In this GPS World article, Eric Gakstatter provides good information about January's solar activity, as well as general info. on the upcoming Solar Cycle 24 and its potentially negative impact on GPS operations and accuracy. There are some concerns, especially for high-accuracy surveying, but the mainstream media does tend to sensationalize these events.
He notes that the NOAA Space Weather Prediction Center provides an email alert system for forecasts and warnings - sign up at http://www.swpc.noaa.gov/alerts/index.html
See Eric's full article at: http://www.gpsworld.com/survey/solar-activity-and-rf-id-technology-9797