If you were listening to HF radio on September 10, 2014, you would have discovered that the bands dropped out completely for several minutes. At 1:45 p.m. EDT (1745 GMT) on Wednesday, a major solar flare disrupted radio communications.
Aurora watchers in the northern U.S. should be looking for possible activity both Thursday and Friday nights. A pair of CMEs could cause geomagnetic storms. A G3 (Strong) has been issued.
More news can be found at the Space Weather Prediction Center.