From 90.9 WHYY (local NPR affiliate)- Heard them mention a major solar flare erupted just recentley, which affects radio. They actually said "Shortwave listeners across the world will be dealing with poor listening conditions for the next few days to a week".
Probably accounts for why the MW dx has been unusally horrible these past few nights. I tuned to the usual bombers, 1030 WBZ always blasts in like a local here, but for the past 2 nights it was so bad I had to go to USB to hear it, and this was at midnight!! 1090 WBAL which is from Baltimore (85 miles south of me) was barley audible. But shortwave hasn't seem to been affected much. Great conditions, at least for me, but Mw is another story.