What primarily causes disturbances in the Earth's magnetosphere known as geomagnetic storms?

Answer

Solar activity such as coronal mass ejections or high-speed streams of solar wind

Geomagnetic storms are disturbances in the Earth's magnetosphere caused by solar activity, specifically when coronal mass ejections or high-speed streams of solar wind impact the planet's magnetic shield.

What primarily causes disturbances in the Earth's magnetosphere known as geomagnetic storms?
effectsspace weathergeomagnetic stormsEarth's magnetic fieldhuman behavior