Washera Geospace and Radar Science Research       Laboratory

Haron, Esleman

dc.contributor.author	Haron, Esleman
dc.date.accessioned	2024-10-27T08:15:14Z
dc.date.available	2024-10-27T08:15:14Z
dc.date.issued	2024-10
dc.identifier.uri	http://ir.bdu.edu.et/handle/123456789/16073
dc.description.abstract	The sun’s activity governs the interaction of the magnetosphere with the solar wind and Earth’s magnetic field. The influence of the magnetosphere is known as a geomagnetic storm. The main purpose of studying geomagnetic storms is to understand the current passing through the ionosphere. The geomagnetic storms that occurred during solar cycles 23 and 24 were analyzed using the southward interplanetary magnetic field (IMF (Bz)), the interplanetary electric field of the ring current (IEF), the solar wind velocity (SW), and the Dst index from the OMNI data explorer. As the results reveal at the high solar activity, CME-driven geomagnetic storms are more prominent than CIR-driven geomagnetic storms. Moreover, it is clear from the observations of geomagnetic storm events that the occurrence of geomagnetic storms is highly correlated with the southward turning of Bz, the z component of IMF. The magnitude of turning of Bz in a southward direction from a northward direction depends highly upon the severity of the storm. Moderate and intense geomagnetic storms were observed during the years 1996-2019, while they were absent of intense storms during the years 2007-2010. 15 great storms and 7 super storms were observed from 1996 to 2007, while a single great and not super storm were observed during the years 2008 to 2019. The only one great storm was observed in March 17 2015.	en_US
dc.language.iso	en_US	en_US
dc.subject	Physics	en_US
dc.title	Washera Geospace and Radar Science Research Laboratory	en_US
dc.type	Thesis	en_US