SpaceWeather is reporting an M3.9-class solar flare occurred today -- "one of the strongest flares of young Solar Cycle 25." I don't normally sit up at attention till they start reporting on X-class flares, but reading further into today's article, this one was pretty interesting, too.

Of note was the detection of the pulse of ultraviolet and X-radiation from the flare that proceeded to "ionize the top of Earth's atmosphere." (Which is really just knocking some electrons off the molecules and elements up there, right?) SpaceWeather goes on, "This, in turn, caused a shortwave radio blackout over the Americas."

The article then reported that "While the radio blackout was underway, the sun, ironically, produced a strong shortwave radio burst."

So this "strong shortwave radio burst" must have been from a "subsequent" event, like an aftershock?, since UV, X-radiation, radio, and shortwave all travel at "c". They would all arrive together. But after listening to Ashcraft's recording from his radio telescope (included in the article), the flare is seen to be not a single burst in a short amount of time but a rather long, protracted burst, with long waves of electromagnetic pulses, maybe a minute in duration.

Of course, these light speed emanations are the signature of a coronal mass ejection. NASA's Solar Dynamics Observatory recorded the explosion near the sun's northeastern limb. So we're unlikely to see much effect from that accompanying mass ejection, since it's effectively aimed off in another direction?