Are you referring to a sinusoidal flux?
However, the magnetic energy disturbance is experienced and recorded immediately! So really, which is faster?
The "magnetic energy disturbance". That's a pretty long phrase. We don't have a scientific word for it yet, I see.
The sun is essentially a nuclear energy furnace. As energy constantly changes from one state to another, it is easy to assume there is a feedback of energy to fuel. Interesting to realize the heat energy from the sun travels to earth to make that energy conservation possible! And I did say conservation and not conversion.