Supercomputer Simulations Shed Light on Sun's Magnetic Dynamo.

Scientists have used advanced supercomputer simulations to demonstrate the existence and significance of a small-scale dynamo in the Sun’s magnetic field, which could help predict major solar events a few days earlier, providing vital extra time for us to prepare. The Sun’s magnetism comes from a process known as the solar dynamo, consisting of two main parts, the large-scale dynamo and the small-scale dynamo, neither of which scientists have been able to fully model yet. The research group is currently expanding their study to even lower magnetic Prandtl number values using GPU-accelerated code on the new pan-European pre-exascale supercomputer LUMI.