Space Weather Alert X-Ray Flux exceeded M5


Issue Time: 2013 Jun 07 2251 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2013 Jun 07 2248 UTC
NOAA Scale: R2 – Moderate

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

NOAA Space Weather Scales (meaning of R1, S1, Etc.) can be found at

For more detailed current Space Weather visit KnowledgeOrb Space Weather at
Aurora viewing updates can be seen on the KnowledgeOrb Aurora viewing page.

About the author

Recipient of many prestigious NASA Awards including the Exceptional Public Service Medal and the Robert H. Goddard award. Experience includes working for NASA, as a contractor, in satellite design, construction and operations. Expert in the satellite operations concepts and ground systems including command, control, and science data processing.