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 Big Bear Solar Observatory.  New Jersey Institute of Technology. 2007.  <http://www.bbso.njit.edu/>.

 A Primer on Space Weather.  Space Environment Center.   <http://www.sec.noaa.gov/primer/primer.html>.

 The Solar and Heliospheric Observatory.  NASA. 2007. <http://sohowww.nascom.nasa.gov/>.

 Solar Data Monitoring and Forecasting. Space Environment Center.  2003-2007. <http://www.logsat.com/sec.htm>.

 The Sun.  <http://www.astro.uva.nl/demo/sun/kaft.htm>.