Characterization of counter electrojet current according to specific time frame in Southeast Asian sector

Nur Izzati Mohd Rosli; Nurul Shazana Abdul Hamid; Mardina Abdullah; Akimasa Yoshikawa; Teiji Uozumi

Presentation information

[E] Poster

P (Space and Planetary Sciences ) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM12] Coupling Processes in the Atmosphere-Ionosphere System

convener:Huixin Liu(Earth and Planetary Science Division, Kyushu University SERC, Kyushu University), Yuichi Otsuka(Institute for Space-Earth Environmental Research, Nagoya University), Yue Deng(University of Texas at Arlington), Loren Chang(Institute of Space Science, National Central University)

[PEM12-P25] Characterization of counter electrojet current according to specific time frame in Southeast Asian sector

*Nur Izzati Mohd Rosli¹, Nurul Shazana Abdul Hamid¹, Mardina Abdullah¹, Akimasa Yoshikawa², Teiji Uozumi² (1.Universiti Kebangsaan Malaysia, 2.Kyushu University)

Counter electrojet, CEJ current refers to the sudden reversal of equatorial electrojet, EEJ current towards the opposite direction (westward) that is usually happen at dip-equatorial region. In this study, the CEJ occurrence at Southeast Asia region is identified using EUEL index during solar cycle 24. The EUEL index is selected as it is a local index that define EEJ at particular location without global magnetospheric disturbance. The CEJ current can be categorized into a few types depending on its occurrence: morning CEJ (0500-1100), afternoon CEJ (1300-1700), evening CEJ (1800-2200) and night CEJ (2300-0400). The continuous 1-minute data has been utilized to describe CEJ behaviour in each time frame. This behaviour is including the amplitude and duration of the current itself, as well as its dependence toward local time and seasons.