NCEI (formerly NGDC)
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Geomagnetic Observatory Database February 2004

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.
Cite this dataset when used as a source.
Online Access
    Distribution Formats
    • TIFF
    Distributor DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
    Dataset Point of Contact Justin Mabie
    Space and Terrestrial Weather Specialist
    DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
    (303) 497-6135
    Justin.Mabie@noaa.gov
    Documentation links not available.
    Date(s)
    • publication: 1972-01-01
    Edition: First
    Dataset Progress Status Under development
    Data Update Frequency: Annually
    Supplemental Information:
    Formally FE 17, 119, 626. Entry_ID G01152
    Purpose: Provide information for research and surveyors
    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.
    Originator(s)
    • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
    Publisher(s)
    • 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
    Time Period: 1800-01-01 to Present
    Spatial Bounding Box Coordinates:
    N: 90.000000
    S: -90.000000
    E: 180.000000
    W: -180.000000
    Spatial Coverage Map:
    Theme keywords
    • EARTH SCIENCE > SOLID EARTH > Geomagnetism > Geomagnetic Forecasts
    • EARTH SCIENCE > SOLID EARTH > Geomagnetism > Geomagnetic Indices
    • EARTH SCIENCE > SOLID EARTH > Geomagnetism > Geomagnetic Induction
    • EARTH SCIENCE > SOLID EARTH > Geomagnetism > Magnetic Anomalies
    • EARTH SCIENCE > SOLID EARTH > Geomagnetism > Magnetic Declination
    • EARTH SCIENCE > SOLID EARTH > Geomagnetism > Magnetic Inclination
    • EARTH SCIENCE > SOLID EARTH > Geomagnetism > Magnetic Intensity
    • EARTH SCIENCE > SOLID EARTH > Geomagnetism > Paleomagnetism
    • EARTH SCIENCE > SOLID EARTH > Geomagnetism > Reference Fields
    • Secular Change
    • Magnetic Total Intensity
    • Magnetic Declination
    • Magnetic Observatory
    • Magnetic Models
    • Magnetic Survey
    • Magnetospheric Science
    Data Center keywords
    • 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
    Place keywords
    • Global
    Use Constraints
    • Use Constraints: None
    Access Constraints
    • Access Constraints: No Constraints
    Fees
    • Free
    Lineage information for: repository
    Processing Steps
    • 2015-04-22T00:00:00 - NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
    Lineage information for: dataset
    Processor
    • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
    Processing Steps
    • Placed in Purgartory 1/26/2007 because info in this record may be used to create other records.
    Last Modified: 2015-09-18
    For questions about the information on this page, please email: Justin.Mabie@noaa.gov