Geomagnetic Observatory Database February 2004

Description

The NOAA National Centers for Environmental Information (formerly National Geophysical Data Center) maintains an active database of worldwide geomagnetic observatory data to further the understanding of Earth magnetism and the Sun-Earth environment.Historically, magnetic observatories were established to monitor the secular change (variation), of the Earth's magnetic field, and this remains one of their most important functions. This generally involves absolute measurements sufficient in number to monitor instrumental drift and to produce annual means. Over 70 countries operate more than 200 observatories worldwide. The magnetic observatory data are crucial to the studies of secular change, investigations into the Earth's interior, navigation, communication, and to global modeling efforts. In addition to the continuously operating magnetic observatories, many countries make measurements at temporary magnetic stations (known as repeat stations), over a period of days every 5 - 10 years.The Earth's magnetic field is described by seven parameters. These are declination (D), inclination (I), horizontal intensity (H), vertical intensity (Z), total intensity (F) and the north (X) and east (Y) components of the horizontal intensity. By convention, declination is considered positive when measured east of north, inclination and vertical intensity positive down, X positive north, and Y positive east. The magnetic field observed on Earth is constantly changing.

Resources

Name Format Description Link
21 geomag.html https://www.ngdc.noaa.gov/seg/potfld/geomag.html
21 operobs.html https://www.ngdc.noaa.gov/seg/potfld/operobs.html
0 ftp://ftp.ngdc.noaa.gov/Solid_Earth/Mainfld_Mag/
0 The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords

Tags

  • magnetic declination
  • secular change
  • geomagnetic indices
  • nesdis
  • magnetic inclination
  • national geophysical data center
  • noaa
  • global
  • magnetic anomalies
  • geomagnetic forecasts
  • u.s. department of commerce
  • earth science
  • magnetospheric science
  • magnetic intensity
  • magnetic models
  • doc/noaa/nesdis/ngdc
  • magnetic survey
  • solid earth
  • paleomagnetism
  • doc/noaa/nesdis/ncei
  • magnetic total intensity
  • magnetic observatory
  • reference fields
  • geomagnetism
  • national centers for environmental information
  • geomagnetic induction

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