Propagation
Greyline Map Real time!
hfradio.org For those who can't get enough propagation info
The National Solar Observatory/Sacramento Peak Good solar pictures
NCDXF/IARU International Beacon Network Complete listing with times, freqs, etc.
Propagation Primer by AE4RV
SEC Data Library Virtually complete solar-geomagnetic records plus much more
SOHO Synoptic Data Solar images from many sources
Solar Activity Report from Big Bear Solar Observatory
Solar Terrestrial Dispatch All about the Sun - technical but interesting
Space Weather Yet another good source of solar and ionospheric data
Sunspot Cycle 23 Definitive Cycle 23 info
Sunspot Cycle Predictions
Today's Space Weather including latest K index From Boulder, updated every 3h
TEN METER INFO
28 MHz Beacons British site with many links to beacon info.
WJ5O Everything you wanted to know about 10M....
