AA Index

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: December 19, 2025 | Last Modified: 1969-01-01T00:00:00.000+00:00

The geomagnetic aa index provides a long climatology of global geomagnetic activity using 2 antipodal observatories at Greenwich and Melbourne- IAGA Bulletin 37, 1975 p. 128

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Geomagnetism; Space Physics; Climatology, Solid Earth Geophysics DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce

Complete Metadata

describedByType	application/octet-steam
identifier	gov.noaa.ngdc.stp.indices:AA
issued	1969-01-01T00:00:00.000+00:00
language	[]
rights	otherRestrictions
spatial	180.0,-90.0,-180.0,90.0
temporal	1869-01-01T00:00:00+00:00/2012-01-01T00:00:00+00:00

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