Earth's magnetic field is a crucial component of the magnetosphere, the region surrounding our planet that interacts with the solar wind. This complex system includes structures such as the magnetopause, magnetosheath, and plasma sheet, as well as processes like magnetic reconnection and field-aligned currents. Understanding the dynamics of Earth's magnetic field is essential for predicting space weather effects, such as geomagnetic storms and auroras, and mitigating potential hazards to satellites, power grids, and astronauts.