Danish Meteorological Institute Solar-Terrestrial Physics Division World Data Center for Geomagnetism, Copenhagen
	Catalog of Magnetic Indices

aa index

The aa index can be downloaded from this site for the following periods:

• 3-hourly values
  • 1868-01-01 -> 1996-12-31 (final)
  • 1999-05-17 -> 2002-10-27 (preliminary)
  • 2002-11-25 -> 2003-01-19 (preliminary)
  • 2003-01-27 -> 2003-09-20 (preliminary)
  • 2003-09-22 -> 2004-01-25 (preliminary)
  • 2004-04-05 -> 2004-08-08 (preliminary)
  • 2004-08-16 -> 2005-01-16 (preliminary)

Press here to obtain information about ftp-download.

The aa indices are derived by:

World Data Center C1 Homepage

Solar-Terrestrial Physics Division Homepage

Danish Meteorological Institute Homepage

Last modified 000308 by Kim Bisgaard.