Avaruussää

Aiheesta muualla

http://www.swpc.noaa.gov

http://www.spaceweather.com

http://www.sgo.fi/Data/RealTime/magnetogram.php

http://www.ig.cas.cz/en/structure/observatories/geomagnetic-observatory-budkov/forecast-of-geomagnetic-activity/

http://www.voacap.com/

http://www.interalia.plus.com/SOLAR_HO.pdf

http://www.vhfdx.info/spots/map.php

http://www.dxinfocentre.com/tropo_eur.html

http://aprs.mountainlake.k12.mn.us/