{
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    "landingPage": "",
    "title": "AA Index",
    "description": "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",
    "language": "",
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    "modified": "2025-11-19T15:45:16.608Z",
    "publisher": {
        "@type": "org:Organization",
        "name": "Your Publisher"
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    "theme": "",
    "keyword": [
        "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"
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}