Geomagnetic Observatory Annual Means Data
The NOAA National Centers for Environmental Information (formerly National Geophysical Data Center) / World Data Center, Boulder maintains an active database of worldwide geomagnetic observatory data. 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. While the current global network of geomagnetic observatories involves over 70 countries operating more than 200 observatories, the historic database includes observations from more than 600 observatories since the early 1800s. 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. 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.
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|Distributor||Distributor information not available|
|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
Documentation links not available.
|Dataset Progress Status||Under development|
|Data Update Frequency:||Annually|
NCEI(NGDC) / WDC, Boulder compiles this global database with the cooperation and collaboration of geomagnetic observing organizations worldwide. Please recognize the specific data providers as shown in the station metadata when using this data.
|Purpose:||To further the understanding of Earth magnetism and the Sun-Earth environment and to monitor the secular change (variation), of the Earth's magnetic field.|
|Time Period:||1813-01-01 to Present|
|Spatial Bounding Box Coordinates:||
|Spatial Coverage Map:|
|Data Center keywords||
|Fees||Fee information not available.|
Last Modified: 2015-09-18
For questions about the information on this page, please email: Justin.Mabie@noaa.gov