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<p><strong>Response of equatorial ionosphere during the super geomagnetic storm of April 2000 </strong></p>

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Title Statement <p><strong>Response of equatorial ionosphere during the super geomagnetic storm of April 2000 </strong></p>
 
Added Entry - Uncontrolled Name Chandra, Harish ; Physical Research Laboratory
Rastogi, R G; Physical Research Labpratory
Physical Reasearch Laboratory
 
Uncontrolled Index Term Ionosphere; Equatorial ionosphere
Equatorial ionosphere; Space weather; Geomagnetic storm
 
Summary, etc. <p>The effects of the super geomagnetic storm of 6 April 2000 on E and F-regions of the ionosphere at Thumba, India and at Jicamarca, Peru are studied. The geomagnetic storm started at 1630 UT on 6 April 2000 with sudden increase in solar wind speed and ion density and southward turning of IMF-Bz from 0 to -25 nT. The event was unique with IMF-Bz steady southward for about 6 hours and later turning from -30 nT at 2300 UT to 10 nT at 02 UT and large fluctuations around 1200 UT on 7 April 2000. The southward turning of IMF-Bz on the night of 06-07 April inhibited the development of spread-F irregularities at Thumba. The large excursions of IMF-Bz on 7 April 2000 inhibited the Es-q at Thumba. At Jicamarca the southward turning of IMF-Bz on 6 April caused a very large enhancement of EEJ current and generated very strong Es-q. The northward turning of IMF-Bz on 7 April 2000 is associated with large rise of F-layer around midnight and ESF was seen at 0100 LT however later the F-layer descended and inhibited ESF irregularities. The results confirm the earlier suggestion of Rastogi and Patel (1975) that northward (southward) turning of IMF-Bz generates an eastward (westward) electric field in night side of ionosphere and westward (eastward) electric field in the dayside of ionosphere. The effect of a solar weather event on the equatorial ionosphere at different longitudes depends on the local solar time of the event.</p>
 
Publication, Distribution, Etc. Indian Journal of Radio & Space Physics (IJRSP)
2016-12-29 15:25:32
 
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http://op.niscair.res.in/index.php/IJRSP/article/view/10834
 
Data Source Entry Indian Journal of Radio & Space Physics (IJRSP); ##issue.vol## 45, ##issue.no## 2 (2016): Indian Journal of Radio & Space Physics
 
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Nonspecific Relationship Entry http://op.niscair.res.in/index.php/IJRSP/article/download/10834/30496
http://op.niscair.res.in/index.php/IJRSP/article/download/10834/30497
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http://op.niscair.res.in/index.php/IJRSP/article/download/10834/39809
 
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