Interhemispheric Asymmetries in the Large-scale Traveling Ionospheric Disturbance propagation during the 5-6 August 2011 geomagnetic storm

This study focuses on the ionospheric response to the geomagnetic storm that occurred on August 5-6, 2011, with a specific focus on the cause of the interhemispheric asymmetry (IHA) in the large-scale traveling ionospheric disturbances (LSTIDs) in the American Sector. The ground-based total electron content (TEC) measurements show that the LSTIDs triggered in the Northern Hemisphere due to the energy deposition during the initial phase arrive at the geomagnetic equator about an hour earlier than those triggered in the Southern Hemisphere. To investigate the cause of the IHA in the LSTID propagation, we will conduct a Global Ionosphere Thermosphere Model (GITM) simulation driven by field aligned currents (FACs) derived from the AMPERE dataset. First, we will examine whether the IHA in the LSTID propagation can be reproduced. Second, we will investigate the Joule heating deposition and the LSTID propagation in the different hemispheres. Finally, we will explore how the IHA in the LSTID propagation is related to the IHA in the Joule heating deposition. This study can provide more insights into the relationship between IHAs in the high-latitude deposition and IHAs of LSTIDs propagation during geomagnetic storms.