Two Space Weather Alerts in last 24 hours. High Radio and X-Ray Emissions


Were getting very close to Solar Max and the Sun has been becoming active. In the last 24 hours there has been a space weather alert for X-Ray Flux exceeding M5 and type two Radio Emissions.

Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

The X-Ray event 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.

Alert #1
Issue Time: 2013 May 13 0206 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2013 May 13 0204 UTC
NOAA Scale: R2 - Moderate

Alert #2
Issue Time: 2013 May 13 0310 UTC
ALERT: Type II Radio Emission
Begin Time: 2013 May 13 0210 UTC
Estimated Velocity: 2347 km/s

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.


This post compiled using data gathered from NOAA and NASA.

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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.