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Investigation of equatorial plasma bubble irregularities under different geomagnetic conditions during the equinoxes and the occurrence of plasma bubble suppression

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dc.contributor.author Timoçin, Erdinç
dc.contributor.author İnyurt, Samed
dc.contributor.author Temuçin, Hüseyin
dc.contributor.author Ansari, Kutubuddin
dc.contributor.author Jamjareegulgarn, Punyawi
dc.date.accessioned 2021-06-18T11:21:37Z
dc.date.available 2021-06-18T11:21:37Z
dc.date.issued 2020-12
dc.identifier.citation Timoçin, Erdinç...et al. (2020). "Investigation of equatorial plasma bubble irregularities under different geomagnetic conditions during the equinoxes and the occurrence of plasma bubble suppression", Çankaya Üniversitesi, Mühendislik Fakültesi, Yazılım Mühendisliği Bölümü, Vol. 177, pp. 341-350. tr_TR
dc.identifier.issn 0094-5765
dc.identifier.issn 1879-2030
dc.identifier.uri http://hdl.handle.net/20.500.12416/4832
dc.description.abstract In this study, we investigated the behavior of equatorial plasma bubble irregularities under different geomagnetic conditions during March 2015 and September 2017. It was used Total Electron Content (TEC) data obtained from SGOC (6,89 degrees N, 79,87 degrees E), IISC (12,94 degrees N, 77,57 degrees E) and HYDE (17,40 degrees N, 78,50 degrees E) receiver stations which located between the trough and the crest of the equatorial ionization anomaly (EIA). We used the Rate of TEC change (ROT) and Rate of TEC change index (ROTI) to represent plasma bubbles irregularities. These indices are a well proxy for the ionospheric fluctuations and can be used to describe features of plasma bubbles irregularities. The equatorial plasma bubble irregularities for all stations were observed between 13 UT and 20 UT (during postsunset period) during equinoxes. The intensity level of ROTI during postsunset periods was greater than 1 TECU min(-1). Also, the values of mean ROTI (ROTIave) between 13 UT and 20 UT have values greater than 0,4 TECU min(-1) while the values of ROTIave at the other hours have values less than 0,4 TECU min(-1). The geomagnetic activity has a significant effect on the occurrence of equatorial plasma bubbles irregularities. The occurrence rate of equatorial plasma bubble irregularities observed during postsunset hours increased as geomagnetic activity increases. It also was observed that the main phases of geomagnetic storms have the triggering effect of storms on equatorial plasma bubble irregularities observed at postsunset hours while the recovery phases of geomagnetic storms have the suppression effect of storms on equatorial plasma bubble irregularities. Asymmetry between two equinoxes was observed. The occurrence rate of equatorial plasma bubble irregularities in the March equinox was much larger than that of the September equinox. The occurrence probability of equatorial plasma bubbles for March Equinox was maximum with 45,1% at 17 UT while the occurrence probability of equatorial plasma bubbles for September Equinox was maximum with 11,5% at 16 UT. The enhancements and reductions in the latitudinal gradient of VTEC show similar behaviors with the occurrence of equatorial plasma irregularities. The EIA during postsunset hours contributes significantly to the occurrence of equatorial plasma bubbles irregularities. tr_TR
dc.language.iso eng tr_TR
dc.relation.isversionof 10.1016/j.actaastro.2020.08.007 tr_TR
dc.rights info:eu-repo/semantics/closedAccess tr_TR
dc.subject Geomagnetic Storms tr_TR
dc.subject Equatorial Ionopsheric Irregularities tr_TR
dc.subject Equatorial Plasma Bubbles tr_TR
dc.subject Equatorial Ionization Anomaly tr_TR
dc.title Investigation of equatorial plasma bubble irregularities under different geomagnetic conditions during the equinoxes and the occurrence of plasma bubble suppression tr_TR
dc.type article tr_TR
dc.relation.journal Acta Astronautica tr_TR
dc.contributor.authorID 182651 tr_TR
dc.identifier.volume 177 tr_TR
dc.identifier.startpage 341 tr_TR
dc.identifier.endpage 350 tr_TR
dc.contributor.department Çankaya Üniversitesi, Mühendislik Fakültesi, Yazılım Mühendisliği Bölümü tr_TR


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