Sunspots, caused by the sun's tangled magnetic field, can eject solar material towards Earth resulting in geomagnetic storms.
's Solar Dynamics Observatory, shows how the dark spot begins to come into view as the sun rotates.
Sunspot AR3068 seen after rotating into view in this NASA Solar Dynamics Observatory image. Sunspots are sources of solar eruptions.are dark areas in the sun's atmosphere that result from the sun's intense magnetic fields. When these magnetic fields are strong enough, they prevent some heat from the core of the sun from reaching its atmosphere, causing patches that are cooler and darker than the surrounding regions.
If Earth happens to be in the path of these eruptions, they can interfere with the magnetic field that surrounds our planet and cause problems with power grids, radio communications
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