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DC Field | Value | Language |
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dc.contributor.author | Simi, K.G. | |
dc.contributor.author | Manju, G. | |
dc.contributor.author | Haridas, M. K. Madhav | |
dc.contributor.author | Nayar, S. R. Prabhakaran | |
dc.contributor.author | Pant, Tarun Kumar | |
dc.contributor.author | Alex, S. | |
dc.date.accessioned | 2015-11-24T11:22:18Z | |
dc.date.accessioned | 2021-02-12T09:21:30Z | - |
dc.date.available | 2015-11-24T11:22:18Z | |
dc.date.available | 2021-02-12T09:21:30Z | - |
dc.date.issued | 2013 | |
dc.identifier.citation | Earth Planets Space, v.65, p.343-350, 2013, doi: 10.5047/eps.2012.09.005 | en_US |
dc.identifier.uri | http://localhost:8080/xmlui/handle/123456789/688 | - |
dc.description.abstract | This paper investigates the response of the equatorial, and near equatorial, ionosphere to geomagnetic disturbances during the period November 8–10, 2004. Ionosonde data from Trivandrum (8.5°N 77°E and dip 0.5°N) and SHAR (13.5°N, 80.2°E, dip ~5.5°N), magnetic field data from Tirunelveli (8.7°N, 76.9°E, dip latitude 0.5°S) and Alibag (18.64°N, 72.87°E), and GUVI O/N2 data in the Indian longitude sector, are used for the study. The behavior of interplanetary parameters is also examined in conjunction with the ionospheric data. On 8 November, the EIA around noontime is not fully inhibited even though the electrojet strength an indicates inhibition of EIA due to a disturbance dynamo electric field effect. It is the enhanced O/N2 over TRV and SHAR, with a larger increase over SHAR, which results in a larger (than expected) value of the EIA proxy parameter. On 9 November, the comparable values of foF2 at TRV and SHAR around noon time is due to the combined effect of a weakened anomaly in the presence disturbance dynamo electric field effects leading to the EIA crest being near SHAR, and increased O/N2 values at TRV and SHAR with a larger increase at TRV. On 10 November, the very strong values of the EIA proxy-SHAR parameter is attributed to the combined effects of prompt penetration electric field related modulations of EIA, and significant O/N2 changes at the equatorial, and near equatorial, latitude. Thus, the study reveals the important role of storm-induced O/N2 changes, along with prompt penetration electric fields and disturbance dynamo electric fields in modulating the ionization distribution in the equatorial ionization anomaly (EIA) region during this period. | en_US |
dc.language.iso | en | en_US |
dc.subject | Geomagnetic storm | en_US |
dc.subject | Equatorial Ionization Anomaly (EIA) | en_US |
dc.subject | O/N2 ratio | en_US |
dc.subject | Equatorial Electrojet (EEJ) | en_US |
dc.subject | EEJ | en_US |
dc.title | Ionospheric response to a geomagnetic storm during November 8–10, 2004 | en_US |
dc.type | Article | en_US |
dc.identifier.accession | 091347 | |
Appears in Collections: | ODA_Reprints |
Files in This Item:
File | Description | Size | Format | |
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AlexS_EarthPlanetsSpace_2013.pdf | Reprint | 651.07 kB | Adobe PDF | View/Open |
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