Answer:
The answer to the question: What happens to Earth when large magnetic storms from the sun bombard the atmosphere? would be: most of the radiation from the sun´s magnetic storm hits the Earth´s own magnetic fields and is reflected from the atmosphere, otherwise life on Earth would not be possible, and the energy charges the magnetosphere and can damage certain devices such as satellites, and can damage communication systems, as well as electrical systems.
Explanation:
These magnetic sun storms, are called solar flares, and could be deadly were it not for the Earth´s powerful magnetic fields. These fields, called magnetosphere, are entrusted with the task of reflecting back most radiation from the sun and space itself, protecting life. In the poles, for example, it is possible to see the interaction between solar flares and the magnetic shields of Earth in the boreal lights. However, one problem for us is that the energy released by the interaction can bring down satellites and most oftenly knocks down communication systems on Earth. This energy can also overcharge electrical systems.