This thesis investigates the impact of geomagnetic storms on the global ionospheric Total Electron Content (TEC) during selected events from April 2023 to August 2024. The primary objective is to analyze the dynamic response of the ionosphere to solar and geomagnetic activities, focusing on the variations in TEC associated with these storm events. The research utilizes data obtained from the Global Ionospheric Map to evaluate significant fluctuations in TEC during multiple geomagnetic storm episodes. Notably, the storm event from April 22-25, 2023, resulted in a substantial decrease in TEC, particularly pronounced in the Northern Hemisphere, highlighting the storm's adverse effects on satellite communication and navigation. Conversely, the geomagnetic storm in November 2023 led to an increase in TEC across both hemispheres, illustrating the complexity and variability of ionospheric responses to geomagnetic disturbances. The findings emphasize the necessity for region-specific analyses to accurately predict TEC behavior during such disturbances. A critical observation is the asymmetric response of the Northern and Southern Hemispheres, where contrasting TEC behaviors were noted during the March 2024 storm. This underscores the intricate dynamics at play within the ionosphere, indicating that one hemisphere may benefit from improved conditions while the other may experience detrimental effects during the same storm. Additionally, the study explores the influence of atmospheric composition on TEC variations, particularly during storm events. Changes in the oxygen-to-nitrogen ratio were linked to significant impacts on ionospheric electron density, suggesting that thermospheric shifts can have profound effects on ionospheric behavior. Overall, the thesis advocates for continuous monitoring of ionospheric conditions to enhance predictive capabilities and mitigate the impacts of geomagnetic storms on technological applications. By deepening our understanding of TEC fluctuations and their underlying mechanisms, this research contributes to the ongoing efforts to maintain reliable communication and navigation systems in the face of evolving space weather conditions.