Space Weather ALERT 04/23/13 several events, possible coronal mass ejection

SpaceWeather
Issue Time: 2013 Apr 23 1920 UTC

ALERT: Type II Radio Emission
Begin Time: 2013 Apr 23 1823 UTC
Estimated Velocity: 820 km/s

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

NOAA Space Weather Scales (meaning of R1, S1, Etc.) can be found at http://www.knowledgeorb.com/current-space-weather/noaa-space-weather-scales/
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sunimage
Current SDO AIA 304 Image of the Sun

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.