National Geophysical Data Center (NGDC), NOAA Satellite and Information Service

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Values for the 15-minute Index of Geomagnetic Activity at High Latitude Stations (Geomagnetic Latitude 58 Degrees)

The National Geophysical Data Center receives, on a monthly basis, Q indices from Sodankyla. These data are available from July 1957 to the present. Sodankyla indices are the most complete records of Q indices that NGDC has. The archive also contains Q indices from 15 other observatories. The Q index is a measure of geomagnetic activity assigned by high latitude (geomagnetic latitude > 58 degrees) geomagnetic observatories for each 15 minute interval. The index is designed to study auroral and ionospheric phenomena over a time scale smaller than that possible with KP. The Q scale is loosely logarithmic, with possible values from 0 to 11.

Cite this dataset when used as a source.

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    Distribution Formats
      Distributor DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
      Point of Contact Justin Mabie
      DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
      303 497-6135
      Justin.Mabie@noaa.gov
      Documentation links not available.
      Originator
      • Sodankyla Observatory, Sodankyla, Finland
      Publisher
      • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
      Date(s)
      • publication: 1957-01-01
      Edition: First
      Dataset Progress Status Under development
      Data Update Frequency: Irregular
      Purpose: Geomagnetic Activity Research
      Use Limitations
      • While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
      Time Period: 1957-07-01  to  Present
      Spatial Bounding Box Coordinates:
      N: 90.000000
      S: 58.000000
      E: 180.000000
      W: -180.000000
      Spatial Coverage Map:
      Themes
      • Earth Science > Interior & Crust
      • Space Physics > Magnetospheric Science
      • EARTH SCIENCE > SOLID EARTH > Geomagnetism > Geomagnetic Indices
      • Indices
      • WDC/STP, BOULDER > World Data Center for Solar-Terrestrial Physics, Boulder
      • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
      Places
      • Global
      Use Constraints
      • Use Constraints: None
      Access Constraints
      • Access Constraints: No Constraints
      Fees
      • Depends on the Data Set
      Lineage Statement Lineage statement not available.

      Metadata Last Modified: 2013-05-24

      For questions about the information on this page, please email: Justin.Mabie@noaa.gov