Costello Kp
The space weather prediction center, part of noaa's national weather service, provides space weather alerts, forecasts, watches, warnings and near-real-time data characterizing the space environment.
http://sec.noaa.gov/rpc/costello/pkp_15m_24h.html
DMSP Auroral Oval
DMSP Auroral Oval
http://www.spacew.com/www/auroramap.gif
STD visibility
STD visibility
http://www.spacew.com/www/aurvis.gif