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854
WOXX01 KWNP 181320
ALTXMF

Space Weather Message Code: ALTXMF
Serial Number: 218
Issue Time: 2014 Apr 18 1317 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2014 Apr 18 1255 UTC
NOAA Scale: R2 - Moderate

Comment: CORRECTION: Date threshold reached should read 18 Apr 2014 at 1255 UTC
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 http://www.swpc.noaa.gov/drap/index.html.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov




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