Contour maps were created for each of the seven magnetic elements (D, I, H, X, Y, Z, and F)
and for their secular variation (rate of change). These maps are available for download in pdf
format by clicking on the browse images below or you can download a zip file containing all of the map pdfs with or without the blackout zones.
You can view and print the maps using the Adobe® Reader® (available for free from the
Adobe website.) NOAA Disclaimer for external links. The maps are also available for download in the ESRI Shapefile format . A detailed description of the file format is given in the
Esri Shapefile Technical Description.
Map Download Options:
All component maps with blackout zone zip file All component maps without blackout zone zip file Maps and ESRI Shapefiles of all the components (geographic and polar stereographic projections) and blackout zones for years 2020 through 2025 are available via our Web accessible folder
Component
Miller Projection Main Field
Miller Projection Secular Variation
Polar Stereographic Arctic Main Field
Polar Stereographic Antarctic Main Field
D
F
H
I
X
Y
Z
Other Magnetic Maps:
Miscellaneous magnetic field component maps and figures.
Geomagnetic Coordinates
Change in Declination over 10 years (WMM2020 - WMM2010)
Declination and Secular Variation over North America
