mid-latitude\udand equatorial ground field and ionospheric electrodynamic data leads to the\udidentification of a sensitive response of the equatorial electrojet (EEJ) to\udlarge-scale auroral return current: this response consists in a change of the\udeastward electric field during the pre-sunrise hours (0400-0600 UT) coherently\udto the high-, mid-, and equatorial-latitude H decrease and the\uddisappearance of the EEJ irregularities between the time-interval 0800-0950 UT.\udSubsequent to the change in h'F during pre-sunrise hours, the observed foF2\udincrease revealed an enhancement of the equatorial ionization anomaly (EIA)\udcaused by the high-latitude penetrating electric field. The strengthening of\udthese irregularities attested by the Doppler frequency increase tracks the H\udcomponent at the equator which undergoes a rapid increase around 0800 UT. The\ud&#x2206;H variations observed at the equator are the sum of the\udfollowing components: SR, DP, DR, DCF and\ud\udDT. Keywords. Equatorial electrojet ·\udMagnetosphere-ionosphere interactions · Electric fields and currents · Auroral\udionosphere · Ionospheric disturbance

Equatorial electrojet as part of the global circuit: a case-study from the IEEY