Alert: X-Ray Flux exceeded M5

Space Weather Message Code: ALTXMF Serial Number: 247 Issue Time: 2014 Dec 20 0022 UTC

ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2014 Dec 20 0020 UTC NOAA Scale: R2 - Moderate NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation

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.

For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.