• Geomagnetic Observatory Database February 2004

    The 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.

    Data and Resources

    Metadata Source

    Harvested from NGDC - STP - Geomag - iso

    About this Dataset

    Resource Type Dataset
    Metadata Date May 28, 2013
    Metadata Created Date Aug 20, 2013
    Metadata Updated Date May 29, 2014
    Reference Date(s) Jan 01, 1972 (publication)
    Responsible Party DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce (Point of Contact)
    Contact Email
    Access Constraints Use Constraints: None, Access Constraints: No Constraints
    Bbox East Long 180.000000
    Bbox North Lat 90.000000
    Bbox South Lat -90.000000
    Bbox West Long -180.000000
    Coupled Resource
    Frequency Of Update annually
    Guid gov.noaa.ngdc.stp.geomag:1806
    Harvest Object Id 416fc3f2-ede1-4b3c-a77d-3fc018fa941c
    Harvest Source Id 21ab3ced-499d-4f59-bb62-448fe06ef827
    Harvest Source Title NGDC - STP - Geomag - iso
    Licence 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.
    Metadata Language
    Metadata Type geospatial
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 1800-01-01

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