## Geomagnetism |

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Values are computed using the current International Geomagnetic Reference Field as adopted by the International Association of Geomagnetism and Aeronomy. Values are estimates based on the IGRF11 and are generally accurate to within 30 minutes of arc for D and I and 100-250 nT for the force elements (F, H, Z, X, and Y).

**Location**(latitude and longitude), entered in*degrees, minutes, seconds*. All three boxes must be filled for the calculator to calculate.

note: If you do not know your latitude and longitude and you live in the United States, enter your location in the box provided and use the "**Go**" button.**Elevation**(recommended for aircraft and satellite use) in feet, meters, or kilometers above WGS-84 reference ellipsoid. Elevation values are valid down to -10 km. Use the radio button to choose an appropriate unit.**Date**in Year, Month, Day (form defaults to the current day).- To compute your field values, hit the
**Compute!**button. The calculator will also compute values upon hitting the**Go**button.

- Declination (D) positive east, in decimal degrees

Annual change (dD) positive east, in decimal minutes per year - Inclination (I) positive down, in decimal degrees

Annual change (dI) positive down, in decimal minutes per year - Horizontal Intensity (H), in nanoTesla

Annual change (dH) in nanoTesla per year - North Component of H (X), positive north, in nanoTesla

Annual change (dX) in nanoTesla per year - East Component of H (Y), positive east, in nanoTesla

Annual change (dY) in nanoTesla per year - Vertical Intensity (Z), positive down, in nanoTesla

Annual change (dZ) in nanoTesla per year - Total Field (F), in nanoTesla

Annual change (dF) in nanoTesla per year

Last modified: Wednesday, 12-Feb-2013 10:22:11 MST