That solar activity can have an effect on radio communications is well known. Sunspots, solar flares, coronal mass ejections and other disturbances 93 million miles away at the center of the solar system can cause problems for satellites circling earth as well as for shortwave and other HF radio broadcasts.
Which is all an excuse to post this picture from NASA’s Solar Dynamics Observatory (SDO) at Goddard Space Flight Center.
The bright light at the upper left is an X 1.9 Class solar flare, numbered AR1339, emitted from the Sun yesterday (3:27 p.m. EDT on Nov. 3, 2011). According to NASA, disruptions to some radio communications were noted on Earth about 45 minutes later. The SDO plans to continue to watch this region of the Sun for similar activity over the next 10 days.