International Geomagnetic Reference Field information
Standard model of the structure of Earth's magnetic field
This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "International Geomagnetic Reference Field" – news · newspapers · books · scholar · JSTOR(June 2016) (Learn how and when to remove this message)
The International Geomagnetic Reference Field (IGRF) is a standard mathematical description of the large-scale structure of the Earth's main magnetic field and its secular variation. It was created by fitting parameters of a mathematical model of the magnetic field to measured magnetic field data from surveys, observatories and satellites across the globe. The IGRF has been produced and updated under the direction of the International Association of Geomagnetism and Aeronomy (IAGA) since 1965.[1]
The IGRF model covers a significant time span, and so is useful for interpreting historical data. (This is unlike the World Magnetic Model, which is intended for navigation in the next few years.) It is updated at 5-year intervals, reflecting the most accurate measurements available at that time. The current 13th edition of the IGRF model (IGRF-13) was released in December 2019 and is valid from 1900 until 2025. For the interval from 1945 to 2015, it is "definitive" (a "DGRF"), meaning that future updates are unlikely to improve the model in any significant way.[1][2]
^Lowes, F.J. (January 2010). "The International Geomagnetic Reference Field: A "Health" Warning". IAGA working group V-MOD: Geomagnetic Field Modeling. Archived from the original on 2018-06-30.
and 24 Related for: International Geomagnetic Reference Field information
geomagnetic dipole, which can be accurately extracted from the InternationalGeomagneticReferenceField (IGRF). Earth's magnetic fieldGeomagnetic equator...
satellites and in geomagnetic observatories. This can be the InternationalGeomagneticReferenceField (covering a wide time-span in history) or the U.S. World...
Harris-Priester, and NRL-MSIS; the InternationalReference Ionosphere model; and the InternationalGeomagneticReferenceField magnetic field model. FreeFlyer is owned...
Geomagnetically induced currents (GIC) are electrical currents induced at the Earth's surface by rapid changes in the geomagneticfield caused by space...
Southern Hemisphere where the geomagneticfield lines are directed perpendicular to the nominal surface. The Geomagnetic South Pole, a related point, is...
T. I. (December 2010). "InternationalGeomagneticReferenceField: the eleventh generation". Geophysical Journal International. 183 (3): 1216–1230. Bibcode:2010GeoJI...
Geomagnetic secular variation refers to changes in the Earth's magnetic field on time scales of about a year or more. These changes mostly reflect changes...
main geomagnetic field must be subtracted from it. The InternationalGeomagneticReferenceField is usually used for this purpose. This is a large-scale...
L. (1996). "2. The present geomagneticfield: analysis and description from historical observations". The magnetic field of the earth: paleomagnetism...
about a field line at an angle that is determined by its velocity vectors, parallel and perpendicular, respectively, to the local geomagneticfield vector...
and related models, the Jacchia model includes latitudinal, seasonal, geomagnetic, and solar effects, but must be supplemented with another model at lower...
vector). The components of the magnetic field can be obtained directly from the InternationalGeomagneticReferenceField (IGRF) model. This model is compiled...
the magnetic field measurements can be compared to a known magnetic field which is given by the InternationalGeomagneticReferenceField model. Measurements...
weakening of the geomagneticfield is one of several causes for the changes in the borders of the SAA since its discovery. As the geomagneticfield continues...
where they can cause geomagnetic storms, aurorae, and in rare cases damage to electrical power grids. The largest recorded geomagnetic perturbation, resulting...
ISSN 1880-5981. MacMillan, Susan (2007). "IGRF, International GeomagneticReferenceField" (PDF). Encyclopedia of Geomagnetism and Paleomagnetism. Springer-Verlag...
Earth's magnetic field was greater. The damage caused by the resulting EMP was reportedly much greater than in Starfish Prime. The geomagnetic storm–like E3...
trends using technical analysis. Geomagnetic secular variation refers to some changes in the Earth's magnetic field. The field has variations on timescales...
electric field component (Ey), interplanetary magnetic field component (Bz), and northward (x) and eastward (y) components of geomagneticfield during supersubstorm"...
spacecraft, but that can also affect the atmosphere, ionosphere and geomagneticfield, giving rise to several other kinds of effects on human technologies...