Source of light, life and energy, the Sun is at the heart of the concerns of a part of the scientific community. Indeed, the threat of a solar storm constantly hovers over the Earth. These gigantic masses of waves and particles, released in an unpredictable way on the surface of the Sun, can seriously damage the networks created by man. The most recent storm narrowly avoided the Earth in 2017, but in 2003, one of them caused a power outage in Malmö and the loss of contact with two Japanese satellites. Even more impressive, the 1989 solar storm plunged Canada into darkness and cut the heating network for six hours in the middle of winter. To date, science remains unable to predict these storms. But this could soon change.