It was certainly noticed here. On Friday Night, I ventured out and was treated to auroral displays in the interval between midnight and approx 12:30am Saturday morning. Definite red glow in the sky, which moved from NNE to N and peaked with feint hints of vertical structure during the most intense manifestation.
On Saturday, the first casualty was the LowFER net, I just about heard Jerry, W6OWR, struggling to reach one of our regulars, and tried calling in to no avail.
WWV signals were only just audible on the 10 and 15 MHz frequencies, a condition which remained for the whole day. No sign of the other transmissions. Ham Bands were almmost entirely empty excepting a special event station on 20 m in Utah, whom I could not reach, and closer to home, the USS Hornet, just across the Bay in Alameda, CA, with whom I conducted a brief QSO as they were running tests on 40m. 22m was completely quiet, save for some local mid-band bleeps.
On Sunday, I did not start montoring until later in the day, but things had recovered considerably, judging by WWV's strength on 10, 15 an 20 MHz - all approaching S9.
All in all, it was very interesting.
Ed KO6BLM