The current barrage of solar storms pummeling Earth hasn’t harmed power grids on our planet or damaged satellites, but it’s generated a lot of buzz. On Oct. 28, the Cassini spacecraft recorded the radio emissions of one of these flares. The burst is one of the most powerful in decades, and its signal, as recorded by Cassini, resembles the clicking of a telegraph machine followed by the rush of a jet engine, according to Donald A.