[P-EM14] [EE] Dynamics in magnetosphere and ionosphere

[PEM14-P18] The Sq-current and the Ionospheric Profile Parameters during Solar Minimum

*Nurul Shazana Abdul Hamid¹、Saeed Abioye Bello^2,4、Mardina Abdullah^2,3、Akimasa Yoshikawa⁵ (1.School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor, Malaysia.、2.Space Science Centre (ANGKASA), Institute of Climate Change, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia、3.Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia. 、4.Faculty of Physical Sciences, Department of Physics, University of Ilorin, Nigeria、5.International Center for Space Weather Science and Education (ICSWSE), Kyushu University 53, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan. )

キーワード：Ionosphere, Electron density profiles, Sq-current

The bottomside electron density profile of ionospheric F2-layer can be described by the peak electron density (NmF2), maximum height of F2-layer (hmF2), bottomside thickness (B0) and shape (B1) parameter. We analyze simultaneous quiet days records of these profile parameters with the solar quiet of geomagnetic H-component (SqH) that was obtained from the Peruvian and Ilorin stations respectively during solar minimum. We observe a midday peak in hmF2 and B0 for all the months under study. At the Peruvian station, a post-sunset peak in hmF2 and B0 during the equinoctial month was observed. For all the seasons, we observe peaks in NmF2 during the midday and post-noon periods. The results further show that the variation in SqH current is mainly responsible for that in hmF2 and B0. Both NmF2 and B1 are observed to be less sensitive to the variations in the Sq-current.