Space Weather Alert

Space Weather AlertIssue Time: 2015 Jul 18 1529 UTC

ALERT: Type II Radio Emission
Begin Time: 2015 Jul 18 1450 UTC
Estimated Velocity: 418 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

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.