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WWV Geophysical Alert Message - NOAA Space Weather Prediction Center

Issued: 2018 Mar 21 2105 UTC

Solar-terrestrial indices for 21 March follow.
Solar flux 69 and estimated planetary A-index 6.
The estimated planetary K-index at 2100 UTC on 21 March was 2.

No space weather storms were observed for the past 24 hours.

Space weather for the next 24 hours is predicted to be minor.
Geomagnetic storms reaching the G1 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 If it appears incomplete or outdated, click here for alternate version.

    3-Day Forecast - Text Alert System Terminology    

Additional info at The SWPC Radio Dashboard from NOAA.*
Detailed explanation of the R, S, and G Scales used by NOAA in their predictions.

*If NOAA moves their blessed radio dashboard AGAIN, search their Not Found page for a new link to Dashboards.

Grayline & MUF World Map Updates every 5 minutes; x-ray absorption contours when applicable.

Blitzortung Live Lightning Map Real-time strike data.

LightningMaps.org Blitzortung data with fancier graphics.

Vaisala Lightning Tracker Delayed cumulative info.

The Solar Terrestrial Activity Report from Jan Alvestad; valuable propagation resource with solar flux, sunspot number, planetary A index, CMEs and coronal holes.

SpaceWeather.com tracks daily events on the Sun, the solar wind, meteor rates, NASA forecasts, and other astronomical phenomena.




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