Geomagnetic data and data products

Follow the links to the resources you need!

Screenshot of WDC data portal

Observatory Data Portal

Observatory minute and hourly means. Plot data and download data in various formats.

Screenshot of WDC catalogue page

Observatory Data Catalogue

Observatory minute and hourly means. FTP catalogue. Data available in fixed formats.

Screenshot of annual mean page

Observatory Annual Means

Includes jump information for observatory data discontinuities.

Example model chart

Magnetic Field Models

World Magnetic Model (WMM), International Geomagnetic Reference Field (IRGF-13), Geomagnetic coordinate calculator and British Grid Magnetic Angle Calculator.

Screenshot of survey page

Magnetic Survey

Land survey and repeat station results from around the world.

Example magnetogram

Historical Magnetograms

View analogue magnetogram from current and past UK magnetic observatories.

Screenshot of data page

Solar and Geomagnetic Data and Indices

Indices: Kp , ap , Cp and C9 .

Data: Bartels rotation, International Sunspot Number, F10.7 flux.

Screenshot of forecast page

Geomagnetic and Solar Activity Forecasts

Forecasts of local activity (UK observatories), Ap index and F10.7 flux.

Example indices plot


Local K -index values for UK observatories. Global Ap and aa index values.

Example chart showing monthly means from Eskdalemuir against the IGRF model

Observatory Monthly Means

A database of observatory monthly mean values.

Screenshot of survey page

List of Magnetic Observatories

List of all magnetic observatories (maintained on behalf of IAGA Division V OBS).

Photo of yearbooks

Historical Yearbooks

View digitised copies of historical yearbooks from UK and past British colonial observatories.