SUNSPOT RELATION TO GEOMAGNETIC INDICES

Abstract

In this project we studied the sun and sun structure and the effect of sunspots on the earth’s weather, we found that the sun heat the earth atmosphere and degree of ionization in the ionosphere increases atthe dayside andthis causes convection in ionosphere. Solar winds sweeps toward earth at supersonic speed ranging from 300 to 1000 km/s, it is distorts the earth magnetic field which shaped magnetosphere.by calculating the disturbance storm time index (dst) we found that a negative Dst value means that Earth's magnetic field is weakened. This is particularly the case during solar storms. This is particularly the case during solar storms.