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

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
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Current SDO AIA 304 Image of the Sun

This post compiled using data gathered from NOAA and NASA.

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.