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This webpage provides information about the activities of the Working Group DAT of Division V (WG-V.DAT) of the International
Association of Geomagnetism and Aeronomy ( IAGA Div. V ). At the XXIII General Assembly of
the International Union of Geodesy and Geophysics ( IUGG ) held at Sapporo, Japan from 30 June to 11 July, 2003,
the Division V of IAGA was re-organized and the current WGV.DAT, dealing with Geomagnetic data and indices, represents the former
Working Group V-2. This working group defines formats for data exchange and sets quality standards for indices of magnetic activity.
WG-V.DAT encourages free exchange of scientific information. Your comments are welcome
The latest format for observatory ASCII data dissemination is the IAGA2002 Exchange format.
Access to data from Geomagnetic observatories
The International Real Time Magnetic Observatory Network ( INTERMAGNET )
programme exists to establish a global network of cooperating digital magnetic observatories, adopting modern standard specifications
for measuring and recording equipment, in order to facilitate data exchanges and the production of geomagnetic products in near
real time.
Information on ground, marine and airborne magnetic data and indices are available from the National Geophysical Data Center, Boulder (NGDC).
The Space Physics Interactive Data Resource of NGDC ( SPIDR) offers geomagnetic data and indices.
Geomagnetic data is also available from the World Data Centers for Solar Terrestrial Physics in Russia
and China
Old magnetograms that are converted to digital images, as part of ICSU supported project "Rescue of old Analogue Magnetograms by converting to Digital Images",
are available for download here.
There are numerous indices of
magnetic activity. The International Association of Geomagnetism and Aeronomy ( IAGA ) officially
recognizes magnetic indices aa, am, Kp, Dst, and AE. More information about the IAGA indices is available from
International Services for Geomagnetic Indices ( ISGI ).
Access to Magnetic Indices
Plot of the stations whose data are used for the calculation of the corresponding indices
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