Geomagnetic data and data products
Follow the links to the resources you need!
Observatory minute and hourly means. Plot data and download data in various formats.
Observatory minute and hourly means. FTP catalogue. Data available in fixed formats.
Includes jump information for observatory data discontinuities.
World Magnetic Model (WMM), International Geomagnetic Reference Field (IRGF-13), Geomagnetic coordinate calculator and British Grid Magnetic Angle Calculator.
Land survey and repeat station results from around the world.
View analogue magnetogram from current and past UK magnetic observatories.
Indices: Kp , ap , Cp and C9 .
Data: Bartels rotation, International Sunspot Number, F10.7 flux.
Forecasts of local activity (UK observatories), Ap index and F10.7 flux.
Local K -index values for UK observatories. Global Ap and aa index values.
A database of monthly mean values (previously maintained by BCMT).
List of all magnetic observatories (maintained on behalf of IAGA Division V OBS).
View digitised copies of historical yearbooks from UK and past British colonial observatories.