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WWV Geophysical Alert Message - NOAA Space Weather Prediction Center


Issued: 2014 Apr 20 1810 UTC

Solar-terrestrial indices for 19 April follow.
Solar flux 169 and estimated planetary A-index 15.
The estimated planetary K-index at 1800 UTC on 20 April was 4.

Space weather for the past 24 hours has been minor.
Geomagnetic storms reaching the G1 level occurred.
Solar radiation storms reaching the S1 level occurred.

Space weather for the next 24 hours is predicted to be moderate.
Geomagnetic storms reaching the G2 level are likely.
Solar radiation storms reaching the S1 level are expected.
Radio blackouts reaching the R1 level are likely.

NOAA updates this message every 3 hours; more often for alerts. If it appears incomplete or outdated, click here for alternate version.

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