On Thursday of May 9th, a series of five or six solar flares began on the Sun. A flare is a release of huge amounts of energy due to local changes in the magnetic field. The flare itself lasts from a few minutes to an hour and a half, depending on its intensity. In the case of more energetic flares, different phenomena often occur, such as protuberance eruptions or mass ejections. The latter are called coronal mass ejections (CMEs). It is a cloud of plasma, accelerated in the coronal region (the outer part of the sun’s atmosphere) and then ejected into interplanetary space.