• Geomagnetic data
  • Geoelectric data
  • Atmospheric electric data
  • Observational investigation
  • Geomagnetic event catalogs
  • Annual means of geomagnetic data

  • 

    Memambetsu Geomagnetic Field

    Average 1-hour (00-59)

    from 1958-01-01T00:00:00 to 1 month ago (-P1M)

    Geomagnetic field (MMB)

    definitive

    DHZF

    Average 1-minute (00:30-01:29)

    from 1985-01-01T00:00:00 to 1 month ago (-P1M)

    Geomagnetic field (MMB)

    definitive

    DHZF

    Average 1-minute (00:30-01:29)

    from 1980-01-01T00:00:00 to 1984-12-31T23:59:00

    Geomagnetic field digitized from magnetograms (MMB)

    quasi-definitive

    DHZF

    1-second (instantaneous)

    from 1997-04-01T00:00:00 to 1 month ago (-P1M)

    Geomagnetic field (MMB)

    definitive

    DHZF or XYZF

    7.5-second (interpolation)

    from 1980-01-01T00:00:00 to 1984-12-31T23:59:59

    Geomagnetic field digitized from magnetograms (MMB)

    quasi-definitive

    DHZF

    1-decisecond (instantaneous)

    from 1997-04-01T00:00:00 to 1 month ago (-P1M)

    Geomagnetic field (MMB)

    variation

    XYZF

    Reproductions of Analog Magnetograms

    from 1980-01-01T00:00:00 to 1984-12-31T23:59:59

    Geomagnetic field (MMB)

    variation

    DHZ