The initial increase of magnetic field in magnetic storms is caused

A. when the shock wave, associated with the gusty solar wind, compresses the magnetosphere

B. when there is a large decrease in field intensity

C. when the gust wind itself engulfs the magnetosphere

D. None of the above

Answer: Option A

Solution(By Examveda Team)

A geomagnetic storm (commonly referred to as a solar storm) is a temporary disturbance of the Earth's magnetosphere caused by a solar wind shock wave and/or cloud of magnetic field that interacts with the Earth's magnetic field.