Space Weather Message Code: ALTXMF Serial Number: 205 Issue Time: 2013 Dec 31 2157 UTC
ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2013 Dec 31 2156 UTC NOAA Scale: R2 - Moderate
NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/NOAAscales
Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity.