National Weather Service Weather Forecast Office

The only impacts expected for a solar radiation storm of this magnitude are minor impacts to HF radio communications in the polar regions.  However, this is the first solar radiation storm of Solar Cycle 24 and the first solar radiation storm since December of 2006. 

At this time, the solar radiation storm has subsided below threshold levels.  However, oscillation around this threshold is possible for the next several hours.  Subsequent significant activity is not expected but there may be some level of geomagnetic storming on or around August 17th and 18th from the coronal mass ejection associated with this event.  Initial observations of the coronal mass ejection direction and velocity do not indicate a high likelihood of significant geomagnetic storming but the Space Weather Prediction Center will continue to monitor this event as it unfolds. 

Coronal Mass Ejection from the Sun