Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/696
DC Field | Value | Language |
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dc.contributor.authorall | Agopyan, H.; Istanbul University,Vocational School of High Technology,Istanbul,Turkey | en |
dc.date.accessioned | 2006-02-14T09:37:02Z | en |
dc.date.available | 2006-02-14T09:37:02Z | en |
dc.date.issued | 2002 | en |
dc.identifier.uri | http://hdl.handle.net/2122/696 | en |
dc.description.abstract | The present study concentrates on the effects on the ionosphere of an individual severe magnetic Storm of the Sudden Commencement (SSC)type,with SSC taking place in the daytime hours.The storm started on 29 October 1968 and went on to 2 November 1968 with geomagnetic 3-hourly magnetic activity index reaching values of Kp 7. Interplanetary magnetic field polarities included A (field polarity Away from the solar wind)positive and T (field polarity Towards the solar wind)negative polarities.In these conditions,the local response of true height of F-region (hF) ionization fails nonlinearly from fixed plasma densities.The interplanetary B z ,the magnetic field H - component and K p were examined for the 5 days following the sudden commencement.Due to intensive geomagnetic SC effects,the lower and upper limits of the F -regions were unbalanced because of gravity relaxation and solar wind pressure effects,until normal levels were restored.In the F -layer 70%deviations of critical frequencies (f 0 F )from median values,as well as hF level variations reaching hundreds of kilometers,were observed and were responsible for the destruction of communication channels.With a plasmapause location value L =1.6 and with K p 7 the protonosphere reservoir should take 1.1 days for its replenishment;one day was in fact insufficient for a full plasma recovery. | en |
dc.format.extent | 106210 bytes | en |
dc.format.mimetype | application/pdf | en |
dc.language.iso | English | en |
dc.publisher.name | INGV | en |
dc.relation.ispartof | Annals of Geophysics | en |
dc.relation.ispartofseries | 5/45 (2002) | en |
dc.subject | geomagnetic activity | en |
dc.subject | ionospheric positive storm | en |
dc.subject | neutral gas concentration excess | en |
dc.subject | radio reception | en |
dc.subject | ring current | en |
dc.title | Severe magnetic storm effects in the ionosphere over Istanbul:a case study | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.subject.INGV | 01. Atmosphere::01.02. Ionosphere::01.02.06. Instruments and techniques | en |
dc.subject.INGV | 04. Solid Earth::04.05. Geomagnetism::04.05.08. Instruments and techniques | en |
dc.description.journalType | JCR Journal | en |
dc.description.fulltext | open | en |
dc.contributor.author | Agopyan, H. | en |
dc.contributor.department | Istanbul University,Vocational School of High Technology,Istanbul,Turkey | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | open | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Istanbul University,Vocational School of High Technology,Istanbul,Turkey | - |
crisitem.classification.parent | 01. Atmosphere | - |
crisitem.classification.parent | 04. Solid Earth | - |
Appears in Collections: | Annals of Geophysics |
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File | Description | Size | Format | |
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621_628 Agopyan.pdf | 103.72 kB | Adobe PDF | View/Open |
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