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In this picture you see above is picture of a Solar wind.  A solar wind is a stream of charged particles that comes from the sun at a speed of 400km/s.  The particles comes from a place in the sun called the corona.  The corona is a very hot place on the sun reaching temperatures up to 1 million degrees.  The hot temperatures cause the particles to move faster and since the suns gravity cannot hold the particles it flies off and it becomes part of the solar wind.  The solar wind can take between 2-4 days to reach the Earth, depending on how fast the particles are travelling. If we see a solar storm happen and know that it’s heading our way, then there is time to take some precautions or watch out. Energetic particles from solar flares can take from just a few minutes to several hours to reach us.